./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF --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 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:27:05,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:27:05,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:27:05,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:27:05,976 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:27:05,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:27:05,983 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:27:05,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:27:05,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:27:05,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:27:05,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:27:06,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:27:06,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:27:06,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:27:06,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:27:06,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:27:06,017 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:27:06,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:27:06,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:27:06,030 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:27:06,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:27:06,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:27:06,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:27:06,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:27:06,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:27:06,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:27:06,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:27:06,048 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:27:06,048 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:27:06,050 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:27:06,051 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:27:06,052 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:27:06,054 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:27:06,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:27:06,058 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:27:06,058 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:27:06,059 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:27:06,059 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:27:06,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:27:06,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:27:06,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:27:06,063 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 06:27:06,115 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:27:06,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:27:06,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:27:06,117 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:27:06,118 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:27:06,118 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:27:06,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:27:06,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:27:06,119 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:27:06,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:27:06,121 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:27:06,121 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:27:06,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:27:06,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:27:06,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:27:06,123 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:27:06,123 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:27:06,123 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:27:06,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:27:06,124 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:27:06,124 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:27:06,124 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:27:06,125 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:27:06,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:27:06,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:27:06,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:27:06,126 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:27:06,126 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:27:06,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:27:06,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:27:06,127 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:27:06,127 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_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2021-11-20 06:27:06,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:27:06,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:27:06,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:27:06,495 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:27:06,496 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:27:06,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-11-20 06:27:06,568 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/data/452e2dae8/426c9f07f64a455d83376813395c711e/FLAGfa8ff8aab [2021-11-20 06:27:07,182 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:27:07,182 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-11-20 06:27:07,204 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/data/452e2dae8/426c9f07f64a455d83376813395c711e/FLAGfa8ff8aab [2021-11-20 06:27:07,442 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/data/452e2dae8/426c9f07f64a455d83376813395c711e [2021-11-20 06:27:07,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:27:07,446 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:27:07,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:27:07,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:27:07,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:27:07,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:27:07" (1/1) ... [2021-11-20 06:27:07,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fd786eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:07, skipping insertion in model container [2021-11-20 06:27:07,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:27:07" (1/1) ... [2021-11-20 06:27:07,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:27:07,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:27:07,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:27:07,890 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:27:07,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:27:07,966 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:27:07,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:07 WrapperNode [2021-11-20 06:27:07,966 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:27:07,968 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:27:07,968 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:27:07,968 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:27:07,976 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:07" (1/1) ... [2021-11-20 06:27:07,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:07" (1/1) ... [2021-11-20 06:27:08,023 INFO L137 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2021-11-20 06:27:08,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:27:08,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:27:08,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:27:08,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:27:08,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:07" (1/1) ... [2021-11-20 06:27:08,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:07" (1/1) ... [2021-11-20 06:27:08,052 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:07" (1/1) ... [2021-11-20 06:27:08,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:07" (1/1) ... [2021-11-20 06:27:08,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:07" (1/1) ... [2021-11-20 06:27:08,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:07" (1/1) ... [2021-11-20 06:27:08,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:07" (1/1) ... [2021-11-20 06:27:08,075 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:27:08,075 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:27:08,076 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:27:08,076 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:27:08,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:07" (1/1) ... [2021-11-20 06:27:08,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:27:08,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:08,122 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:27:08,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:27:08,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:27:08,169 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-11-20 06:27:08,169 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-11-20 06:27:08,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:27:08,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:27:08,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:27:08,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:27:08,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:27:08,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:27:08,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:27:08,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:27:08,263 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:27:08,265 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:27:08,577 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:27:08,587 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:27:08,588 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:27:08,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:27:08 BoogieIcfgContainer [2021-11-20 06:27:08,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:27:08,593 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:27:08,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:27:08,598 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:27:08,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:27:07" (1/3) ... [2021-11-20 06:27:08,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6748762c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:27:08, skipping insertion in model container [2021-11-20 06:27:08,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:27:07" (2/3) ... [2021-11-20 06:27:08,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6748762c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:27:08, skipping insertion in model container [2021-11-20 06:27:08,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:27:08" (3/3) ... [2021-11-20 06:27:08,603 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2021-11-20 06:27:08,609 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:27:08,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-20 06:27:08,666 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:27:08,678 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:27:08,679 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-20 06:27:08,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:27:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 06:27:08,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:08,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 06:27:08,723 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:08,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:08,733 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2021-11-20 06:27:08,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:08,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378941198] [2021-11-20 06:27:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:08,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:09,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:09,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378941198] [2021-11-20 06:27:09,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378941198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:09,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:09,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:27:09,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94214613] [2021-11-20 06:27:09,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:09,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:27:09,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:09,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:27:09,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:27:09,110 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:09,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:09,385 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-11-20 06:27:09,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:27:09,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 06:27:09,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:09,405 INFO L225 Difference]: With dead ends: 124 [2021-11-20 06:27:09,405 INFO L226 Difference]: Without dead ends: 118 [2021-11-20 06:27:09,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:27:09,413 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 149 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:09,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 109 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:27:09,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-20 06:27:09,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2021-11-20 06:27:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 82 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-20 06:27:09,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2021-11-20 06:27:09,496 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 6 [2021-11-20 06:27:09,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:09,496 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2021-11-20 06:27:09,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:09,497 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2021-11-20 06:27:09,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 06:27:09,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:09,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 06:27:09,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:27:09,499 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:09,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:09,502 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2021-11-20 06:27:09,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:09,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832025100] [2021-11-20 06:27:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:09,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:09,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:09,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832025100] [2021-11-20 06:27:09,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832025100] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:09,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:09,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:27:09,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493528569] [2021-11-20 06:27:09,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:09,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:27:09,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:09,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:27:09,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:09,723 INFO L87 Difference]: Start difference. First operand 92 states and 123 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:09,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:09,905 INFO L93 Difference]: Finished difference Result 221 states and 308 transitions. [2021-11-20 06:27:09,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:27:09,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 06:27:09,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:09,909 INFO L225 Difference]: With dead ends: 221 [2021-11-20 06:27:09,910 INFO L226 Difference]: Without dead ends: 221 [2021-11-20 06:27:09,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:27:09,912 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 120 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:09,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 207 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-20 06:27:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 168. [2021-11-20 06:27:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 133 states have (on average 1.6240601503759398) internal successors, (216), 150 states have internal predecessors, (216), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-20 06:27:09,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 261 transitions. [2021-11-20 06:27:09,964 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 261 transitions. Word has length 6 [2021-11-20 06:27:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:09,964 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 261 transitions. [2021-11-20 06:27:09,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 261 transitions. [2021-11-20 06:27:09,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 06:27:09,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:09,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:09,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:27:09,973 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:09,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:09,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2021-11-20 06:27:09,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:09,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747352938] [2021-11-20 06:27:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:09,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:10,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:10,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747352938] [2021-11-20 06:27:10,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747352938] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:10,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:10,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:27:10,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046353244] [2021-11-20 06:27:10,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:10,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:27:10,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:10,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:27:10,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:10,223 INFO L87 Difference]: Start difference. First operand 168 states and 261 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:10,437 INFO L93 Difference]: Finished difference Result 244 states and 348 transitions. [2021-11-20 06:27:10,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:27:10,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 06:27:10,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:10,443 INFO L225 Difference]: With dead ends: 244 [2021-11-20 06:27:10,443 INFO L226 Difference]: Without dead ends: 244 [2021-11-20 06:27:10,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:27:10,452 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 136 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:10,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 162 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:27:10,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-20 06:27:10,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2021-11-20 06:27:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.6102941176470589) internal successors, (219), 153 states have internal predecessors, (219), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-20 06:27:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 264 transitions. [2021-11-20 06:27:10,487 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 264 transitions. Word has length 7 [2021-11-20 06:27:10,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:10,487 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 264 transitions. [2021-11-20 06:27:10,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:10,488 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 264 transitions. [2021-11-20 06:27:10,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 06:27:10,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:10,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:10,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:27:10,489 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:10,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:10,490 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2021-11-20 06:27:10,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:10,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954856770] [2021-11-20 06:27:10,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:10,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:10,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:10,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954856770] [2021-11-20 06:27:10,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954856770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:10,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:10,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:27:10,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016704346] [2021-11-20 06:27:10,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:10,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:27:10,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:10,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:27:10,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:10,754 INFO L87 Difference]: Start difference. First operand 171 states and 264 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:10,898 INFO L93 Difference]: Finished difference Result 223 states and 309 transitions. [2021-11-20 06:27:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:27:10,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 06:27:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:10,907 INFO L225 Difference]: With dead ends: 223 [2021-11-20 06:27:10,907 INFO L226 Difference]: Without dead ends: 223 [2021-11-20 06:27:10,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:27:10,909 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 89 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:10,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 204 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:10,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-20 06:27:10,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 171. [2021-11-20 06:27:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.5955882352941178) internal successors, (217), 153 states have internal predecessors, (217), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-20 06:27:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 262 transitions. [2021-11-20 06:27:10,935 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 262 transitions. Word has length 8 [2021-11-20 06:27:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:10,936 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 262 transitions. [2021-11-20 06:27:10,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 262 transitions. [2021-11-20 06:27:10,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:27:10,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:10,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:10,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:27:10,937 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:10,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:10,938 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2021-11-20 06:27:10,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:10,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481605756] [2021-11-20 06:27:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:10,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:11,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:11,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:11,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481605756] [2021-11-20 06:27:11,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481605756] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:11,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:11,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:27:11,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900769927] [2021-11-20 06:27:11,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:11,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:27:11,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:11,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:27:11,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:11,036 INFO L87 Difference]: Start difference. First operand 171 states and 262 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:11,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:11,153 INFO L93 Difference]: Finished difference Result 250 states and 344 transitions. [2021-11-20 06:27:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:27:11,154 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 06:27:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:11,156 INFO L225 Difference]: With dead ends: 250 [2021-11-20 06:27:11,156 INFO L226 Difference]: Without dead ends: 250 [2021-11-20 06:27:11,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:27:11,162 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 135 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:11,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 193 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:11,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-20 06:27:11,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 207. [2021-11-20 06:27:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 170 states have (on average 1.5705882352941176) internal successors, (267), 188 states have internal predecessors, (267), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-20 06:27:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 312 transitions. [2021-11-20 06:27:11,195 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 312 transitions. Word has length 9 [2021-11-20 06:27:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:11,199 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 312 transitions. [2021-11-20 06:27:11,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 312 transitions. [2021-11-20 06:27:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:27:11,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:11,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:11,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:27:11,201 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:11,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:11,204 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2021-11-20 06:27:11,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:11,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258995551] [2021-11-20 06:27:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:11,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:11,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:11,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:11,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258995551] [2021-11-20 06:27:11,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258995551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:11,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:11,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:27:11,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874853101] [2021-11-20 06:27:11,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:11,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:27:11,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:11,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:27:11,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:11,304 INFO L87 Difference]: Start difference. First operand 207 states and 312 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:11,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:11,426 INFO L93 Difference]: Finished difference Result 245 states and 327 transitions. [2021-11-20 06:27:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:27:11,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:27:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:11,434 INFO L225 Difference]: With dead ends: 245 [2021-11-20 06:27:11,434 INFO L226 Difference]: Without dead ends: 245 [2021-11-20 06:27:11,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:27:11,435 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 160 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:11,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 194 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:11,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-20 06:27:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 217. [2021-11-20 06:27:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 179 states have (on average 1.5642458100558658) internal successors, (280), 198 states have internal predecessors, (280), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-20 06:27:11,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 325 transitions. [2021-11-20 06:27:11,446 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 325 transitions. Word has length 10 [2021-11-20 06:27:11,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:11,447 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 325 transitions. [2021-11-20 06:27:11,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:11,447 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 325 transitions. [2021-11-20 06:27:11,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:27:11,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:11,464 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:11,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:27:11,465 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:11,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:11,465 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2021-11-20 06:27:11,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:11,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763502295] [2021-11-20 06:27:11,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:11,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:11,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:11,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763502295] [2021-11-20 06:27:11,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763502295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:11,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280483794] [2021-11-20 06:27:11,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:11,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:11,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:11,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:11,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:27:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:11,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:27:11,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:12,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:12,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:12,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280483794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:12,161 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:12,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2021-11-20 06:27:12,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122352205] [2021-11-20 06:27:12,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:12,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:27:12,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:12,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:27:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:27:12,166 INFO L87 Difference]: Start difference. First operand 217 states and 325 transitions. Second operand has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:12,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:12,435 INFO L93 Difference]: Finished difference Result 302 states and 415 transitions. [2021-11-20 06:27:12,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:27:12,435 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 06:27:12,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:12,457 INFO L225 Difference]: With dead ends: 302 [2021-11-20 06:27:12,457 INFO L226 Difference]: Without dead ends: 302 [2021-11-20 06:27:12,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:27:12,459 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 415 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:12,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 448 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:27:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-20 06:27:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 229. [2021-11-20 06:27:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 188 states have (on average 1.4893617021276595) internal successors, (280), 210 states have internal predecessors, (280), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (44), 11 states have call predecessors, (44), 11 states have call successors, (44) [2021-11-20 06:27:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 335 transitions. [2021-11-20 06:27:12,481 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 335 transitions. Word has length 14 [2021-11-20 06:27:12,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:12,482 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 335 transitions. [2021-11-20 06:27:12,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:12,482 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 335 transitions. [2021-11-20 06:27:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:27:12,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:12,484 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:12,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:12,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:12,699 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:12,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2021-11-20 06:27:12,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:12,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820178243] [2021-11-20 06:27:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:12,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:12,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:12,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820178243] [2021-11-20 06:27:12,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820178243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:12,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929435962] [2021-11-20 06:27:12,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:12,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:12,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:12,835 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:12,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:27:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:12,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:27:12,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:13,075 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 19 treesize of output 7 [2021-11-20 06:27:13,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:13,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:13,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929435962] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:13,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:13,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-20 06:27:13,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5579688] [2021-11-20 06:27:13,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:13,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:27:13,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:13,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:27:13,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:27:13,171 INFO L87 Difference]: Start difference. First operand 229 states and 335 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:13,511 INFO L93 Difference]: Finished difference Result 335 states and 463 transitions. [2021-11-20 06:27:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:27:13,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 06:27:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:13,518 INFO L225 Difference]: With dead ends: 335 [2021-11-20 06:27:13,518 INFO L226 Difference]: Without dead ends: 335 [2021-11-20 06:27:13,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:27:13,522 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 221 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:13,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 411 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:27:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-20 06:27:13,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 239. [2021-11-20 06:27:13,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 197 states have (on average 1.482233502538071) internal successors, (292), 220 states have internal predecessors, (292), 11 states have call successors, (11), 7 states have call predecessors, (11), 13 states have return successors, (46), 11 states have call predecessors, (46), 11 states have call successors, (46) [2021-11-20 06:27:13,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 349 transitions. [2021-11-20 06:27:13,544 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 349 transitions. Word has length 15 [2021-11-20 06:27:13,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:13,548 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 349 transitions. [2021-11-20 06:27:13,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:13,549 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 349 transitions. [2021-11-20 06:27:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:27:13,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:13,550 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:13,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:13,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:13,776 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:13,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:13,776 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2021-11-20 06:27:13,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:13,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993716214] [2021-11-20 06:27:13,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:13,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:13,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:13,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993716214] [2021-11-20 06:27:13,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993716214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:13,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763794931] [2021-11-20 06:27:13,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:13,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:13,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:13,924 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:13,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:27:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:13,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:27:13,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:14,221 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 37 treesize of output 25 [2021-11-20 06:27:14,232 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 22 treesize of output 10 [2021-11-20 06:27:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:14,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:14,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763794931] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:14,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:14,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2021-11-20 06:27:14,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371298474] [2021-11-20 06:27:14,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:14,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:27:14,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:14,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:27:14,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:27:14,434 INFO L87 Difference]: Start difference. First operand 239 states and 349 transitions. Second operand has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:15,100 INFO L93 Difference]: Finished difference Result 570 states and 775 transitions. [2021-11-20 06:27:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:27:15,101 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 06:27:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:15,105 INFO L225 Difference]: With dead ends: 570 [2021-11-20 06:27:15,105 INFO L226 Difference]: Without dead ends: 570 [2021-11-20 06:27:15,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:27:15,107 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 502 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:15,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 748 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:27:15,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-11-20 06:27:15,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 347. [2021-11-20 06:27:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 294 states have (on average 1.5136054421768708) internal successors, (445), 322 states have internal predecessors, (445), 14 states have call successors, (14), 10 states have call predecessors, (14), 21 states have return successors, (60), 14 states have call predecessors, (60), 14 states have call successors, (60) [2021-11-20 06:27:15,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 519 transitions. [2021-11-20 06:27:15,130 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 519 transitions. Word has length 16 [2021-11-20 06:27:15,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:15,131 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 519 transitions. [2021-11-20 06:27:15,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:15,131 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 519 transitions. [2021-11-20 06:27:15,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:27:15,132 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:15,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:15,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 06:27:15,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 06:27:15,346 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:15,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:15,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2021-11-20 06:27:15,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:15,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951812677] [2021-11-20 06:27:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:15,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:15,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:15,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:15,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951812677] [2021-11-20 06:27:15,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951812677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:15,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:15,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:27:15,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626632795] [2021-11-20 06:27:15,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:15,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:27:15,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:15,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:27:15,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:27:15,411 INFO L87 Difference]: Start difference. First operand 347 states and 519 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:15,433 INFO L93 Difference]: Finished difference Result 356 states and 501 transitions. [2021-11-20 06:27:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:27:15,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 06:27:15,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:15,436 INFO L225 Difference]: With dead ends: 356 [2021-11-20 06:27:15,437 INFO L226 Difference]: Without dead ends: 356 [2021-11-20 06:27:15,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:27:15,438 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 26 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:15,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 114 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:27:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-11-20 06:27:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 343. [2021-11-20 06:27:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 296 states have (on average 1.5067567567567568) internal successors, (446), 323 states have internal predecessors, (446), 11 states have call successors, (11), 8 states have call predecessors, (11), 18 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2021-11-20 06:27:15,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 495 transitions. [2021-11-20 06:27:15,456 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 495 transitions. Word has length 18 [2021-11-20 06:27:15,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:15,457 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 495 transitions. [2021-11-20 06:27:15,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:27:15,457 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 495 transitions. [2021-11-20 06:27:15,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:27:15,458 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:15,458 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:15,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 06:27:15,459 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:15,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:15,460 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2021-11-20 06:27:15,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:15,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116511933] [2021-11-20 06:27:15,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:15,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:15,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:15,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:15,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:15,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:15,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116511933] [2021-11-20 06:27:15,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116511933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:15,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:27:15,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:27:15,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870518503] [2021-11-20 06:27:15,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:15,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:27:15,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:15,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:27:15,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:27:15,516 INFO L87 Difference]: Start difference. First operand 343 states and 495 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:15,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:15,581 INFO L93 Difference]: Finished difference Result 263 states and 368 transitions. [2021-11-20 06:27:15,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:27:15,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-20 06:27:15,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:15,584 INFO L225 Difference]: With dead ends: 263 [2021-11-20 06:27:15,585 INFO L226 Difference]: Without dead ends: 263 [2021-11-20 06:27:15,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:27:15,586 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 48 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:15,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 87 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:15,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-11-20 06:27:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-11-20 06:27:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 224 states have (on average 1.4910714285714286) internal successors, (334), 248 states have internal predecessors, (334), 8 states have call successors, (8), 6 states have call predecessors, (8), 13 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-11-20 06:27:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 368 transitions. [2021-11-20 06:27:15,597 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 368 transitions. Word has length 25 [2021-11-20 06:27:15,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:15,598 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 368 transitions. [2021-11-20 06:27:15,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 368 transitions. [2021-11-20 06:27:15,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:27:15,599 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:15,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:15,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 06:27:15,600 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:15,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2021-11-20 06:27:15,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:15,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851339198] [2021-11-20 06:27:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:15,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:15,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:15,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:15,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851339198] [2021-11-20 06:27:15,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851339198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:15,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206513970] [2021-11-20 06:27:15,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:15,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:15,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:15,767 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:15,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:27:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:15,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:27:15,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:16,215 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:27:16,215 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 22 treesize of output 24 [2021-11-20 06:27:16,221 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:27:16,221 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 21 treesize of output 17 [2021-11-20 06:27:16,341 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:16,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:16,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206513970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:16,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:16,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2021-11-20 06:27:16,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376310135] [2021-11-20 06:27:16,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:16,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:27:16,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:16,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:27:16,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:27:16,529 INFO L87 Difference]: Start difference. First operand 263 states and 368 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:27:17,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:17,292 INFO L93 Difference]: Finished difference Result 366 states and 477 transitions. [2021-11-20 06:27:17,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:27:17,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-20 06:27:17,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:17,296 INFO L225 Difference]: With dead ends: 366 [2021-11-20 06:27:17,296 INFO L226 Difference]: Without dead ends: 366 [2021-11-20 06:27:17,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:27:17,298 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 310 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:17,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 628 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 372 Invalid, 0 Unknown, 107 Unchecked, 0.3s Time] [2021-11-20 06:27:17,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-20 06:27:17,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 321. [2021-11-20 06:27:17,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 278 states have (on average 1.4964028776978417) internal successors, (416), 305 states have internal predecessors, (416), 8 states have call successors, (8), 7 states have call predecessors, (8), 17 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-11-20 06:27:17,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 450 transitions. [2021-11-20 06:27:17,312 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 450 transitions. Word has length 27 [2021-11-20 06:27:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:17,312 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 450 transitions. [2021-11-20 06:27:17,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:27:17,313 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 450 transitions. [2021-11-20 06:27:17,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 06:27:17,319 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:17,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:17,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:17,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:27:17,544 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:17,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:17,544 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2021-11-20 06:27:17,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:17,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162141668] [2021-11-20 06:27:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:17,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:17,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:17,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:17,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162141668] [2021-11-20 06:27:17,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162141668] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:17,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455734279] [2021-11-20 06:27:17,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:17,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:17,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:17,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:17,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:27:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:17,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:27:17,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:17,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:17,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455734279] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:17,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:17,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2021-11-20 06:27:17,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263565223] [2021-11-20 06:27:17,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:17,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:27:17,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:17,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:27:17,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:27:17,913 INFO L87 Difference]: Start difference. First operand 321 states and 450 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:18,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:18,029 INFO L93 Difference]: Finished difference Result 411 states and 555 transitions. [2021-11-20 06:27:18,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:27:18,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-11-20 06:27:18,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:18,032 INFO L225 Difference]: With dead ends: 411 [2021-11-20 06:27:18,032 INFO L226 Difference]: Without dead ends: 411 [2021-11-20 06:27:18,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:27:18,034 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 122 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:18,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 195 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:18,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-20 06:27:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 343. [2021-11-20 06:27:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 300 states have (on average 1.4866666666666666) internal successors, (446), 327 states have internal predecessors, (446), 8 states have call successors, (8), 7 states have call predecessors, (8), 17 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-11-20 06:27:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 480 transitions. [2021-11-20 06:27:18,048 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 480 transitions. Word has length 28 [2021-11-20 06:27:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:18,048 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 480 transitions. [2021-11-20 06:27:18,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 480 transitions. [2021-11-20 06:27:18,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:27:18,050 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:18,050 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:18,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:18,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 06:27:18,262 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:18,262 INFO L85 PathProgramCache]: Analyzing trace with hash -221078483, now seen corresponding path program 1 times [2021-11-20 06:27:18,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:18,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718076555] [2021-11-20 06:27:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:18,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:18,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:18,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718076555] [2021-11-20 06:27:18,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718076555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:18,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199784879] [2021-11-20 06:27:18,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:18,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:18,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:18,692 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:18,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:27:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:18,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:27:18,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:19,246 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:27:19,246 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 22 treesize of output 24 [2021-11-20 06:27:19,252 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:27:19,253 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 21 treesize of output 17 [2021-11-20 06:27:19,400 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 [2021-11-20 06:27:19,403 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 [2021-11-20 06:27:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:19,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:19,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199784879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:19,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:19,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2021-11-20 06:27:19,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290230277] [2021-11-20 06:27:19,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:19,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:27:19,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:19,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:27:19,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:27:19,607 INFO L87 Difference]: Start difference. First operand 343 states and 480 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:27:21,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:21,276 INFO L93 Difference]: Finished difference Result 479 states and 606 transitions. [2021-11-20 06:27:21,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 06:27:21,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-11-20 06:27:21,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:21,280 INFO L225 Difference]: With dead ends: 479 [2021-11-20 06:27:21,280 INFO L226 Difference]: Without dead ends: 479 [2021-11-20 06:27:21,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=449, Invalid=1713, Unknown=0, NotChecked=0, Total=2162 [2021-11-20 06:27:21,282 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 472 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:21,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 614 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 445 Invalid, 0 Unknown, 463 Unchecked, 0.4s Time] [2021-11-20 06:27:21,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-20 06:27:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 380. [2021-11-20 06:27:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 336 states have (on average 1.4613095238095237) internal successors, (491), 363 states have internal predecessors, (491), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:27:21,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 524 transitions. [2021-11-20 06:27:21,297 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 524 transitions. Word has length 29 [2021-11-20 06:27:21,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:21,298 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 524 transitions. [2021-11-20 06:27:21,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:27:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 524 transitions. [2021-11-20 06:27:21,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 06:27:21,301 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:21,302 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:21,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:21,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:27:21,523 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:21,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:21,523 INFO L85 PathProgramCache]: Analyzing trace with hash -253201523, now seen corresponding path program 1 times [2021-11-20 06:27:21,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:21,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93100663] [2021-11-20 06:27:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:21,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:21,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:21,609 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:27:21,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:21,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93100663] [2021-11-20 06:27:21,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93100663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:21,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749492510] [2021-11-20 06:27:21,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:21,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:21,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:21,611 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:21,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:27:21,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:21,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:27:21,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:27:21,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:21,965 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:27:21,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749492510] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:21,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:21,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-11-20 06:27:21,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153369134] [2021-11-20 06:27:21,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:21,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:27:21,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:21,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:27:21,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:27:21,969 INFO L87 Difference]: Start difference. First operand 380 states and 524 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:27:22,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:22,256 INFO L93 Difference]: Finished difference Result 423 states and 538 transitions. [2021-11-20 06:27:22,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:27:22,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-11-20 06:27:22,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:22,259 INFO L225 Difference]: With dead ends: 423 [2021-11-20 06:27:22,259 INFO L226 Difference]: Without dead ends: 423 [2021-11-20 06:27:22,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:27:22,262 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 393 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:22,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 219 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:27:22,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-20 06:27:22,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 380. [2021-11-20 06:27:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 336 states have (on average 1.4345238095238095) internal successors, (482), 363 states have internal predecessors, (482), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:27:22,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 515 transitions. [2021-11-20 06:27:22,277 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 515 transitions. Word has length 30 [2021-11-20 06:27:22,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:22,277 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 515 transitions. [2021-11-20 06:27:22,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:27:22,278 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 515 transitions. [2021-11-20 06:27:22,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 06:27:22,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:22,281 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:22,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:22,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:22,496 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:22,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:22,496 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2021-11-20 06:27:22,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:22,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798193139] [2021-11-20 06:27:22,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:22,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,579 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:27:22,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:22,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798193139] [2021-11-20 06:27:22,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798193139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:22,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465877778] [2021-11-20 06:27:22,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:22,581 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:22,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:22,582 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:22,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:27:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:22,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:27:22,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:27:22,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:27:22,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465877778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:22,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:22,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2021-11-20 06:27:22,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156527140] [2021-11-20 06:27:22,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:22,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:27:23,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:23,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:27:23,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:27:23,000 INFO L87 Difference]: Start difference. First operand 380 states and 515 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:27:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:23,412 INFO L93 Difference]: Finished difference Result 401 states and 511 transitions. [2021-11-20 06:27:23,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:27:23,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2021-11-20 06:27:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:23,415 INFO L225 Difference]: With dead ends: 401 [2021-11-20 06:27:23,415 INFO L226 Difference]: Without dead ends: 401 [2021-11-20 06:27:23,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:27:23,416 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 495 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:23,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 257 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:27:23,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-20 06:27:23,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 380. [2021-11-20 06:27:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 336 states have (on average 1.4077380952380953) internal successors, (473), 363 states have internal predecessors, (473), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:27:23,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 506 transitions. [2021-11-20 06:27:23,432 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 506 transitions. Word has length 31 [2021-11-20 06:27:23,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:23,433 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 506 transitions. [2021-11-20 06:27:23,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:27:23,433 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 506 transitions. [2021-11-20 06:27:23,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 06:27:23,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:23,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:23,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:23,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:27:23,655 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:23,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:23,656 INFO L85 PathProgramCache]: Analyzing trace with hash -759899757, now seen corresponding path program 1 times [2021-11-20 06:27:23,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:23,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148069503] [2021-11-20 06:27:23,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:23,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:23,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:23,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:23,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:23,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148069503] [2021-11-20 06:27:23,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148069503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:23,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560462155] [2021-11-20 06:27:23,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:23,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:23,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:23,844 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:23,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:27:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:23,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:27:23,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:24,277 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:27:24,278 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 22 treesize of output 24 [2021-11-20 06:27:24,298 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:27:24,298 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 21 treesize of output 17 [2021-11-20 06:27:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:24,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:24,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560462155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:24,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:24,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2021-11-20 06:27:24,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634319346] [2021-11-20 06:27:24,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:24,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:27:24,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:24,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:27:24,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:27:24,748 INFO L87 Difference]: Start difference. First operand 380 states and 506 transitions. Second operand has 16 states, 15 states have (on average 4.0) internal successors, (60), 12 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:27:25,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:25,485 INFO L93 Difference]: Finished difference Result 406 states and 514 transitions. [2021-11-20 06:27:25,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:27:25,486 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 12 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-20 06:27:25,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:25,488 INFO L225 Difference]: With dead ends: 406 [2021-11-20 06:27:25,488 INFO L226 Difference]: Without dead ends: 406 [2021-11-20 06:27:25,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:27:25,490 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 239 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:25,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 761 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 375 Invalid, 0 Unknown, 134 Unchecked, 0.3s Time] [2021-11-20 06:27:25,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-20 06:27:25,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 380. [2021-11-20 06:27:25,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 336 states have (on average 1.4047619047619047) internal successors, (472), 363 states have internal predecessors, (472), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:27:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 505 transitions. [2021-11-20 06:27:25,521 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 505 transitions. Word has length 33 [2021-11-20 06:27:25,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:25,522 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 505 transitions. [2021-11-20 06:27:25,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.0) internal successors, (60), 12 states have internal predecessors, (60), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:27:25,523 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 505 transitions. [2021-11-20 06:27:25,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:27:25,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:25,524 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:25,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:25,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 06:27:25,744 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:25,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:25,744 INFO L85 PathProgramCache]: Analyzing trace with hash -117381739, now seen corresponding path program 1 times [2021-11-20 06:27:25,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:25,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428100655] [2021-11-20 06:27:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:25,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:25,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:25,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:25,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428100655] [2021-11-20 06:27:25,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428100655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:25,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881878721] [2021-11-20 06:27:25,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:25,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:25,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:25,980 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:26,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:27:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:26,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:27:26,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:26,421 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:27:26,422 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 22 treesize of output 24 [2021-11-20 06:27:26,427 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:27:26,428 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 21 treesize of output 17 [2021-11-20 06:27:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:26,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:26,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881878721] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:26,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:26,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-11-20 06:27:26,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931682468] [2021-11-20 06:27:26,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:26,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:27:26,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:26,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:27:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:27:26,920 INFO L87 Difference]: Start difference. First operand 380 states and 505 transitions. Second operand has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:27:27,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:27,773 INFO L93 Difference]: Finished difference Result 414 states and 522 transitions. [2021-11-20 06:27:27,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:27:27,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-11-20 06:27:27,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:27,776 INFO L225 Difference]: With dead ends: 414 [2021-11-20 06:27:27,776 INFO L226 Difference]: Without dead ends: 414 [2021-11-20 06:27:27,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:27:27,778 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 358 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:27,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 682 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 414 Invalid, 0 Unknown, 135 Unchecked, 0.3s Time] [2021-11-20 06:27:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-20 06:27:27,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 383. [2021-11-20 06:27:27,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 339 states have (on average 1.40117994100295) internal successors, (475), 366 states have internal predecessors, (475), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:27:27,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 508 transitions. [2021-11-20 06:27:27,794 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 508 transitions. Word has length 35 [2021-11-20 06:27:27,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:27,795 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 508 transitions. [2021-11-20 06:27:27,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.764705882352941) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:27:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 508 transitions. [2021-11-20 06:27:27,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:27:27,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:27,796 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:27,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:28,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 06:27:28,014 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr9REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:28,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:28,015 INFO L85 PathProgramCache]: Analyzing trace with hash -119227180, now seen corresponding path program 1 times [2021-11-20 06:27:28,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:28,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115082667] [2021-11-20 06:27:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:28,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:28,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:28,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:28,113 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:28,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:28,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115082667] [2021-11-20 06:27:28,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115082667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:28,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435294002] [2021-11-20 06:27:28,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:28,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:28,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:28,115 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:28,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:27:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:28,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:27:28,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-20 06:27:28,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:28,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435294002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:28,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:28,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2021-11-20 06:27:28,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736353241] [2021-11-20 06:27:28,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:28,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:27:28,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:28,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:27:28,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:27:28,282 INFO L87 Difference]: Start difference. First operand 383 states and 508 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:28,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:28,318 INFO L93 Difference]: Finished difference Result 414 states and 531 transitions. [2021-11-20 06:27:28,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:27:28,319 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-11-20 06:27:28,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:28,322 INFO L225 Difference]: With dead ends: 414 [2021-11-20 06:27:28,322 INFO L226 Difference]: Without dead ends: 414 [2021-11-20 06:27:28,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:27:28,323 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 64 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:28,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 87 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:27:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-11-20 06:27:28,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 382. [2021-11-20 06:27:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 339 states have (on average 1.3775811209439528) internal successors, (467), 365 states have internal predecessors, (467), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:27:28,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 500 transitions. [2021-11-20 06:27:28,339 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 500 transitions. Word has length 35 [2021-11-20 06:27:28,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:28,340 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 500 transitions. [2021-11-20 06:27:28,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:28,340 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 500 transitions. [2021-11-20 06:27:28,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 06:27:28,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:28,341 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:28,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:28,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:28,568 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:28,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:28,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1388397336, now seen corresponding path program 1 times [2021-11-20 06:27:28,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:28,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387184794] [2021-11-20 06:27:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:28,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:28,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:28,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:28,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:28,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387184794] [2021-11-20 06:27:28,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387184794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:28,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146040616] [2021-11-20 06:27:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:28,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:28,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:28,765 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:28,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:27:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:28,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:27:28,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:29,175 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:27:29,175 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 22 treesize of output 24 [2021-11-20 06:27:29,180 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:27:29,180 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 21 treesize of output 17 [2021-11-20 06:27:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:29,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:29,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146040616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:29,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:29,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-11-20 06:27:29,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785744572] [2021-11-20 06:27:29,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:29,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:27:29,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:29,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:27:29,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:27:29,665 INFO L87 Difference]: Start difference. First operand 382 states and 500 transitions. Second operand has 18 states, 17 states have (on average 4.0) internal successors, (68), 14 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:27:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:30,477 INFO L93 Difference]: Finished difference Result 412 states and 513 transitions. [2021-11-20 06:27:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:27:30,478 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.0) internal successors, (68), 14 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-11-20 06:27:30,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:30,481 INFO L225 Difference]: With dead ends: 412 [2021-11-20 06:27:30,481 INFO L226 Difference]: Without dead ends: 412 [2021-11-20 06:27:30,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:27:30,484 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 388 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:30,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 683 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 398 Invalid, 0 Unknown, 175 Unchecked, 0.3s Time] [2021-11-20 06:27:30,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-20 06:27:30,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 379. [2021-11-20 06:27:30,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 336 states have (on average 1.3779761904761905) internal successors, (463), 362 states have internal predecessors, (463), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:27:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 496 transitions. [2021-11-20 06:27:30,506 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 496 transitions. Word has length 37 [2021-11-20 06:27:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:30,506 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 496 transitions. [2021-11-20 06:27:30,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.0) internal successors, (68), 14 states have internal predecessors, (68), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:27:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 496 transitions. [2021-11-20 06:27:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 06:27:30,507 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:30,507 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:30,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:30,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:30,724 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:30,724 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2021-11-20 06:27:30,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:30,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918873274] [2021-11-20 06:27:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:30,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:30,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:30,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:30,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918873274] [2021-11-20 06:27:30,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918873274] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:30,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786094934] [2021-11-20 06:27:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:30,795 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:30,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:30,796 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:30,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:27:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:30,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:27:30,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:30,964 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:30,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:31,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786094934] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:31,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:31,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2021-11-20 06:27:31,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806962913] [2021-11-20 06:27:31,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:31,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:27:31,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:31,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:27:31,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:31,050 INFO L87 Difference]: Start difference. First operand 379 states and 496 transitions. Second operand has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-20 06:27:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:31,138 INFO L93 Difference]: Finished difference Result 380 states and 494 transitions. [2021-11-20 06:27:31,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:27:31,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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 40 [2021-11-20 06:27:31,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:31,141 INFO L225 Difference]: With dead ends: 380 [2021-11-20 06:27:31,141 INFO L226 Difference]: Without dead ends: 380 [2021-11-20 06:27:31,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:27:31,142 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 82 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:31,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 70 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-20 06:27:31,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 377. [2021-11-20 06:27:31,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 336 states have (on average 1.3630952380952381) internal successors, (458), 360 states have internal predecessors, (458), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:27:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 491 transitions. [2021-11-20 06:27:31,155 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 491 transitions. Word has length 40 [2021-11-20 06:27:31,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:31,155 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 491 transitions. [2021-11-20 06:27:31,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 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) [2021-11-20 06:27:31,156 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 491 transitions. [2021-11-20 06:27:31,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:27:31,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:31,157 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:31,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:31,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:31,384 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:31,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1556115366, now seen corresponding path program 1 times [2021-11-20 06:27:31,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:31,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251486675] [2021-11-20 06:27:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:31,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:31,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:31,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:31,562 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:27:31,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:31,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251486675] [2021-11-20 06:27:31,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251486675] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:31,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117616610] [2021-11-20 06:27:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:31,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:31,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:31,568 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:31,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:27:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:31,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:27:31,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:31,940 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:27:31,944 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 22 treesize of output 24 [2021-11-20 06:27:31,950 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:27:31,951 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 21 treesize of output 17 [2021-11-20 06:27:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:32,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:32,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117616610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:32,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:32,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2021-11-20 06:27:32,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227400034] [2021-11-20 06:27:32,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:32,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:27:32,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:32,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:27:32,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:27:32,597 INFO L87 Difference]: Start difference. First operand 377 states and 491 transitions. Second operand has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 15 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:27:33,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:33,433 INFO L93 Difference]: Finished difference Result 425 states and 528 transitions. [2021-11-20 06:27:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:27:33,436 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 15 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-11-20 06:27:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:33,438 INFO L225 Difference]: With dead ends: 425 [2021-11-20 06:27:33,438 INFO L226 Difference]: Without dead ends: 425 [2021-11-20 06:27:33,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 06:27:33,441 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 288 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:33,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 758 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 338 Invalid, 0 Unknown, 208 Unchecked, 0.2s Time] [2021-11-20 06:27:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-20 06:27:33,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 391. [2021-11-20 06:27:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 350 states have (on average 1.36) internal successors, (476), 374 states have internal predecessors, (476), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:27:33,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 509 transitions. [2021-11-20 06:27:33,455 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 509 transitions. Word has length 41 [2021-11-20 06:27:33,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:33,456 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 509 transitions. [2021-11-20 06:27:33,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.470588235294118) internal successors, (76), 15 states have internal predecessors, (76), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:27:33,456 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 509 transitions. [2021-11-20 06:27:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:27:33,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:33,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:33,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:33,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:33,672 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:33,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:33,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2021-11-20 06:27:33,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:33,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209711910] [2021-11-20 06:27:33,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:33,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:33,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:33,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:33,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209711910] [2021-11-20 06:27:33,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209711910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:33,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209566457] [2021-11-20 06:27:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:33,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:33,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:33,754 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:33,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:27:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:33,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:27:33,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:33,903 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:33,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:33,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209566457] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:33,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:33,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2021-11-20 06:27:33,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705454436] [2021-11-20 06:27:33,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:33,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:27:33,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:33,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:27:33,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:33,992 INFO L87 Difference]: Start difference. First operand 391 states and 509 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2021-11-20 06:27:34,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:34,096 INFO L93 Difference]: Finished difference Result 392 states and 507 transitions. [2021-11-20 06:27:34,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:27:34,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 41 [2021-11-20 06:27:34,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:34,099 INFO L225 Difference]: With dead ends: 392 [2021-11-20 06:27:34,099 INFO L226 Difference]: Without dead ends: 392 [2021-11-20 06:27:34,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:27:34,100 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 78 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:34,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 50 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-20 06:27:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 389. [2021-11-20 06:27:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 350 states have (on average 1.3457142857142856) internal successors, (471), 372 states have internal predecessors, (471), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:27:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 504 transitions. [2021-11-20 06:27:34,115 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 504 transitions. Word has length 41 [2021-11-20 06:27:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:34,115 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 504 transitions. [2021-11-20 06:27:34,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2021-11-20 06:27:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 504 transitions. [2021-11-20 06:27:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 06:27:34,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:34,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:34,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:34,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 06:27:34,340 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:34,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:34,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2021-11-20 06:27:34,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:34,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138416216] [2021-11-20 06:27:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:34,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:34,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,400 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:34,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:34,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138416216] [2021-11-20 06:27:34,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138416216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:34,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681099194] [2021-11-20 06:27:34,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:34,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:34,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:34,404 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:34,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:27:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:34,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:27:34,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:34,509 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 [2021-11-20 06:27:34,573 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 06:27:34,573 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 17 treesize of output 21 [2021-11-20 06:27:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:34,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:34,828 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:34,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681099194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:34,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:34,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-20 06:27:34,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364401045] [2021-11-20 06:27:34,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:34,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:27:34,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:34,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:27:34,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:27:34,832 INFO L87 Difference]: Start difference. First operand 389 states and 504 transitions. Second operand has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:27:34,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:34,971 INFO L93 Difference]: Finished difference Result 412 states and 523 transitions. [2021-11-20 06:27:34,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:27:34,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (4), 4 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 42 [2021-11-20 06:27:34,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:34,975 INFO L225 Difference]: With dead ends: 412 [2021-11-20 06:27:34,975 INFO L226 Difference]: Without dead ends: 412 [2021-11-20 06:27:34,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:27:34,982 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 69 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:34,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 201 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 120 Unchecked, 0.1s Time] [2021-11-20 06:27:34,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-11-20 06:27:34,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 392. [2021-11-20 06:27:34,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 353 states have (on average 1.339943342776204) internal successors, (473), 375 states have internal predecessors, (473), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:27:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 506 transitions. [2021-11-20 06:27:34,999 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 506 transitions. Word has length 42 [2021-11-20 06:27:35,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:35,000 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 506 transitions. [2021-11-20 06:27:35,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:27:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 506 transitions. [2021-11-20 06:27:35,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 06:27:35,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:35,003 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:35,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:35,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:35,224 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:35,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash -776403300, now seen corresponding path program 2 times [2021-11-20 06:27:35,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:35,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964433480] [2021-11-20 06:27:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:35,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:35,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:35,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:35,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964433480] [2021-11-20 06:27:35,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964433480] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:35,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303073780] [2021-11-20 06:27:35,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:27:35,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:35,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:35,293 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:35,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 06:27:35,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:27:35,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:35,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:27:35,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:27:35,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:35,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303073780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:35,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:35,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-20 06:27:35,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750049052] [2021-11-20 06:27:35,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:35,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:27:35,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:35,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:27:35,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:27:35,466 INFO L87 Difference]: Start difference. First operand 392 states and 506 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:35,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:35,496 INFO L93 Difference]: Finished difference Result 464 states and 565 transitions. [2021-11-20 06:27:35,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:27:35,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-11-20 06:27:35,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:35,499 INFO L225 Difference]: With dead ends: 464 [2021-11-20 06:27:35,499 INFO L226 Difference]: Without dead ends: 464 [2021-11-20 06:27:35,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:27:35,500 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 63 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:35,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 192 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:27:35,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-20 06:27:35,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 380. [2021-11-20 06:27:35,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 341 states have (on average 1.3020527859237536) internal successors, (444), 363 states have internal predecessors, (444), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:27:35,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 477 transitions. [2021-11-20 06:27:35,514 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 477 transitions. Word has length 43 [2021-11-20 06:27:35,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:35,514 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 477 transitions. [2021-11-20 06:27:35,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:35,514 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 477 transitions. [2021-11-20 06:27:35,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 06:27:35,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:35,515 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:35,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:35,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 06:27:35,744 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:35,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1649835933, now seen corresponding path program 1 times [2021-11-20 06:27:35,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:35,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96416562] [2021-11-20 06:27:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:35,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:35,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:27:35,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:35,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96416562] [2021-11-20 06:27:35,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96416562] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:35,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122950103] [2021-11-20 06:27:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:35,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:35,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:35,896 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:35,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 06:27:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:35,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:27:35,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:36,315 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:27:36,316 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 22 treesize of output 24 [2021-11-20 06:27:36,321 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:27:36,321 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 21 treesize of output 17 [2021-11-20 06:27:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:36,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:37,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122950103] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:37,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:37,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2021-11-20 06:27:37,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833887424] [2021-11-20 06:27:37,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:37,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:27:37,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:37,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:27:37,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:27:37,030 INFO L87 Difference]: Start difference. First operand 380 states and 477 transitions. Second operand has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 15 states have internal predecessors, (80), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:27:37,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:37,772 INFO L93 Difference]: Finished difference Result 402 states and 490 transitions. [2021-11-20 06:27:37,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:27:37,773 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 15 states have internal predecessors, (80), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2021-11-20 06:27:37,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:37,775 INFO L225 Difference]: With dead ends: 402 [2021-11-20 06:27:37,775 INFO L226 Difference]: Without dead ends: 402 [2021-11-20 06:27:37,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 06:27:37,777 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 239 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:37,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 692 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 308 Invalid, 0 Unknown, 189 Unchecked, 0.2s Time] [2021-11-20 06:27:37,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-11-20 06:27:37,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 371. [2021-11-20 06:27:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 332 states have (on average 1.3042168674698795) internal successors, (433), 354 states have internal predecessors, (433), 8 states have call successors, (8), 8 states have call predecessors, (8), 18 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:27:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 466 transitions. [2021-11-20 06:27:37,789 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 466 transitions. Word has length 43 [2021-11-20 06:27:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:37,789 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 466 transitions. [2021-11-20 06:27:37,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 15 states have internal predecessors, (80), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:27:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 466 transitions. [2021-11-20 06:27:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 06:27:37,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:37,790 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:37,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:38,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 06:27:38,016 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:38,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:38,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1458472979, now seen corresponding path program 1 times [2021-11-20 06:27:38,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:38,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637569541] [2021-11-20 06:27:38,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:38,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:38,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:38,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:27:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:27:38,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:38,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637569541] [2021-11-20 06:27:38,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637569541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:38,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703149602] [2021-11-20 06:27:38,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:38,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:38,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:38,158 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:38,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 06:27:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:38,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 06:27:38,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:38,878 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:27:38,879 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 22 treesize of output 24 [2021-11-20 06:27:38,883 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:27:38,883 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 21 treesize of output 17 [2021-11-20 06:27:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:27:38,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:39,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703149602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:39,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:39,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2021-11-20 06:27:39,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803262165] [2021-11-20 06:27:39,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:39,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:27:39,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:39,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:27:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:27:39,102 INFO L87 Difference]: Start difference. First operand 371 states and 466 transitions. Second operand has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:27:39,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:39,566 INFO L93 Difference]: Finished difference Result 451 states and 550 transitions. [2021-11-20 06:27:39,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:27:39,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2021-11-20 06:27:39,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:39,569 INFO L225 Difference]: With dead ends: 451 [2021-11-20 06:27:39,569 INFO L226 Difference]: Without dead ends: 451 [2021-11-20 06:27:39,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:27:39,570 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 261 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:39,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 384 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 266 Invalid, 0 Unknown, 218 Unchecked, 0.2s Time] [2021-11-20 06:27:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-11-20 06:27:39,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 418. [2021-11-20 06:27:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 377 states have (on average 1.312997347480106) internal successors, (495), 399 states have internal predecessors, (495), 9 states have call successors, (9), 9 states have call predecessors, (9), 19 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2021-11-20 06:27:39,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 530 transitions. [2021-11-20 06:27:39,584 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 530 transitions. Word has length 48 [2021-11-20 06:27:39,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:39,585 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 530 transitions. [2021-11-20 06:27:39,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.357142857142857) internal successors, (61), 11 states have internal predecessors, (61), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:27:39,585 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 530 transitions. [2021-11-20 06:27:39,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 06:27:39,586 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:39,586 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:39,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:39,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 06:27:39,800 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:39,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:39,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1063114569, now seen corresponding path program 2 times [2021-11-20 06:27:39,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:39,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100284610] [2021-11-20 06:27:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:39,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:39,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:39,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:39,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:27:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:27:39,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:39,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100284610] [2021-11-20 06:27:39,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100284610] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:39,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176037858] [2021-11-20 06:27:39,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:27:39,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:39,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:39,904 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:39,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 06:27:40,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:27:40,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:40,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:27:40,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:27:40,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:40,281 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 25 treesize of output 21 [2021-11-20 06:27:40,351 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 18 treesize of output 14 [2021-11-20 06:27:40,467 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 23 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:27:40,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176037858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:40,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:40,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 7] total 16 [2021-11-20 06:27:40,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247342307] [2021-11-20 06:27:40,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:40,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:27:40,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:40,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:27:40,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:27:40,469 INFO L87 Difference]: Start difference. First operand 418 states and 530 transitions. Second operand has 17 states, 16 states have (on average 6.4375) internal successors, (103), 15 states have internal predecessors, (103), 3 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 06:27:40,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:40,897 INFO L93 Difference]: Finished difference Result 541 states and 645 transitions. [2021-11-20 06:27:40,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:27:40,897 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 6.4375) internal successors, (103), 15 states have internal predecessors, (103), 3 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 48 [2021-11-20 06:27:40,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:40,900 INFO L225 Difference]: With dead ends: 541 [2021-11-20 06:27:40,900 INFO L226 Difference]: Without dead ends: 541 [2021-11-20 06:27:40,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:27:40,901 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 438 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:40,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 253 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:27:40,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-20 06:27:40,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 418. [2021-11-20 06:27:40,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 377 states have (on average 1.297082228116711) internal successors, (489), 399 states have internal predecessors, (489), 9 states have call successors, (9), 9 states have call predecessors, (9), 19 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2021-11-20 06:27:40,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 524 transitions. [2021-11-20 06:27:40,914 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 524 transitions. Word has length 48 [2021-11-20 06:27:40,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:40,914 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 524 transitions. [2021-11-20 06:27:40,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 6.4375) internal successors, (103), 15 states have internal predecessors, (103), 3 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-20 06:27:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 524 transitions. [2021-11-20 06:27:40,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 06:27:40,916 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:40,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:40,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:41,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 06:27:41,131 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:41,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:41,132 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2021-11-20 06:27:41,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:41,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173885375] [2021-11-20 06:27:41,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:41,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:41,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:27:41,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:41,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173885375] [2021-11-20 06:27:41,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173885375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:41,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924756265] [2021-11-20 06:27:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:41,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:41,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:41,183 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:41,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 06:27:41,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:41,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:27:41,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 06:27:41,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:41,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924756265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:41,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:41,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-20 06:27:41,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679569688] [2021-11-20 06:27:41,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:41,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:27:41,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:41,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:27:41,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:41,342 INFO L87 Difference]: Start difference. First operand 418 states and 524 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:41,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:41,349 INFO L93 Difference]: Finished difference Result 437 states and 540 transitions. [2021-11-20 06:27:41,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:27:41,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-11-20 06:27:41,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:41,351 INFO L225 Difference]: With dead ends: 437 [2021-11-20 06:27:41,352 INFO L226 Difference]: Without dead ends: 437 [2021-11-20 06:27:41,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:41,353 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 13 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:41,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 108 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:27:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-11-20 06:27:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 417. [2021-11-20 06:27:41,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 377 states have (on average 1.2864721485411141) internal successors, (485), 398 states have internal predecessors, (485), 9 states have call successors, (9), 9 states have call predecessors, (9), 19 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2021-11-20 06:27:41,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 520 transitions. [2021-11-20 06:27:41,368 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 520 transitions. Word has length 47 [2021-11-20 06:27:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:41,368 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 520 transitions. [2021-11-20 06:27:41,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 520 transitions. [2021-11-20 06:27:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 06:27:41,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:41,369 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:41,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:41,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 06:27:41,584 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:41,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash 296907458, now seen corresponding path program 1 times [2021-11-20 06:27:41,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:41,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901041791] [2021-11-20 06:27:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:41,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:41,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:41,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:27:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:27:41,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:41,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901041791] [2021-11-20 06:27:41,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901041791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:41,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097436443] [2021-11-20 06:27:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:41,690 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:41,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:41,692 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:41,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 06:27:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:41,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:27:41,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:41,862 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:41,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:41,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097436443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:41,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:41,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2021-11-20 06:27:41,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301070345] [2021-11-20 06:27:41,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:42,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:27:42,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:42,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:27:42,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:27:42,001 INFO L87 Difference]: Start difference. First operand 417 states and 520 transitions. Second operand has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:27:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:42,233 INFO L93 Difference]: Finished difference Result 386 states and 464 transitions. [2021-11-20 06:27:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:27:42,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2021-11-20 06:27:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:42,235 INFO L225 Difference]: With dead ends: 386 [2021-11-20 06:27:42,235 INFO L226 Difference]: Without dead ends: 386 [2021-11-20 06:27:42,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:27:42,235 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 188 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:42,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 145 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:42,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-20 06:27:42,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 367. [2021-11-20 06:27:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 333 states have (on average 1.2702702702702702) internal successors, (423), 350 states have internal predecessors, (423), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-11-20 06:27:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 448 transitions. [2021-11-20 06:27:42,246 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 448 transitions. Word has length 48 [2021-11-20 06:27:42,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:42,246 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 448 transitions. [2021-11-20 06:27:42,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.636363636363637) internal successors, (73), 10 states have internal predecessors, (73), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:27:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 448 transitions. [2021-11-20 06:27:42,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 06:27:42,247 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:42,247 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:42,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:42,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:42,464 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:42,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1661228621, now seen corresponding path program 1 times [2021-11-20 06:27:42,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:42,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757101067] [2021-11-20 06:27:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:42,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:42,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:27:42,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:42,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757101067] [2021-11-20 06:27:42,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757101067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:42,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238257940] [2021-11-20 06:27:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:42,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:42,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:42,513 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:42,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 06:27:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:42,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:27:42,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 06:27:42,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:42,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238257940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:42,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:42,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2021-11-20 06:27:42,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537692233] [2021-11-20 06:27:42,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:42,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:27:42,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:42,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:27:42,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:27:42,697 INFO L87 Difference]: Start difference. First operand 367 states and 448 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:42,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:42,728 INFO L93 Difference]: Finished difference Result 384 states and 462 transitions. [2021-11-20 06:27:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:27:42,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-11-20 06:27:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:42,730 INFO L225 Difference]: With dead ends: 384 [2021-11-20 06:27:42,731 INFO L226 Difference]: Without dead ends: 384 [2021-11-20 06:27:42,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:27:42,731 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 33 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:42,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 90 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:27:42,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-11-20 06:27:42,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 366. [2021-11-20 06:27:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 333 states have (on average 1.2582582582582582) internal successors, (419), 349 states have internal predecessors, (419), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-11-20 06:27:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 444 transitions. [2021-11-20 06:27:42,741 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 444 transitions. Word has length 48 [2021-11-20 06:27:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:42,742 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 444 transitions. [2021-11-20 06:27:42,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:42,742 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 444 transitions. [2021-11-20 06:27:42,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 06:27:42,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:42,743 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:42,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-20 06:27:42,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:42,964 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:42,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:42,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1433195828, now seen corresponding path program 1 times [2021-11-20 06:27:42,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:42,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582781624] [2021-11-20 06:27:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:42,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:42,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:43,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:43,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:27:43,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:43,330 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:27:43,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:43,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582781624] [2021-11-20 06:27:43,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582781624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:43,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779389627] [2021-11-20 06:27:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:43,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:43,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:43,332 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:43,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 06:27:43,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:43,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 06:27:43,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:44,093 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:27:44,093 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 22 treesize of output 24 [2021-11-20 06:27:44,098 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:27:44,099 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 21 treesize of output 17 [2021-11-20 06:27:44,206 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 [2021-11-20 06:27:44,208 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 [2021-11-20 06:27:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:27:44,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:44,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779389627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:44,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:44,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2021-11-20 06:27:44,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643598583] [2021-11-20 06:27:44,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:44,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 06:27:44,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:44,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 06:27:44,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:27:44,430 INFO L87 Difference]: Start difference. First operand 366 states and 444 transitions. Second operand has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:27:45,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:45,029 INFO L93 Difference]: Finished difference Result 377 states and 451 transitions. [2021-11-20 06:27:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:27:45,029 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2021-11-20 06:27:45,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:45,031 INFO L225 Difference]: With dead ends: 377 [2021-11-20 06:27:45,031 INFO L226 Difference]: Without dead ends: 377 [2021-11-20 06:27:45,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 06:27:45,033 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 225 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:45,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 424 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 153 Invalid, 0 Unknown, 165 Unchecked, 0.2s Time] [2021-11-20 06:27:45,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-20 06:27:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 366. [2021-11-20 06:27:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 333 states have (on average 1.2552552552552552) internal successors, (418), 349 states have internal predecessors, (418), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-11-20 06:27:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 443 transitions. [2021-11-20 06:27:45,042 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 443 transitions. Word has length 50 [2021-11-20 06:27:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:45,043 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 443 transitions. [2021-11-20 06:27:45,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 15 states have internal predecessors, (67), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:27:45,043 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 443 transitions. [2021-11-20 06:27:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 06:27:45,044 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:45,044 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:45,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:45,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-20 06:27:45,260 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:45,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:45,260 INFO L85 PathProgramCache]: Analyzing trace with hash 549114134, now seen corresponding path program 2 times [2021-11-20 06:27:45,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:45,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567759950] [2021-11-20 06:27:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:45,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:45,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:45,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:27:45,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:27:45,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:45,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567759950] [2021-11-20 06:27:45,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567759950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:45,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194296238] [2021-11-20 06:27:45,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:27:45,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:45,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:45,740 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:45,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 06:27:45,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:27:45,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:27:45,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:27:45,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:46,259 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 [2021-11-20 06:27:46,262 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 [2021-11-20 06:27:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:27:46,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:46,403 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 25 [2021-11-20 06:27:46,406 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 25 treesize of output 21 [2021-11-20 06:27:46,626 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-20 06:27:46,627 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 21 treesize of output 20 [2021-11-20 06:27:46,669 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-20 06:27:46,670 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 15 treesize of output 9 [2021-11-20 06:27:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 06:27:46,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194296238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:46,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:46,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 8] total 29 [2021-11-20 06:27:46,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575936409] [2021-11-20 06:27:46,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:46,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 06:27:46,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:46,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 06:27:46,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:27:46,750 INFO L87 Difference]: Start difference. First operand 366 states and 443 transitions. Second operand has 30 states, 28 states have (on average 4.464285714285714) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 06:27:47,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:47,445 INFO L93 Difference]: Finished difference Result 443 states and 515 transitions. [2021-11-20 06:27:47,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:27:47,446 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 4.464285714285714) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 50 [2021-11-20 06:27:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:47,448 INFO L225 Difference]: With dead ends: 443 [2021-11-20 06:27:47,448 INFO L226 Difference]: Without dead ends: 443 [2021-11-20 06:27:47,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=1217, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 06:27:47,450 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 896 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:47,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 183 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:27:47,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-11-20 06:27:47,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 366. [2021-11-20 06:27:47,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 333 states have (on average 1.2462462462462462) internal successors, (415), 349 states have internal predecessors, (415), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-11-20 06:27:47,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 440 transitions. [2021-11-20 06:27:47,460 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 440 transitions. Word has length 50 [2021-11-20 06:27:47,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:47,461 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 440 transitions. [2021-11-20 06:27:47,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 4.464285714285714) internal successors, (125), 26 states have internal predecessors, (125), 7 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-20 06:27:47,461 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 440 transitions. [2021-11-20 06:27:47,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 06:27:47,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:47,462 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:47,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:47,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-20 06:27:47,688 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:47,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:47,688 INFO L85 PathProgramCache]: Analyzing trace with hash -41520225, now seen corresponding path program 1 times [2021-11-20 06:27:47,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:47,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614527636] [2021-11-20 06:27:47,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:47,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:47,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:47,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:47,727 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:27:47,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:47,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614527636] [2021-11-20 06:27:47,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614527636] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:47,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598804327] [2021-11-20 06:27:47,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:47,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:47,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:47,729 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:47,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 06:27:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:47,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:27:47,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 06:27:47,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:47,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598804327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:47,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:47,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-20 06:27:47,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378001356] [2021-11-20 06:27:47,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:47,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:27:47,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:47,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:27:47,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:47,885 INFO L87 Difference]: Start difference. First operand 366 states and 440 transitions. Second operand has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:47,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:47,898 INFO L93 Difference]: Finished difference Result 383 states and 454 transitions. [2021-11-20 06:27:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:27:47,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-11-20 06:27:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:47,901 INFO L225 Difference]: With dead ends: 383 [2021-11-20 06:27:47,901 INFO L226 Difference]: Without dead ends: 383 [2021-11-20 06:27:47,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:27:47,902 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:47,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 105 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:27:47,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-20 06:27:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 365. [2021-11-20 06:27:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 333 states have (on average 1.2342342342342343) internal successors, (411), 348 states have internal predecessors, (411), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-11-20 06:27:47,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 436 transitions. [2021-11-20 06:27:47,911 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 436 transitions. Word has length 49 [2021-11-20 06:27:47,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:47,911 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 436 transitions. [2021-11-20 06:27:47,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 14.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:47,912 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 436 transitions. [2021-11-20 06:27:47,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 06:27:47,912 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:47,913 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:47,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:48,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-20 06:27:48,128 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:48,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:48,128 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2021-11-20 06:27:48,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:48,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231763196] [2021-11-20 06:27:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:48,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:48,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:48,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:27:48,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:48,197 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:27:48,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:48,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231763196] [2021-11-20 06:27:48,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231763196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:48,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675661953] [2021-11-20 06:27:48,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:48,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:48,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:48,213 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:48,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 06:27:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:48,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:27:48,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:48,440 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:27:48,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:48,702 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:27:48,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675661953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:48,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:48,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-11-20 06:27:48,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501727430] [2021-11-20 06:27:48,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:48,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:27:48,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:48,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:27:48,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:27:48,705 INFO L87 Difference]: Start difference. First operand 365 states and 436 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:27:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:48,956 INFO L93 Difference]: Finished difference Result 387 states and 449 transitions. [2021-11-20 06:27:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:27:48,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2021-11-20 06:27:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:48,959 INFO L225 Difference]: With dead ends: 387 [2021-11-20 06:27:48,959 INFO L226 Difference]: Without dead ends: 387 [2021-11-20 06:27:48,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:27:48,960 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 292 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:48,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 171 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:27:48,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-20 06:27:48,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 365. [2021-11-20 06:27:48,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 333 states have (on average 1.2252252252252251) internal successors, (408), 348 states have internal predecessors, (408), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2021-11-20 06:27:48,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 433 transitions. [2021-11-20 06:27:48,969 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 433 transitions. Word has length 51 [2021-11-20 06:27:48,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:48,970 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 433 transitions. [2021-11-20 06:27:48,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 1 states have call successors, (8), 5 states have call predecessors, (8), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:27:48,970 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 433 transitions. [2021-11-20 06:27:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 06:27:48,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:48,971 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:49,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:49,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-20 06:27:49,187 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:49,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:49,187 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2021-11-20 06:27:49,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:49,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123094173] [2021-11-20 06:27:49,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:49,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:49,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:49,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:27:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:27:49,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:49,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123094173] [2021-11-20 06:27:49,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123094173] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:49,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470458367] [2021-11-20 06:27:49,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:49,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:49,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:49,334 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:49,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 06:27:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:49,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 06:27:49,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:49,559 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:27:49,559 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 11 treesize of output 11 [2021-11-20 06:27:49,700 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 06:27:49,700 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 17 treesize of output 21 [2021-11-20 06:27:49,850 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-20 06:27:49,850 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 3 case distinctions, treesize of input 21 treesize of output 34 [2021-11-20 06:27:50,111 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:50,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:50,148 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:27:50,148 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 51 treesize of output 46 [2021-11-20 06:27:50,377 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:27:50,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2021-11-20 06:27:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:50,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470458367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:50,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:50,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2021-11-20 06:27:50,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743259633] [2021-11-20 06:27:50,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:50,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:27:50,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:50,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:27:50,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:27:50,599 INFO L87 Difference]: Start difference. First operand 365 states and 433 transitions. Second operand has 28 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:27:51,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:51,078 INFO L93 Difference]: Finished difference Result 406 states and 463 transitions. [2021-11-20 06:27:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 06:27:51,078 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 51 [2021-11-20 06:27:51,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:51,097 INFO L225 Difference]: With dead ends: 406 [2021-11-20 06:27:51,097 INFO L226 Difference]: Without dead ends: 406 [2021-11-20 06:27:51,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 06:27:51,098 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 385 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:51,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [385 Valid, 465 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 404 Invalid, 0 Unknown, 165 Unchecked, 0.2s Time] [2021-11-20 06:27:51,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-11-20 06:27:51,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 372. [2021-11-20 06:27:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 341 states have (on average 1.219941348973607) internal successors, (416), 355 states have internal predecessors, (416), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-20 06:27:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 438 transitions. [2021-11-20 06:27:51,110 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 438 transitions. Word has length 51 [2021-11-20 06:27:51,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:51,110 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 438 transitions. [2021-11-20 06:27:51,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 5.076923076923077) internal successors, (132), 26 states have internal predecessors, (132), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:27:51,110 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 438 transitions. [2021-11-20 06:27:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 06:27:51,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:51,111 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:51,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:51,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-20 06:27:51,328 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:51,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:51,328 INFO L85 PathProgramCache]: Analyzing trace with hash -563187968, now seen corresponding path program 1 times [2021-11-20 06:27:51,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:51,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077677997] [2021-11-20 06:27:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:51,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:51,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:51,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:27:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:27:51,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:51,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077677997] [2021-11-20 06:27:51,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077677997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:51,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130303255] [2021-11-20 06:27:51,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:51,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:51,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:51,444 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:51,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 06:27:51,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:51,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:27:51,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:51,672 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:27:51,673 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 29 treesize of output 31 [2021-11-20 06:27:51,701 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:27:51,701 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 28 treesize of output 24 [2021-11-20 06:27:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:27:51,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:51,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130303255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:51,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:51,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 14 [2021-11-20 06:27:51,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192816351] [2021-11-20 06:27:51,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:51,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:27:51,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:51,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:27:51,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:27:51,886 INFO L87 Difference]: Start difference. First operand 372 states and 438 transitions. Second operand has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:27:52,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:52,011 INFO L93 Difference]: Finished difference Result 432 states and 500 transitions. [2021-11-20 06:27:52,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:27:52,011 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 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 51 [2021-11-20 06:27:52,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:52,013 INFO L225 Difference]: With dead ends: 432 [2021-11-20 06:27:52,013 INFO L226 Difference]: Without dead ends: 432 [2021-11-20 06:27:52,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:27:52,014 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 145 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:52,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 110 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 61 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2021-11-20 06:27:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-11-20 06:27:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 372. [2021-11-20 06:27:52,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 341 states have (on average 1.217008797653959) internal successors, (415), 355 states have internal predecessors, (415), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-20 06:27:52,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 437 transitions. [2021-11-20 06:27:52,024 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 437 transitions. Word has length 51 [2021-11-20 06:27:52,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:52,025 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 437 transitions. [2021-11-20 06:27:52,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:27:52,025 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 437 transitions. [2021-11-20 06:27:52,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 06:27:52,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:52,026 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:52,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:52,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-20 06:27:52,240 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:52,240 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2021-11-20 06:27:52,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:52,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235173255] [2021-11-20 06:27:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:52,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:52,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:27:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:27:52,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:52,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235173255] [2021-11-20 06:27:52,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235173255] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:52,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381938099] [2021-11-20 06:27:52,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:52,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:52,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:52,350 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:52,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 06:27:52,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:52,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:27:52,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:27:52,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:27:52,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381938099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:52,929 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:52,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2021-11-20 06:27:52,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543260137] [2021-11-20 06:27:52,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:52,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:27:52,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:52,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:27:52,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:27:52,932 INFO L87 Difference]: Start difference. First operand 372 states and 437 transitions. Second operand has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 06:27:53,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:53,369 INFO L93 Difference]: Finished difference Result 395 states and 455 transitions. [2021-11-20 06:27:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:27:53,371 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 52 [2021-11-20 06:27:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:53,373 INFO L225 Difference]: With dead ends: 395 [2021-11-20 06:27:53,373 INFO L226 Difference]: Without dead ends: 395 [2021-11-20 06:27:53,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:27:53,374 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 318 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:53,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 365 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:27:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-11-20 06:27:53,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 371. [2021-11-20 06:27:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 341 states have (on average 1.2023460410557185) internal successors, (410), 354 states have internal predecessors, (410), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-20 06:27:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 432 transitions. [2021-11-20 06:27:53,384 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 432 transitions. Word has length 52 [2021-11-20 06:27:53,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:53,385 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 432 transitions. [2021-11-20 06:27:53,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 9 states have internal predecessors, (50), 3 states have call successors, (9), 6 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-20 06:27:53,385 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 432 transitions. [2021-11-20 06:27:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 06:27:53,386 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:53,386 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:53,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:53,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-20 06:27:53,600 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:53,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:53,600 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2021-11-20 06:27:53,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:53,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046387475] [2021-11-20 06:27:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:53,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:53,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:53,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:27:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:27:54,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:54,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046387475] [2021-11-20 06:27:54,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046387475] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:54,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17690111] [2021-11-20 06:27:54,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:54,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:54,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:54,112 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:54,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 06:27:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:54,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 06:27:54,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:54,392 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:27:54,393 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 11 treesize of output 11 [2021-11-20 06:27:54,632 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-20 06:27:54,632 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 [2021-11-20 06:27:54,824 INFO L354 Elim1Store]: treesize reduction 40, result has 40.3 percent of original size [2021-11-20 06:27:54,824 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 3 case distinctions, treesize of input 29 treesize of output 46 [2021-11-20 06:27:55,184 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 24 treesize of output 12 [2021-11-20 06:27:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:55,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:55,312 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-20 06:27:55,313 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 59 treesize of output 52 [2021-11-20 06:27:55,603 INFO L354 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2021-11-20 06:27:55,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 72 [2021-11-20 06:27:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:27:55,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17690111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:27:55,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:27:55,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 46 [2021-11-20 06:27:55,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950884900] [2021-11-20 06:27:55,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:55,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 06:27:55,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:55,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 06:27:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2021-11-20 06:27:55,930 INFO L87 Difference]: Start difference. First operand 371 states and 432 transitions. Second operand has 48 states, 44 states have (on average 3.1818181818181817) internal successors, (140), 38 states have internal predecessors, (140), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:27:57,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:57,944 INFO L93 Difference]: Finished difference Result 523 states and 579 transitions. [2021-11-20 06:27:57,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-20 06:27:57,944 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 44 states have (on average 3.1818181818181817) internal successors, (140), 38 states have internal predecessors, (140), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2021-11-20 06:27:57,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:57,947 INFO L225 Difference]: With dead ends: 523 [2021-11-20 06:27:57,947 INFO L226 Difference]: Without dead ends: 523 [2021-11-20 06:27:57,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2323 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1022, Invalid=6118, Unknown=0, NotChecked=0, Total=7140 [2021-11-20 06:27:57,951 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 880 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 983 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:57,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 983 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1577 Invalid, 0 Unknown, 233 Unchecked, 0.8s Time] [2021-11-20 06:27:57,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-20 06:27:57,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 428. [2021-11-20 06:27:57,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 395 states have (on average 1.2126582278481013) internal successors, (479), 409 states have internal predecessors, (479), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-11-20 06:27:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 504 transitions. [2021-11-20 06:27:57,962 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 504 transitions. Word has length 52 [2021-11-20 06:27:57,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:57,962 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 504 transitions. [2021-11-20 06:27:57,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 44 states have (on average 3.1818181818181817) internal successors, (140), 38 states have internal predecessors, (140), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:27:57,963 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 504 transitions. [2021-11-20 06:27:57,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 06:27:57,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:57,964 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:57,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:58,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:58,178 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:58,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:58,178 INFO L85 PathProgramCache]: Analyzing trace with hash 21635793, now seen corresponding path program 1 times [2021-11-20 06:27:58,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:58,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724112867] [2021-11-20 06:27:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:58,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:58,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:58,243 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:27:58,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:58,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724112867] [2021-11-20 06:27:58,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724112867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:58,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168897089] [2021-11-20 06:27:58,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:58,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:58,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:58,244 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:58,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 06:27:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:58,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:27:58,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 06:27:58,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:27:58,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168897089] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:27:58,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:27:58,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-20 06:27:58,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808841527] [2021-11-20 06:27:58,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:27:58,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:27:58,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:58,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:27:58,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:27:58,395 INFO L87 Difference]: Start difference. First operand 428 states and 504 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:58,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:27:58,398 INFO L93 Difference]: Finished difference Result 372 states and 426 transitions. [2021-11-20 06:27:58,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:27:58,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-11-20 06:27:58,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:27:58,400 INFO L225 Difference]: With dead ends: 372 [2021-11-20 06:27:58,400 INFO L226 Difference]: Without dead ends: 372 [2021-11-20 06:27:58,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:27:58,401 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 4 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:27:58,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 96 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:27:58,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-11-20 06:27:58,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 349. [2021-11-20 06:27:58,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 322 states have (on average 1.18944099378882) internal successors, (383), 332 states have internal predecessors, (383), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2021-11-20 06:27:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 403 transitions. [2021-11-20 06:27:58,409 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 403 transitions. Word has length 52 [2021-11-20 06:27:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:27:58,410 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 403 transitions. [2021-11-20 06:27:58,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:27:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 403 transitions. [2021-11-20 06:27:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 06:27:58,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:27:58,411 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:27:58,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-20 06:27:58,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 06:27:58,624 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:27:58,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:27:58,624 INFO L85 PathProgramCache]: Analyzing trace with hash -2076245838, now seen corresponding path program 1 times [2021-11-20 06:27:58,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:27:58,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630075744] [2021-11-20 06:27:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:58,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:27:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:58,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:27:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:58,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:27:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:58,740 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 06:27:58,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:27:58,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630075744] [2021-11-20 06:27:58,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630075744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:58,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892940141] [2021-11-20 06:27:58,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:27:58,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:27:58,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:27:58,742 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:27:58,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 06:27:58,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:27:58,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:27:58,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:27:59,316 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:27:59,316 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 22 treesize of output 24 [2021-11-20 06:27:59,321 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:27:59,322 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 21 treesize of output 17 [2021-11-20 06:27:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:27:59,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:27:59,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892940141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:27:59,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:27:59,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2021-11-20 06:27:59,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408887403] [2021-11-20 06:27:59,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:27:59,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:27:59,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:27:59,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:27:59,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-11-20 06:27:59,698 INFO L87 Difference]: Start difference. First operand 349 states and 403 transitions. Second operand has 17 states, 16 states have (on average 4.8125) internal successors, (77), 13 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:28:00,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:00,533 INFO L93 Difference]: Finished difference Result 501 states and 555 transitions. [2021-11-20 06:28:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 06:28:00,533 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.8125) internal successors, (77), 13 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2021-11-20 06:28:00,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:00,535 INFO L225 Difference]: With dead ends: 501 [2021-11-20 06:28:00,535 INFO L226 Difference]: Without dead ends: 501 [2021-11-20 06:28:00,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=429, Invalid=1463, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 06:28:00,536 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 623 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:00,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 360 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 330 Invalid, 0 Unknown, 358 Unchecked, 0.3s Time] [2021-11-20 06:28:00,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-20 06:28:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 349. [2021-11-20 06:28:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 322 states have (on average 1.1801242236024845) internal successors, (380), 332 states have internal predecessors, (380), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2021-11-20 06:28:00,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 400 transitions. [2021-11-20 06:28:00,546 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 400 transitions. Word has length 54 [2021-11-20 06:28:00,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:00,546 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 400 transitions. [2021-11-20 06:28:00,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.8125) internal successors, (77), 13 states have internal predecessors, (77), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:28:00,547 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 400 transitions. [2021-11-20 06:28:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 06:28:00,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:00,548 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:00,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:00,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-20 06:28:00,776 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:00,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:00,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2021-11-20 06:28:00,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:00,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208617066] [2021-11-20 06:28:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:00,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:00,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:00,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:00,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:28:00,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:28:01,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:01,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208617066] [2021-11-20 06:28:01,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208617066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:01,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976497161] [2021-11-20 06:28:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:01,004 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:01,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:01,008 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:01,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 06:28:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:01,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:28:01,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:01,194 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 06:28:01,194 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 17 treesize of output 21 [2021-11-20 06:28:01,375 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-20 06:28:01,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2021-11-20 06:28:01,501 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:01,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:01,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976497161] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:01,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:01,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-11-20 06:28:01,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141811899] [2021-11-20 06:28:01,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:01,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:28:01,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:01,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:28:01,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-11-20 06:28:01,799 INFO L87 Difference]: Start difference. First operand 349 states and 400 transitions. Second operand has 23 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:28:02,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:02,630 INFO L93 Difference]: Finished difference Result 382 states and 429 transitions. [2021-11-20 06:28:02,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:28:02,630 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 54 [2021-11-20 06:28:02,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:02,632 INFO L225 Difference]: With dead ends: 382 [2021-11-20 06:28:02,632 INFO L226 Difference]: Without dead ends: 382 [2021-11-20 06:28:02,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=379, Invalid=1343, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 06:28:02,633 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 269 mSDsluCounter, 780 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 428 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:02,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 852 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 667 Invalid, 0 Unknown, 428 Unchecked, 0.3s Time] [2021-11-20 06:28:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-20 06:28:02,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 348. [2021-11-20 06:28:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 322 states have (on average 1.173913043478261) internal successors, (378), 331 states have internal predecessors, (378), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2021-11-20 06:28:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 398 transitions. [2021-11-20 06:28:02,641 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 398 transitions. Word has length 54 [2021-11-20 06:28:02,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:02,642 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 398 transitions. [2021-11-20 06:28:02,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 4.473684210526316) internal successors, (85), 16 states have internal predecessors, (85), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:28:02,642 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 398 transitions. [2021-11-20 06:28:02,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:28:02,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:02,643 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:02,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:02,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:02,872 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:02,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:02,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1889386740, now seen corresponding path program 3 times [2021-11-20 06:28:02,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:02,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290445969] [2021-11-20 06:28:02,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:02,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:02,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:02,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:28:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:03,024 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:28:03,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:03,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290445969] [2021-11-20 06:28:03,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290445969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:03,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532341227] [2021-11-20 06:28:03,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:28:03,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:03,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:03,026 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:03,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 06:28:03,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:28:03,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:28:03,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:28:03,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:03,259 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 12 treesize of output 10 [2021-11-20 06:28:03,412 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:28:03,413 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 17 treesize of output 17 [2021-11-20 06:28:03,503 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:28:03,504 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 23 treesize of output 25 [2021-11-20 06:28:03,727 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 41 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:28:03,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:03,888 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:28:03,889 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 29 treesize of output 28 [2021-11-20 06:28:04,223 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:28:04,224 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 22 [2021-11-20 06:28:04,305 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 27 treesize of output 23 [2021-11-20 06:28:04,482 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 21 treesize of output 17 [2021-11-20 06:28:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 42 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:28:04,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532341227] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:04,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:28:04,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2021-11-20 06:28:04,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473933256] [2021-11-20 06:28:04,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:04,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 06:28:04,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:04,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 06:28:04,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:28:04,504 INFO L87 Difference]: Start difference. First operand 348 states and 398 transitions. Second operand has 31 states, 29 states have (on average 4.862068965517241) internal successors, (141), 26 states have internal predecessors, (141), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:28:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:05,811 INFO L93 Difference]: Finished difference Result 479 states and 538 transitions. [2021-11-20 06:28:05,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 06:28:05,812 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 4.862068965517241) internal successors, (141), 26 states have internal predecessors, (141), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 56 [2021-11-20 06:28:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:05,814 INFO L225 Difference]: With dead ends: 479 [2021-11-20 06:28:05,814 INFO L226 Difference]: Without dead ends: 479 [2021-11-20 06:28:05,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 119 SyntacticMatches, 9 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=851, Invalid=2809, Unknown=0, NotChecked=0, Total=3660 [2021-11-20 06:28:05,816 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 920 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:05,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [920 Valid, 679 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 470 Invalid, 0 Unknown, 450 Unchecked, 0.3s Time] [2021-11-20 06:28:05,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-11-20 06:28:05,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 357. [2021-11-20 06:28:05,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 331 states have (on average 1.1752265861027191) internal successors, (389), 340 states have internal predecessors, (389), 8 states have call successors, (8), 8 states have call predecessors, (8), 12 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2021-11-20 06:28:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 409 transitions. [2021-11-20 06:28:05,825 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 409 transitions. Word has length 56 [2021-11-20 06:28:05,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:05,826 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 409 transitions. [2021-11-20 06:28:05,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 4.862068965517241) internal successors, (141), 26 states have internal predecessors, (141), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-20 06:28:05,826 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 409 transitions. [2021-11-20 06:28:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 06:28:05,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:05,827 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:05,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:06,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:06,044 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:06,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:06,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1452589751, now seen corresponding path program 1 times [2021-11-20 06:28:06,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:06,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572078357] [2021-11-20 06:28:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:06,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:06,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:06,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:28:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:28:06,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:06,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572078357] [2021-11-20 06:28:06,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572078357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:06,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503344214] [2021-11-20 06:28:06,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:06,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:06,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:06,244 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:06,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 06:28:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:06,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 06:28:06,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:06,915 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:28:06,916 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 22 treesize of output 24 [2021-11-20 06:28:06,920 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:28:06,921 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 21 treesize of output 17 [2021-11-20 06:28:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:28:07,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:07,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503344214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:07,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:07,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-11-20 06:28:07,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484172144] [2021-11-20 06:28:07,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:07,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:28:07,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:28:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:28:07,367 INFO L87 Difference]: Start difference. First operand 357 states and 409 transitions. Second operand has 18 states, 16 states have (on average 5.0625) internal successors, (81), 13 states have internal predecessors, (81), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:28:07,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:07,897 INFO L93 Difference]: Finished difference Result 400 states and 449 transitions. [2021-11-20 06:28:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:28:07,898 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 5.0625) internal successors, (81), 13 states have internal predecessors, (81), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 58 [2021-11-20 06:28:07,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:07,899 INFO L225 Difference]: With dead ends: 400 [2021-11-20 06:28:07,899 INFO L226 Difference]: Without dead ends: 400 [2021-11-20 06:28:07,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=674, Unknown=0, NotChecked=0, Total=870 [2021-11-20 06:28:07,900 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 271 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:07,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 372 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 279 Invalid, 0 Unknown, 203 Unchecked, 0.2s Time] [2021-11-20 06:28:07,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-11-20 06:28:07,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 313. [2021-11-20 06:28:07,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 289 states have (on average 1.1764705882352942) internal successors, (340), 298 states have internal predecessors, (340), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-20 06:28:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 358 transitions. [2021-11-20 06:28:07,908 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 358 transitions. Word has length 58 [2021-11-20 06:28:07,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:07,908 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 358 transitions. [2021-11-20 06:28:07,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 5.0625) internal successors, (81), 13 states have internal predecessors, (81), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:28:07,909 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 358 transitions. [2021-11-20 06:28:07,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:28:07,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:07,910 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:07,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:08,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:08,125 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:08,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:08,125 INFO L85 PathProgramCache]: Analyzing trace with hash -875913561, now seen corresponding path program 1 times [2021-11-20 06:28:08,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:08,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631519212] [2021-11-20 06:28:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:08,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:08,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:08,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:28:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:28:08,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:08,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631519212] [2021-11-20 06:28:08,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631519212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:08,268 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:08,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-20 06:28:08,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602576236] [2021-11-20 06:28:08,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:08,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:28:08,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:08,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:28:08,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:28:08,269 INFO L87 Difference]: Start difference. First operand 313 states and 358 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:28:08,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:08,492 INFO L93 Difference]: Finished difference Result 280 states and 306 transitions. [2021-11-20 06:28:08,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:28:08,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 2 states have call successors, (3), 2 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 60 [2021-11-20 06:28:08,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:08,494 INFO L225 Difference]: With dead ends: 280 [2021-11-20 06:28:08,494 INFO L226 Difference]: Without dead ends: 280 [2021-11-20 06:28:08,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:28:08,495 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 113 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:08,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 166 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:28:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-20 06:28:08,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 259. [2021-11-20 06:28:08,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 238 states have (on average 1.134453781512605) internal successors, (270), 246 states have internal predecessors, (270), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-20 06:28:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 285 transitions. [2021-11-20 06:28:08,499 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 285 transitions. Word has length 60 [2021-11-20 06:28:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:08,499 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 285 transitions. [2021-11-20 06:28:08,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:28:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 285 transitions. [2021-11-20 06:28:08,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:28:08,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:08,500 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:08,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-11-20 06:28:08,500 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:08,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:08,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1294554201, now seen corresponding path program 2 times [2021-11-20 06:28:08,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:08,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665332301] [2021-11-20 06:28:08,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:08,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:08,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:08,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:28:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:28:08,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:08,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665332301] [2021-11-20 06:28:08,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665332301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:08,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476293878] [2021-11-20 06:28:08,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:28:08,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:08,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:08,851 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:08,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-20 06:28:08,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:28:08,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:28:08,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:28:08,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:09,160 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 06:28:09,161 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 17 treesize of output 21 [2021-11-20 06:28:09,505 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-20 06:28:09,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2021-11-20 06:28:09,730 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 19 treesize of output 7 [2021-11-20 06:28:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:09,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:09,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476293878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:09,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:09,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 26 [2021-11-20 06:28:09,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690847598] [2021-11-20 06:28:09,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:09,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:28:09,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:09,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:28:09,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-11-20 06:28:09,877 INFO L87 Difference]: Start difference. First operand 259 states and 285 transitions. Second operand has 28 states, 25 states have (on average 4.32) internal successors, (108), 22 states have internal predecessors, (108), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:28:10,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:10,730 INFO L93 Difference]: Finished difference Result 293 states and 316 transitions. [2021-11-20 06:28:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:28:10,730 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 4.32) internal successors, (108), 22 states have internal predecessors, (108), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 60 [2021-11-20 06:28:10,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:10,732 INFO L225 Difference]: With dead ends: 293 [2021-11-20 06:28:10,732 INFO L226 Difference]: Without dead ends: 293 [2021-11-20 06:28:10,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=345, Invalid=1725, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 06:28:10,733 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 247 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:10,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 555 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 366 Invalid, 0 Unknown, 306 Unchecked, 0.2s Time] [2021-11-20 06:28:10,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-20 06:28:10,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 260. [2021-11-20 06:28:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 239 states have (on average 1.1338912133891212) internal successors, (271), 247 states have internal predecessors, (271), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-20 06:28:10,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 286 transitions. [2021-11-20 06:28:10,745 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 286 transitions. Word has length 60 [2021-11-20 06:28:10,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:10,745 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 286 transitions. [2021-11-20 06:28:10,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 4.32) internal successors, (108), 22 states have internal predecessors, (108), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:28:10,745 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 286 transitions. [2021-11-20 06:28:10,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:28:10,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:10,747 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:10,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:10,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:10,960 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:10,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1476474522, now seen corresponding path program 1 times [2021-11-20 06:28:10,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:10,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897966867] [2021-11-20 06:28:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:10,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:11,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:11,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:28:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:28:11,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:11,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897966867] [2021-11-20 06:28:11,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897966867] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:11,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395381862] [2021-11-20 06:28:11,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:11,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:11,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:11,443 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:11,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-20 06:28:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:11,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-20 06:28:11,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:12,261 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:28:12,261 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 12 treesize of output 14 [2021-11-20 06:28:12,280 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:28:12,280 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 12 treesize of output 18 [2021-11-20 06:28:12,821 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 [2021-11-20 06:28:13,052 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 06:28:13,052 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 3 case distinctions, treesize of input 41 treesize of output 46 [2021-11-20 06:28:13,063 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 06:28:13,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 38 [2021-11-20 06:28:14,398 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:28:14,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-11-20 06:28:14,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:28:14,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-11-20 06:28:14,511 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:28:14,511 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 34 treesize of output 34 [2021-11-20 06:28:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:14,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:14,878 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 22 treesize of output 14 [2021-11-20 06:28:14,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395381862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:14,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:14,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 33 [2021-11-20 06:28:14,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970206968] [2021-11-20 06:28:14,935 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:14,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 06:28:14,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:14,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 06:28:14,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1480, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 06:28:14,936 INFO L87 Difference]: Start difference. First operand 260 states and 286 transitions. Second operand has 35 states, 32 states have (on average 3.5) internal successors, (112), 28 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:28:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:17,362 INFO L93 Difference]: Finished difference Result 286 states and 309 transitions. [2021-11-20 06:28:17,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:28:17,362 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 3.5) internal successors, (112), 28 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 61 [2021-11-20 06:28:17,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:17,363 INFO L225 Difference]: With dead ends: 286 [2021-11-20 06:28:17,363 INFO L226 Difference]: Without dead ends: 286 [2021-11-20 06:28:17,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=580, Invalid=3842, Unknown=0, NotChecked=0, Total=4422 [2021-11-20 06:28:17,365 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 625 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 387 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:17,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 703 Invalid, 1458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 962 Invalid, 0 Unknown, 387 Unchecked, 0.6s Time] [2021-11-20 06:28:17,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-20 06:28:17,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 261. [2021-11-20 06:28:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 240 states have (on average 1.1333333333333333) internal successors, (272), 248 states have internal predecessors, (272), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-20 06:28:17,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 287 transitions. [2021-11-20 06:28:17,370 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 287 transitions. Word has length 61 [2021-11-20 06:28:17,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:17,371 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 287 transitions. [2021-11-20 06:28:17,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 3.5) internal successors, (112), 28 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:28:17,371 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 287 transitions. [2021-11-20 06:28:17,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:28:17,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:17,372 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:17,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:17,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:17,600 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:17,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:17,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1046625802, now seen corresponding path program 1 times [2021-11-20 06:28:17,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:17,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384042751] [2021-11-20 06:28:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:17,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:17,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:17,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:17,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:28:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:28:17,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:17,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384042751] [2021-11-20 06:28:17,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384042751] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:17,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021831226] [2021-11-20 06:28:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:17,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:17,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:17,943 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:17,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-20 06:28:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:18,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 06:28:18,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:18,257 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:28:18,257 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 12 treesize of output 18 [2021-11-20 06:28:18,477 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:28:18,477 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 17 treesize of output 17 [2021-11-20 06:28:18,573 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 [2021-11-20 06:28:18,676 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 06:28:18,676 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 3 case distinctions, treesize of input 30 treesize of output 35 [2021-11-20 06:28:18,885 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:28:18,885 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 25 treesize of output 25 [2021-11-20 06:28:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 13 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:19,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:19,483 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:28:19,483 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 29 treesize of output 28 [2021-11-20 06:28:19,494 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 10 treesize of output 8 [2021-11-20 06:28:19,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021831226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:19,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:19,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 29 [2021-11-20 06:28:19,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765224971] [2021-11-20 06:28:19,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:19,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 06:28:19,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:19,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 06:28:19,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:28:19,541 INFO L87 Difference]: Start difference. First operand 261 states and 287 transitions. Second operand has 31 states, 28 states have (on average 4.0) internal successors, (112), 25 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:28:20,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:20,843 INFO L93 Difference]: Finished difference Result 286 states and 307 transitions. [2021-11-20 06:28:20,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:28:20,844 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 4.0) internal successors, (112), 25 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 61 [2021-11-20 06:28:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:20,845 INFO L225 Difference]: With dead ends: 286 [2021-11-20 06:28:20,845 INFO L226 Difference]: Without dead ends: 286 [2021-11-20 06:28:20,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 53 SyntacticMatches, 21 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=602, Invalid=2368, Unknown=0, NotChecked=0, Total=2970 [2021-11-20 06:28:20,847 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 529 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:20,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 334 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 589 Invalid, 0 Unknown, 222 Unchecked, 0.3s Time] [2021-11-20 06:28:20,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-20 06:28:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 259. [2021-11-20 06:28:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 240 states have (on average 1.1125) internal successors, (267), 246 states have internal predecessors, (267), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-20 06:28:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 282 transitions. [2021-11-20 06:28:20,852 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 282 transitions. Word has length 61 [2021-11-20 06:28:20,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:20,853 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 282 transitions. [2021-11-20 06:28:20,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 4.0) internal successors, (112), 25 states have internal predecessors, (112), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:28:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 282 transitions. [2021-11-20 06:28:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:28:20,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:20,854 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:20,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:21,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:21,064 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:21,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:21,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1914338556, now seen corresponding path program 1 times [2021-11-20 06:28:21,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:21,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074952337] [2021-11-20 06:28:21,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:21,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:21,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:21,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:28:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:28:21,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074952337] [2021-11-20 06:28:21,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074952337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:21,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654853980] [2021-11-20 06:28:21,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:21,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:21,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:21,389 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:21,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-20 06:28:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:21,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 06:28:21,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:21,646 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 06:28:21,647 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 17 treesize of output 21 [2021-11-20 06:28:22,042 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-20 06:28:22,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 46 [2021-11-20 06:28:22,379 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 19 treesize of output 7 [2021-11-20 06:28:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:22,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:22,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654853980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:22,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:22,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2021-11-20 06:28:22,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139455776] [2021-11-20 06:28:22,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:22,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 06:28:22,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:22,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 06:28:22,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 06:28:22,578 INFO L87 Difference]: Start difference. First operand 259 states and 282 transitions. Second operand has 30 states, 27 states have (on average 4.148148148148148) internal successors, (112), 24 states have internal predecessors, (112), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:28:23,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:23,850 INFO L93 Difference]: Finished difference Result 282 states and 303 transitions. [2021-11-20 06:28:23,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 06:28:23,851 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 4.148148148148148) internal successors, (112), 24 states have internal predecessors, (112), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 62 [2021-11-20 06:28:23,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:23,852 INFO L225 Difference]: With dead ends: 282 [2021-11-20 06:28:23,852 INFO L226 Difference]: Without dead ends: 282 [2021-11-20 06:28:23,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=456, Invalid=2196, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 06:28:23,854 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 292 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:23,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 525 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 634 Invalid, 0 Unknown, 314 Unchecked, 0.3s Time] [2021-11-20 06:28:23,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-20 06:28:23,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 258. [2021-11-20 06:28:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 240 states have (on average 1.1083333333333334) internal successors, (266), 245 states have internal predecessors, (266), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-20 06:28:23,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 281 transitions. [2021-11-20 06:28:23,860 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 281 transitions. Word has length 62 [2021-11-20 06:28:23,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:23,861 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 281 transitions. [2021-11-20 06:28:23,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 4.148148148148148) internal successors, (112), 24 states have internal predecessors, (112), 5 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 06:28:23,861 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 281 transitions. [2021-11-20 06:28:23,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-20 06:28:23,862 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:23,862 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:23,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:24,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-20 06:28:24,078 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:24,078 INFO L85 PathProgramCache]: Analyzing trace with hash 785046953, now seen corresponding path program 1 times [2021-11-20 06:28:24,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:24,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695494358] [2021-11-20 06:28:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:24,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:24,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:24,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:28:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:24,542 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:28:24,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:24,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695494358] [2021-11-20 06:28:24,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695494358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:24,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70005840] [2021-11-20 06:28:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:24,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:24,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:24,545 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:24,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-20 06:28:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 06:28:24,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:24,932 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 19 treesize of output 7 [2021-11-20 06:28:24,958 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 38 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:24,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:25,069 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 19 treesize of output 7 [2021-11-20 06:28:25,207 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:28:25,207 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 22 treesize of output 22 [2021-11-20 06:28:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 38 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:25,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70005840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:25,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:28:25,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 36 [2021-11-20 06:28:25,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749432671] [2021-11-20 06:28:25,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:25,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 06:28:25,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:25,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 06:28:25,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 06:28:25,355 INFO L87 Difference]: Start difference. First operand 258 states and 281 transitions. Second operand has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 29 states have internal predecessors, (148), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 06:28:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:27,612 INFO L93 Difference]: Finished difference Result 279 states and 294 transitions. [2021-11-20 06:28:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-20 06:28:27,613 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 29 states have internal predecessors, (148), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 63 [2021-11-20 06:28:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:27,613 INFO L225 Difference]: With dead ends: 279 [2021-11-20 06:28:27,614 INFO L226 Difference]: Without dead ends: 279 [2021-11-20 06:28:27,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=798, Invalid=3234, Unknown=0, NotChecked=0, Total=4032 [2021-11-20 06:28:27,614 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1070 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1118 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1070 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:27,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1070 Valid, 437 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1118 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:28:27,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-20 06:28:27,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 252. [2021-11-20 06:28:27,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 235 states have (on average 1.0808510638297872) internal successors, (254), 239 states have internal predecessors, (254), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-20 06:28:27,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 269 transitions. [2021-11-20 06:28:27,620 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 269 transitions. Word has length 63 [2021-11-20 06:28:27,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:27,621 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 269 transitions. [2021-11-20 06:28:27,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.228571428571429) internal successors, (148), 29 states have internal predecessors, (148), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 06:28:27,621 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 269 transitions. [2021-11-20 06:28:27,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 06:28:27,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:27,622 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:27,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:27,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-20 06:28:27,837 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:27,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:27,837 INFO L85 PathProgramCache]: Analyzing trace with hash 586619876, now seen corresponding path program 1 times [2021-11-20 06:28:27,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:27,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938897696] [2021-11-20 06:28:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:27,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:27,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:27,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:27,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:28:27,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:28:27,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:27,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938897696] [2021-11-20 06:28:27,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938897696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:27,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260414641] [2021-11-20 06:28:27,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:27,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:27,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:27,967 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:27,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-20 06:28:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:28,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 06:28:28,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:28,091 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 [2021-11-20 06:28:28,301 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-20 06:28:28,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 17 [2021-11-20 06:28:28,395 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-20 06:28:28,396 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 3 case distinctions, treesize of input 17 treesize of output 30 [2021-11-20 06:28:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:28,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:28,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260414641] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:28:28,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:28,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-11-20 06:28:28,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465130794] [2021-11-20 06:28:28,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:28,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:28:28,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:28,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:28:28,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:28:28,733 INFO L87 Difference]: Start difference. First operand 252 states and 269 transitions. Second operand has 14 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:28:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:28,981 INFO L93 Difference]: Finished difference Result 267 states and 283 transitions. [2021-11-20 06:28:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:28:28,982 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2021-11-20 06:28:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:28,983 INFO L225 Difference]: With dead ends: 267 [2021-11-20 06:28:28,983 INFO L226 Difference]: Without dead ends: 267 [2021-11-20 06:28:28,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:28:28,984 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 56 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:28,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 316 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 326 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2021-11-20 06:28:28,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-20 06:28:28,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 207. [2021-11-20 06:28:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 194 states have (on average 1.077319587628866) internal successors, (209), 196 states have internal predecessors, (209), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-20 06:28:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 221 transitions. [2021-11-20 06:28:28,989 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 221 transitions. Word has length 66 [2021-11-20 06:28:28,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:28,989 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 221 transitions. [2021-11-20 06:28:28,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 7.0) internal successors, (91), 13 states have internal predecessors, (91), 3 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 06:28:28,989 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 221 transitions. [2021-11-20 06:28:28,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 06:28:28,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:28,990 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:29,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-20 06:28:29,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:29,200 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:29,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:29,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1008566956, now seen corresponding path program 1 times [2021-11-20 06:28:29,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:29,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449700034] [2021-11-20 06:28:29,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:29,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:29,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:28:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:29,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 06:28:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:29,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 06:28:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-11-20 06:28:29,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:29,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449700034] [2021-11-20 06:28:29,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449700034] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:29,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:29,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:28:29,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800648317] [2021-11-20 06:28:29,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:29,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:28:29,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:29,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:28:29,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:28:29,260 INFO L87 Difference]: Start difference. First operand 207 states and 221 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 06:28:29,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:29,305 INFO L93 Difference]: Finished difference Result 218 states and 231 transitions. [2021-11-20 06:28:29,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:28:29,305 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 67 [2021-11-20 06:28:29,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:29,306 INFO L225 Difference]: With dead ends: 218 [2021-11-20 06:28:29,306 INFO L226 Difference]: Without dead ends: 196 [2021-11-20 06:28:29,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:28:29,309 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:29,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 64 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:28:29,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-20 06:28:29,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 190. [2021-11-20 06:28:29,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 177 states have (on average 1.0677966101694916) internal successors, (189), 179 states have internal predecessors, (189), 5 states have call successors, (5), 5 states have call predecessors, (5), 7 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-20 06:28:29,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 201 transitions. [2021-11-20 06:28:29,314 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 201 transitions. Word has length 67 [2021-11-20 06:28:29,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:29,316 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 201 transitions. [2021-11-20 06:28:29,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 06:28:29,316 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 201 transitions. [2021-11-20 06:28:29,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 06:28:29,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:29,318 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:29,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-20 06:28:29,318 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:29,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:29,319 INFO L85 PathProgramCache]: Analyzing trace with hash 272552823, now seen corresponding path program 1 times [2021-11-20 06:28:29,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:29,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670957571] [2021-11-20 06:28:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:29,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:28:29,352 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 06:28:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 06:28:29,417 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 06:28:29,417 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 06:28:29,418 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2021-11-20 06:28:29,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATION (18 of 20 remaining) [2021-11-20 06:28:29,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATION (17 of 20 remaining) [2021-11-20 06:28:29,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2021-11-20 06:28:29,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2021-11-20 06:28:29,420 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2021-11-20 06:28:29,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2021-11-20 06:28:29,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATION (12 of 20 remaining) [2021-11-20 06:28:29,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATION (11 of 20 remaining) [2021-11-20 06:28:29,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATION (10 of 20 remaining) [2021-11-20 06:28:29,421 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATION (9 of 20 remaining) [2021-11-20 06:28:29,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2021-11-20 06:28:29,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2021-11-20 06:28:29,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2021-11-20 06:28:29,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2021-11-20 06:28:29,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2021-11-20 06:28:29,422 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2021-11-20 06:28:29,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2021-11-20 06:28:29,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2021-11-20 06:28:29,423 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2021-11-20 06:28:29,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-20 06:28:29,426 INFO L732 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:29,429 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:28:29,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:28:29 BoogieIcfgContainer [2021-11-20 06:28:29,542 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:28:29,543 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:28:29,545 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:28:29,545 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:28:29,546 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:27:08" (3/4) ... [2021-11-20 06:28:29,549 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 06:28:29,549 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:28:29,550 INFO L158 Benchmark]: Toolchain (without parser) took 82103.83ms. Allocated memory was 119.5MB in the beginning and 232.8MB in the end (delta: 113.2MB). Free memory was 80.0MB in the beginning and 144.6MB in the end (delta: -64.6MB). Peak memory consumption was 48.0MB. Max. memory is 16.1GB. [2021-11-20 06:28:29,550 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 119.5MB. Free memory is still 97.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:28:29,550 INFO L158 Benchmark]: CACSL2BoogieTranslator took 517.96ms. Allocated memory is still 119.5MB. Free memory was 79.8MB in the beginning and 84.7MB in the end (delta: -4.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:28:29,550 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.62ms. Allocated memory is still 119.5MB. Free memory was 84.7MB in the beginning and 82.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:28:29,551 INFO L158 Benchmark]: Boogie Preprocessor took 50.92ms. Allocated memory is still 119.5MB. Free memory was 82.6MB in the beginning and 81.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:28:29,551 INFO L158 Benchmark]: RCFGBuilder took 515.74ms. Allocated memory is still 119.5MB. Free memory was 81.0MB in the beginning and 67.4MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-20 06:28:29,551 INFO L158 Benchmark]: TraceAbstraction took 80948.95ms. Allocated memory was 119.5MB in the beginning and 232.8MB in the end (delta: 113.2MB). Free memory was 66.9MB in the beginning and 144.6MB in the end (delta: -77.8MB). Peak memory consumption was 37.6MB. Max. memory is 16.1GB. [2021-11-20 06:28:29,551 INFO L158 Benchmark]: Witness Printer took 6.32ms. Allocated memory is still 232.8MB. Free memory is still 144.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:28:29,552 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 119.5MB. Free memory is still 97.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 517.96ms. Allocated memory is still 119.5MB. Free memory was 79.8MB in the beginning and 84.7MB in the end (delta: -4.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.62ms. Allocated memory is still 119.5MB. Free memory was 84.7MB in the beginning and 82.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 50.92ms. Allocated memory is still 119.5MB. Free memory was 82.6MB in the beginning and 81.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 515.74ms. Allocated memory is still 119.5MB. Free memory was 81.0MB in the beginning and 67.4MB in the end (delta: 13.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 80948.95ms. Allocated memory was 119.5MB in the beginning and 232.8MB in the end (delta: 113.2MB). Free memory was 66.9MB in the beginning and 144.6MB in the end (delta: -77.8MB). Peak memory consumption was 37.6MB. Max. memory is 16.1GB. * Witness Printer took 6.32ms. Allocated memory is still 232.8MB. Free memory is still 144.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 721]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693, overapproximation of memtrack at line 721. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; VAL [commands={6:0}, global={0:0}, state=0] [L722] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={3:0}, input={3:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={3:0}, input={3:0}, state=0] [L722] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L723] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={2:0}, global={0:0}, i=1, input={4:0}, input={4:0}, state=0] [L693] COND FALSE !(strcmp(commands[i].name,input) == 0) [L692] i++ VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L692] COND FALSE !(i < 2) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=2, input={4:0}, input={4:0}, state=0] [L723] RET parse_input("c1") VAL [commands={6:0}, global={0:0}, state=0] [L724] CALL parse_input("c2") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].function={-1:0}, global={0:0}, i=0, input={5:0}, input={5:0}, state=0] [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L706] COND FALSE !(\read(*global)) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0, x={-3:0}] [L709] global = x [L710] state = STATE_2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={-3:0}, state=1, x={-3:0}] [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={-3:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={-3:0}, state=1] - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 707]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 61 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 80.8s, OverallIterations: 53, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 28.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 14804 SdHoareTripleChecker+Valid, 10.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14784 mSDsluCounter, 18211 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5208 IncrementalHoareTripleChecker+Unchecked, 15388 mSDsCounter, 2159 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15021 IncrementalHoareTripleChecker+Invalid, 22388 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2159 mSolverCounterUnsat, 2823 mSDtfsCounter, 15021 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3913 GetRequests, 2603 SyntacticMatches, 102 SemanticMatches, 1208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12574 ImplicationChecksByTransitivity, 26.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=428occurred in iteration=39, InterpolantAutomatonStates: 755, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 52 MinimizatonAttempts, 2448 StatesRemovedByMinimization, 51 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 37.5s InterpolantComputationTime, 4027 NumberOfCodeBlocks, 4019 NumberOfCodeBlocksAsserted, 101 NumberOfCheckSat, 4549 ConstructedInterpolants, 444 QuantifiedInterpolants, 53074 SizeOfPredicates, 177 NumberOfNonLiveVariables, 11176 ConjunctsInSsa, 735 ConjunctsInUnsatCore, 111 InterpolantComputations, 18 PerfectInterpolantSequences, 1836/3325 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 [2021-11-20 06:28:29,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF --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 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:28:32,101 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:28:32,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:28:32,154 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:28:32,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:28:32,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:28:32,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:28:32,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:28:32,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:28:32,177 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:28:32,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:28:32,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:28:32,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:28:32,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:28:32,188 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:28:32,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:28:32,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:28:32,196 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:28:32,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:28:32,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:28:32,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:28:32,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:28:32,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:28:32,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:28:32,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:28:32,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:28:32,221 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:28:32,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:28:32,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:28:32,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:28:32,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:28:32,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:28:32,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:28:32,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:28:32,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:28:32,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:28:32,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:28:32,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:28:32,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:28:32,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:28:32,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:28:32,244 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-20 06:28:32,291 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:28:32,292 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:28:32,292 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:28:32,292 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:28:32,293 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:28:32,293 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:28:32,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:28:32,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:28:32,295 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:28:32,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:28:32,295 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:28:32,295 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 06:28:32,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:28:32,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:28:32,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:28:32,296 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 06:28:32,297 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 06:28:32,297 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 06:28:32,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:28:32,297 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 06:28:32,297 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 06:28:32,298 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 06:28:32,298 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:28:32,298 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:28:32,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:28:32,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:28:32,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:28:32,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:28:32,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:28:32,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:28:32,300 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 06:28:32,300 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 06:28:32,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:28:32,301 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 06:28:32,301 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_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c883b81b24ce5a721aa9a1ff13aef8a0d532ba87d9e130e470a0b88a1f8e93e [2021-11-20 06:28:32,653 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:28:32,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:28:32,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:28:32,679 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:28:32,680 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:28:32,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-11-20 06:28:32,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/data/f72bf47bc/4f58544c6feb46b9bf9d794cd331b528/FLAG238f2825d [2021-11-20 06:28:33,319 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:28:33,320 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/sv-benchmarks/c/memsafety-bftpd/bftpd_2.i [2021-11-20 06:28:33,338 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/data/f72bf47bc/4f58544c6feb46b9bf9d794cd331b528/FLAG238f2825d [2021-11-20 06:28:33,588 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/data/f72bf47bc/4f58544c6feb46b9bf9d794cd331b528 [2021-11-20 06:28:33,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:28:33,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:28:33,595 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:28:33,595 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:28:33,611 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:28:33,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:28:33" (1/1) ... [2021-11-20 06:28:33,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79ed4bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:33, skipping insertion in model container [2021-11-20 06:28:33,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:28:33" (1/1) ... [2021-11-20 06:28:33,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:28:33,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:28:34,152 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:28:34,171 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:28:34,259 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:28:34,321 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:28:34,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:34 WrapperNode [2021-11-20 06:28:34,321 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:28:34,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:28:34,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:28:34,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:28:34,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:34" (1/1) ... [2021-11-20 06:28:34,367 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:34" (1/1) ... [2021-11-20 06:28:34,406 INFO L137 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2021-11-20 06:28:34,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:28:34,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:28:34,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:28:34,409 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:28:34,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:34" (1/1) ... [2021-11-20 06:28:34,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:34" (1/1) ... [2021-11-20 06:28:34,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:34" (1/1) ... [2021-11-20 06:28:34,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:34" (1/1) ... [2021-11-20 06:28:34,443 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:34" (1/1) ... [2021-11-20 06:28:34,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:34" (1/1) ... [2021-11-20 06:28:34,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:34" (1/1) ... [2021-11-20 06:28:34,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:28:34,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:28:34,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:28:34,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:28:34,478 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:34" (1/1) ... [2021-11-20 06:28:34,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:28:34,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:34,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:28:34,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:28:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-20 06:28:34,564 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-11-20 06:28:34,564 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-11-20 06:28:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:28:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:28:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 06:28:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:28:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 06:28:34,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 06:28:34,566 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:28:34,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:28:34,696 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:28:34,709 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:28:35,121 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:28:35,129 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:28:35,129 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 06:28:35,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:28:35 BoogieIcfgContainer [2021-11-20 06:28:35,131 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:28:35,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:28:35,133 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:28:35,144 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:28:35,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:28:33" (1/3) ... [2021-11-20 06:28:35,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6786cdc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:28:35, skipping insertion in model container [2021-11-20 06:28:35,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:34" (2/3) ... [2021-11-20 06:28:35,146 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6786cdc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:28:35, skipping insertion in model container [2021-11-20 06:28:35,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:28:35" (3/3) ... [2021-11-20 06:28:35,150 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_2.i [2021-11-20 06:28:35,158 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:28:35,158 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-20 06:28:35,220 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:28:35,235 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:28:35,239 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-20 06:28:35,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 06:28:35,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 06:28:35,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:35,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 06:28:35,269 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:35,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:35,275 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2021-11-20 06:28:35,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:28:35,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [575066602] [2021-11-20 06:28:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:35,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:28:35,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:28:35,295 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:28:35,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 06:28:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:35,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:28:35,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:35,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:35,604 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:28:35,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [575066602] [2021-11-20 06:28:35,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [575066602] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:35,605 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:35,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-20 06:28:35,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065833934] [2021-11-20 06:28:35,608 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:35,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:28:35,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:28:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:28:35,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:28:35,649 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:35,893 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2021-11-20 06:28:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:28:35,900 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 06:28:35,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:35,910 INFO L225 Difference]: With dead ends: 124 [2021-11-20 06:28:35,910 INFO L226 Difference]: Without dead ends: 118 [2021-11-20 06:28:35,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:28:35,915 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 102 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:35,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 123 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:28:35,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-20 06:28:35,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2021-11-20 06:28:35,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 82 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-20 06:28:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 123 transitions. [2021-11-20 06:28:35,968 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 123 transitions. Word has length 6 [2021-11-20 06:28:35,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:35,968 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 123 transitions. [2021-11-20 06:28:35,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 123 transitions. [2021-11-20 06:28:35,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 06:28:35,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:35,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 06:28:35,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-20 06:28:36,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:28:36,182 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:36,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:36,183 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2021-11-20 06:28:36,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:28:36,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1526057182] [2021-11-20 06:28:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:36,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:28:36,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:28:36,185 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:28:36,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 06:28:36,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:36,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:28:36,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:36,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:36,676 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:28:36,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1526057182] [2021-11-20 06:28:36,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1526057182] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:36,677 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:36,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-20 06:28:36,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99166697] [2021-11-20 06:28:36,678 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:36,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:28:36,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:28:36,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:28:36,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:28:36,680 INFO L87 Difference]: Start difference. First operand 92 states and 123 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:37,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:37,413 INFO L93 Difference]: Finished difference Result 238 states and 338 transitions. [2021-11-20 06:28:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:28:37,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 06:28:37,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:37,421 INFO L225 Difference]: With dead ends: 238 [2021-11-20 06:28:37,421 INFO L226 Difference]: Without dead ends: 238 [2021-11-20 06:28:37,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:28:37,424 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 159 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:37,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 233 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:28:37,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-20 06:28:37,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 183. [2021-11-20 06:28:37,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 145 states have (on average 1.5862068965517242) internal successors, (230), 165 states have internal predecessors, (230), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (44), 11 states have call predecessors, (44), 11 states have call successors, (44) [2021-11-20 06:28:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 285 transitions. [2021-11-20 06:28:37,509 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 285 transitions. Word has length 6 [2021-11-20 06:28:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:37,509 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 285 transitions. [2021-11-20 06:28:37,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 285 transitions. [2021-11-20 06:28:37,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 06:28:37,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:37,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:37,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:37,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:28:37,725 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:37,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2021-11-20 06:28:37,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:28:37,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1284539338] [2021-11-20 06:28:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:37,727 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:28:37,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:28:37,728 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:28:37,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 06:28:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:37,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:28:37,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:37,991 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 [2021-11-20 06:28:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:38,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:38,107 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:28:38,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1284539338] [2021-11-20 06:28:38,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1284539338] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:38,108 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:38,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-20 06:28:38,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724073095] [2021-11-20 06:28:38,108 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:38,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:28:38,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:28:38,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:28:38,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:28:38,110 INFO L87 Difference]: Start difference. First operand 183 states and 285 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:38,566 INFO L93 Difference]: Finished difference Result 261 states and 375 transitions. [2021-11-20 06:28:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:28:38,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 06:28:38,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:38,570 INFO L225 Difference]: With dead ends: 261 [2021-11-20 06:28:38,571 INFO L226 Difference]: Without dead ends: 261 [2021-11-20 06:28:38,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:28:38,572 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 112 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:38,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 284 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:28:38,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-20 06:28:38,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 186. [2021-11-20 06:28:38,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 148 states have (on average 1.5743243243243243) internal successors, (233), 168 states have internal predecessors, (233), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (44), 11 states have call predecessors, (44), 11 states have call successors, (44) [2021-11-20 06:28:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 288 transitions. [2021-11-20 06:28:38,620 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 288 transitions. Word has length 7 [2021-11-20 06:28:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:38,621 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 288 transitions. [2021-11-20 06:28:38,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:38,621 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 288 transitions. [2021-11-20 06:28:38,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 06:28:38,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:38,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:38,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-20 06:28:38,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:28:38,838 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:38,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:38,839 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2021-11-20 06:28:38,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:28:38,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2043826652] [2021-11-20 06:28:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:38,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:28:38,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:28:38,841 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:28:38,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 06:28:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:38,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:28:38,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:39,079 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 [2021-11-20 06:28:39,090 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 [2021-11-20 06:28:39,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:39,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:39,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:28:39,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2043826652] [2021-11-20 06:28:39,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2043826652] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:39,234 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:39,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-20 06:28:39,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162358602] [2021-11-20 06:28:39,235 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:39,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:28:39,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:28:39,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:28:39,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:28:39,236 INFO L87 Difference]: Start difference. First operand 186 states and 288 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:39,918 INFO L93 Difference]: Finished difference Result 415 states and 580 transitions. [2021-11-20 06:28:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:28:39,919 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 06:28:39,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:39,924 INFO L225 Difference]: With dead ends: 415 [2021-11-20 06:28:39,925 INFO L226 Difference]: Without dead ends: 415 [2021-11-20 06:28:39,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:28:39,927 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 317 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:39,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [317 Valid, 309 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:28:39,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-11-20 06:28:39,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 296. [2021-11-20 06:28:39,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 246 states have (on average 1.5528455284552845) internal successors, (382), 272 states have internal predecessors, (382), 14 states have call successors, (14), 9 states have call predecessors, (14), 18 states have return successors, (76), 14 states have call predecessors, (76), 14 states have call successors, (76) [2021-11-20 06:28:39,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 472 transitions. [2021-11-20 06:28:39,957 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 472 transitions. Word has length 8 [2021-11-20 06:28:39,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:39,958 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 472 transitions. [2021-11-20 06:28:39,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:39,958 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 472 transitions. [2021-11-20 06:28:39,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 06:28:39,959 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:39,959 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:39,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:40,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:28:40,174 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:40,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:40,175 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2021-11-20 06:28:40,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:28:40,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210724950] [2021-11-20 06:28:40,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:40,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:28:40,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:28:40,177 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:28:40,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 06:28:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:40,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:28:40,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:40,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:40,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:40,379 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:28:40,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210724950] [2021-11-20 06:28:40,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210724950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:40,380 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:40,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 06:28:40,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29201629] [2021-11-20 06:28:40,381 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:40,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:28:40,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:28:40,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:28:40,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:28:40,383 INFO L87 Difference]: Start difference. First operand 296 states and 472 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:40,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:40,733 INFO L93 Difference]: Finished difference Result 417 states and 608 transitions. [2021-11-20 06:28:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:28:40,734 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 06:28:40,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:40,739 INFO L225 Difference]: With dead ends: 417 [2021-11-20 06:28:40,740 INFO L226 Difference]: Without dead ends: 417 [2021-11-20 06:28:40,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:28:40,742 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 210 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:40,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 267 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:28:40,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-11-20 06:28:40,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 352. [2021-11-20 06:28:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 298 states have (on average 1.5335570469798658) internal successors, (457), 327 states have internal predecessors, (457), 14 states have call successors, (14), 10 states have call predecessors, (14), 22 states have return successors, (76), 14 states have call predecessors, (76), 14 states have call successors, (76) [2021-11-20 06:28:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 547 transitions. [2021-11-20 06:28:40,773 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 547 transitions. Word has length 9 [2021-11-20 06:28:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:40,774 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 547 transitions. [2021-11-20 06:28:40,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:40,774 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 547 transitions. [2021-11-20 06:28:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 06:28:40,775 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:40,775 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:40,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:40,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:28:40,989 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:40,990 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2021-11-20 06:28:40,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:28:40,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551290376] [2021-11-20 06:28:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:40,991 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:28:40,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:28:40,992 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:28:40,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 06:28:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:41,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:28:41,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:41,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:41,280 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:28:41,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551290376] [2021-11-20 06:28:41,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551290376] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:41,280 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:41,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-20 06:28:41,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39324994] [2021-11-20 06:28:41,281 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:41,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:28:41,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:28:41,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:28:41,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:28:41,282 INFO L87 Difference]: Start difference. First operand 352 states and 547 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:41,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:41,796 INFO L93 Difference]: Finished difference Result 425 states and 591 transitions. [2021-11-20 06:28:41,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:28:41,797 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 06:28:41,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:41,801 INFO L225 Difference]: With dead ends: 425 [2021-11-20 06:28:41,801 INFO L226 Difference]: Without dead ends: 425 [2021-11-20 06:28:41,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:28:41,802 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 396 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:41,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 241 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:28:41,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-11-20 06:28:41,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 360. [2021-11-20 06:28:41,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 306 states have (on average 1.526143790849673) internal successors, (467), 335 states have internal predecessors, (467), 14 states have call successors, (14), 10 states have call predecessors, (14), 22 states have return successors, (65), 14 states have call predecessors, (65), 14 states have call successors, (65) [2021-11-20 06:28:41,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 546 transitions. [2021-11-20 06:28:41,825 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 546 transitions. Word has length 10 [2021-11-20 06:28:41,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:41,826 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 546 transitions. [2021-11-20 06:28:41,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:41,826 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 546 transitions. [2021-11-20 06:28:41,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 06:28:41,827 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:41,827 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:41,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:42,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:28:42,038 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:42,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:42,039 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2021-11-20 06:28:42,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:28:42,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244202907] [2021-11-20 06:28:42,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:42,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:28:42,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:28:42,041 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:28:42,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 06:28:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:42,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 06:28:42,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:42,378 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 [2021-11-20 06:28:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:42,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:42,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:42,552 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:28:42,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244202907] [2021-11-20 06:28:42,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244202907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:42,552 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:42,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-20 06:28:42,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731402925] [2021-11-20 06:28:42,553 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:42,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:28:42,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:28:42,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:28:42,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:28:42,554 INFO L87 Difference]: Start difference. First operand 360 states and 546 transitions. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:43,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:43,044 INFO L93 Difference]: Finished difference Result 597 states and 869 transitions. [2021-11-20 06:28:43,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:28:43,045 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 06:28:43,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:43,050 INFO L225 Difference]: With dead ends: 597 [2021-11-20 06:28:43,050 INFO L226 Difference]: Without dead ends: 597 [2021-11-20 06:28:43,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:28:43,052 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 257 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:43,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 294 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:28:43,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-20 06:28:43,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 376. [2021-11-20 06:28:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 322 states have (on average 1.5186335403726707) internal successors, (489), 351 states have internal predecessors, (489), 14 states have call successors, (14), 10 states have call predecessors, (14), 22 states have return successors, (65), 14 states have call predecessors, (65), 14 states have call successors, (65) [2021-11-20 06:28:43,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 568 transitions. [2021-11-20 06:28:43,075 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 568 transitions. Word has length 15 [2021-11-20 06:28:43,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:43,075 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 568 transitions. [2021-11-20 06:28:43,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:43,076 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 568 transitions. [2021-11-20 06:28:43,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:28:43,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:43,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:43,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:43,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:28:43,289 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:43,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:43,289 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2021-11-20 06:28:43,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:28:43,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [962754319] [2021-11-20 06:28:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:43,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:28:43,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:28:43,291 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:28:43,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 06:28:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:43,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 06:28:43,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:43,698 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 [2021-11-20 06:28:43,702 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 [2021-11-20 06:28:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:43,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:43,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:28:43,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [962754319] [2021-11-20 06:28:43,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [962754319] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:43,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:43,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-20 06:28:43,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985544203] [2021-11-20 06:28:43,943 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:43,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:28:43,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:28:43,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:28:43,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:28:43,944 INFO L87 Difference]: Start difference. First operand 376 states and 568 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:45,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:45,019 INFO L93 Difference]: Finished difference Result 693 states and 947 transitions. [2021-11-20 06:28:45,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:28:45,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 06:28:45,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:45,025 INFO L225 Difference]: With dead ends: 693 [2021-11-20 06:28:45,026 INFO L226 Difference]: Without dead ends: 693 [2021-11-20 06:28:45,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:28:45,027 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 478 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:45,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 508 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 06:28:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-11-20 06:28:45,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 389. [2021-11-20 06:28:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 335 states have (on average 1.516417910447761) internal successors, (508), 364 states have internal predecessors, (508), 14 states have call successors, (14), 10 states have call predecessors, (14), 22 states have return successors, (65), 14 states have call predecessors, (65), 14 states have call successors, (65) [2021-11-20 06:28:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 587 transitions. [2021-11-20 06:28:45,051 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 587 transitions. Word has length 16 [2021-11-20 06:28:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:45,052 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 587 transitions. [2021-11-20 06:28:45,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:45,052 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 587 transitions. [2021-11-20 06:28:45,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 06:28:45,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:45,053 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:45,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-20 06:28:45,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:28:45,265 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:45,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:45,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199670, now seen corresponding path program 1 times [2021-11-20 06:28:45,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:28:45,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [802985674] [2021-11-20 06:28:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:45,266 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:28:45,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:28:45,267 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:28:45,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 06:28:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:45,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:28:45,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:45,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:45,674 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:28:45,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [802985674] [2021-11-20 06:28:45,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [802985674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:45,674 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:45,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 06:28:45,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201678240] [2021-11-20 06:28:45,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:45,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:28:45,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:28:45,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:28:45,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:45,676 INFO L87 Difference]: Start difference. First operand 389 states and 587 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:45,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:45,725 INFO L93 Difference]: Finished difference Result 375 states and 524 transitions. [2021-11-20 06:28:45,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:28:45,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-20 06:28:45,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:45,731 INFO L225 Difference]: With dead ends: 375 [2021-11-20 06:28:45,731 INFO L226 Difference]: Without dead ends: 375 [2021-11-20 06:28:45,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:45,736 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 27 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:45,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 114 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:28:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-20 06:28:45,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 359. [2021-11-20 06:28:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 312 states have (on average 1.4903846153846154) internal successors, (465), 339 states have internal predecessors, (465), 11 states have call successors, (11), 8 states have call predecessors, (11), 18 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2021-11-20 06:28:45,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 514 transitions. [2021-11-20 06:28:45,760 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 514 transitions. Word has length 18 [2021-11-20 06:28:45,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:45,761 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 514 transitions. [2021-11-20 06:28:45,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:45,761 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 514 transitions. [2021-11-20 06:28:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 06:28:45,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:45,763 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:45,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:45,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:28:45,979 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:45,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:45,981 INFO L85 PathProgramCache]: Analyzing trace with hash -947150002, now seen corresponding path program 1 times [2021-11-20 06:28:45,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:28:45,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [726906431] [2021-11-20 06:28:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:45,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:28:45,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:28:45,984 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:28:46,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 06:28:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:46,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:28:46,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:46,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:47,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:47,810 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:28:47,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [726906431] [2021-11-20 06:28:47,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [726906431] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:47,811 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:47,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-11-20 06:28:47,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992662256] [2021-11-20 06:28:47,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:47,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:28:47,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:28:47,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:28:47,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:28:47,813 INFO L87 Difference]: Start difference. First operand 359 states and 514 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:48,564 INFO L93 Difference]: Finished difference Result 440 states and 600 transitions. [2021-11-20 06:28:48,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:28:48,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-20 06:28:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:48,568 INFO L225 Difference]: With dead ends: 440 [2021-11-20 06:28:48,568 INFO L226 Difference]: Without dead ends: 440 [2021-11-20 06:28:48,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:28:48,569 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 147 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:48,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 290 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:28:48,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-20 06:28:48,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 369. [2021-11-20 06:28:48,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 322 states have (on average 1.4875776397515528) internal successors, (479), 349 states have internal predecessors, (479), 11 states have call successors, (11), 8 states have call predecessors, (11), 18 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2021-11-20 06:28:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 528 transitions. [2021-11-20 06:28:48,585 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 528 transitions. Word has length 20 [2021-11-20 06:28:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:48,586 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 528 transitions. [2021-11-20 06:28:48,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:48,586 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 528 transitions. [2021-11-20 06:28:48,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:28:48,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:48,588 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-20 06:28:48,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:48,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:28:48,800 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:48,801 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 1 times [2021-11-20 06:28:48,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:28:48,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366448087] [2021-11-20 06:28:48,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:48,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:28:48,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:28:48,803 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:28:48,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 06:28:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:48,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:28:48,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:48,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:49,052 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:28:49,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366448087] [2021-11-20 06:28:49,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366448087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:49,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:49,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 06:28:49,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703856011] [2021-11-20 06:28:49,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:49,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:28:49,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:28:49,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:28:49,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:28:49,054 INFO L87 Difference]: Start difference. First operand 369 states and 528 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:49,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:49,180 INFO L93 Difference]: Finished difference Result 507 states and 680 transitions. [2021-11-20 06:28:49,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:28:49,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-20 06:28:49,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:49,184 INFO L225 Difference]: With dead ends: 507 [2021-11-20 06:28:49,185 INFO L226 Difference]: Without dead ends: 507 [2021-11-20 06:28:49,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:28:49,186 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 182 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:49,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 374 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:28:49,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-20 06:28:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 343. [2021-11-20 06:28:49,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 296 states have (on average 1.412162162162162) internal successors, (418), 323 states have internal predecessors, (418), 11 states have call successors, (11), 8 states have call predecessors, (11), 18 states have return successors, (38), 11 states have call predecessors, (38), 11 states have call successors, (38) [2021-11-20 06:28:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 467 transitions. [2021-11-20 06:28:49,208 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 467 transitions. Word has length 22 [2021-11-20 06:28:49,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:49,210 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 467 transitions. [2021-11-20 06:28:49,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:49,211 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 467 transitions. [2021-11-20 06:28:49,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 06:28:49,217 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:49,218 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:49,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:49,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:28:49,440 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:49,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:49,440 INFO L85 PathProgramCache]: Analyzing trace with hash 382694474, now seen corresponding path program 1 times [2021-11-20 06:28:49,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:28:49,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345603702] [2021-11-20 06:28:49,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:49,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:28:49,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:28:49,442 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:28:49,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 06:28:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:49,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:28:49,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:49,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:49,660 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:28:49,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345603702] [2021-11-20 06:28:49,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345603702] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:49,660 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:49,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 06:28:49,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561032299] [2021-11-20 06:28:49,661 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:49,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:28:49,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:28:49,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:28:49,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:49,663 INFO L87 Difference]: Start difference. First operand 343 states and 467 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:28:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:49,670 INFO L93 Difference]: Finished difference Result 266 states and 352 transitions. [2021-11-20 06:28:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:28:49,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-11-20 06:28:49,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:49,673 INFO L225 Difference]: With dead ends: 266 [2021-11-20 06:28:49,673 INFO L226 Difference]: Without dead ends: 266 [2021-11-20 06:28:49,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:28:49,675 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 13 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:49,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 122 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:28:49,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-20 06:28:49,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2021-11-20 06:28:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 227 states have (on average 1.4008810572687225) internal successors, (318), 251 states have internal predecessors, (318), 8 states have call successors, (8), 6 states have call predecessors, (8), 13 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-11-20 06:28:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 352 transitions. [2021-11-20 06:28:49,690 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 352 transitions. Word has length 25 [2021-11-20 06:28:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:49,690 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 352 transitions. [2021-11-20 06:28:49,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:28:49,691 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 352 transitions. [2021-11-20 06:28:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 06:28:49,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:49,694 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:49,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:49,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:28:49,907 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:28:49,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:49,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1752183410, now seen corresponding path program 1 times [2021-11-20 06:28:49,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:28:49,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1700583672] [2021-11-20 06:28:49,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:49,908 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:28:49,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:28:49,909 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:28:49,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 06:28:50,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:28:50,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:50,438 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:28:50,439 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 26 treesize of output 28 [2021-11-20 06:28:50,445 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:28:50,446 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 25 treesize of output 21 [2021-11-20 06:28:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:50,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:02,405 WARN L227 SmtUtils]: Spent 6.69s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:29:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:11,461 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:29:11,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1700583672] [2021-11-20 06:29:11,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1700583672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:11,462 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:29:11,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-11-20 06:29:11,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807480024] [2021-11-20 06:29:11,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:11,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:29:11,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:29:11,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:29:11,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=92, Unknown=5, NotChecked=0, Total=132 [2021-11-20 06:29:11,463 INFO L87 Difference]: Start difference. First operand 266 states and 352 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:29:12,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:12,236 INFO L93 Difference]: Finished difference Result 278 states and 362 transitions. [2021-11-20 06:29:12,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:29:12,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-20 06:29:12,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:12,239 INFO L225 Difference]: With dead ends: 278 [2021-11-20 06:29:12,239 INFO L226 Difference]: Without dead ends: 278 [2021-11-20 06:29:12,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=63, Invalid=142, Unknown=5, NotChecked=0, Total=210 [2021-11-20 06:29:12,240 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 82 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:12,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 377 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 92 Invalid, 0 Unknown, 164 Unchecked, 0.5s Time] [2021-11-20 06:29:12,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-20 06:29:12,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 269. [2021-11-20 06:29:12,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 230 states have (on average 1.3956521739130434) internal successors, (321), 253 states have internal predecessors, (321), 8 states have call successors, (8), 7 states have call predecessors, (8), 13 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2021-11-20 06:29:12,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 355 transitions. [2021-11-20 06:29:12,252 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 355 transitions. Word has length 27 [2021-11-20 06:29:12,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:12,252 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 355 transitions. [2021-11-20 06:29:12,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:29:12,253 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 355 transitions. [2021-11-20 06:29:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 06:29:12,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:12,255 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:12,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:12,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:29:12,467 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:29:12,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:12,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2041807728, now seen corresponding path program 1 times [2021-11-20 06:29:12,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:29:12,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501353256] [2021-11-20 06:29:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:12,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:29:12,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:29:12,470 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:29:12,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 06:29:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:12,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:29:12,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:12,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:13,067 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:29:13,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501353256] [2021-11-20 06:29:13,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501353256] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:13,067 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:29:13,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-20 06:29:13,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374243596] [2021-11-20 06:29:13,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:13,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:29:13,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:29:13,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:29:13,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:29:13,069 INFO L87 Difference]: Start difference. First operand 269 states and 355 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:29:13,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:13,606 INFO L93 Difference]: Finished difference Result 385 states and 472 transitions. [2021-11-20 06:29:13,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:29:13,606 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-11-20 06:29:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:13,609 INFO L225 Difference]: With dead ends: 385 [2021-11-20 06:29:13,609 INFO L226 Difference]: Without dead ends: 385 [2021-11-20 06:29:13,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:29:13,610 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 356 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:13,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 233 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:29:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-11-20 06:29:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 337. [2021-11-20 06:29:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 295 states have (on average 1.3694915254237288) internal successors, (404), 320 states have internal predecessors, (404), 8 states have call successors, (8), 8 states have call predecessors, (8), 16 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:29:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 437 transitions. [2021-11-20 06:29:13,626 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 437 transitions. Word has length 28 [2021-11-20 06:29:13,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:13,628 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 437 transitions. [2021-11-20 06:29:13,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-20 06:29:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 437 transitions. [2021-11-20 06:29:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 06:29:13,631 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:13,631 INFO L514 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] [2021-11-20 06:29:13,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:13,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:29:13,845 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:29:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:13,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1128469823, now seen corresponding path program 1 times [2021-11-20 06:29:13,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:29:13,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [43924373] [2021-11-20 06:29:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:13,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:29:13,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:29:13,848 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:29:13,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 06:29:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:13,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:29:13,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:14,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:14,608 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:29:14,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [43924373] [2021-11-20 06:29:14,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [43924373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:14,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:29:14,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-20 06:29:14,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373674880] [2021-11-20 06:29:14,609 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:14,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:29:14,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:29:14,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:29:14,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:29:14,611 INFO L87 Difference]: Start difference. First operand 337 states and 437 transitions. Second operand has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:29:15,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:15,834 INFO L93 Difference]: Finished difference Result 367 states and 455 transitions. [2021-11-20 06:29:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:29:15,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-11-20 06:29:15,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:15,838 INFO L225 Difference]: With dead ends: 367 [2021-11-20 06:29:15,839 INFO L226 Difference]: Without dead ends: 367 [2021-11-20 06:29:15,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:29:15,844 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 394 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:15,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 312 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:29:15,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-20 06:29:15,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 347. [2021-11-20 06:29:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 304 states have (on average 1.3717105263157894) internal successors, (417), 330 states have internal predecessors, (417), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:29:15,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 450 transitions. [2021-11-20 06:29:15,864 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 450 transitions. Word has length 29 [2021-11-20 06:29:15,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:15,865 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 450 transitions. [2021-11-20 06:29:15,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.777777777777778) internal successors, (52), 7 states have internal predecessors, (52), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:29:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 450 transitions. [2021-11-20 06:29:15,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 06:29:15,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:15,869 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:15,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:16,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:29:16,085 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:29:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:16,086 INFO L85 PathProgramCache]: Analyzing trace with hash -759899757, now seen corresponding path program 1 times [2021-11-20 06:29:16,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:29:16,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009998395] [2021-11-20 06:29:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:16,087 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:29:16,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:29:16,089 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:29:16,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 06:29:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:16,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 06:29:16,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:17,123 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:29:17,124 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 26 treesize of output 28 [2021-11-20 06:29:17,135 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:29:17,136 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 25 treesize of output 21 [2021-11-20 06:29:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:17,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:30,982 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_parse_input_c1_~x~0#1.base_16| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_16|)))))))) (let ((.cse0 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (or (not (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_16| (_ bv1 32)) |c_~#commands~0.base|))))))) (forall ((|v_parse_input_c1_~x~0#1.base_17| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_parse_input_c1_~x~0#1.base_17|))) (let ((.cse1 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (and (bvule .cse1 (select (store |c_#length| |v_parse_input_c1_~x~0#1.base_17| (_ bv1 32)) |c_~#commands~0.base|)) (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse1)))))) is different from true [2021-11-20 06:29:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-20 06:29:32,431 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:29:32,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009998395] [2021-11-20 06:29:32,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009998395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:32,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:29:32,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-11-20 06:29:32,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201614338] [2021-11-20 06:29:32,431 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:32,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:29:32,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:29:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:29:32,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=79, Unknown=3, NotChecked=18, Total=132 [2021-11-20 06:29:32,433 INFO L87 Difference]: Start difference. First operand 347 states and 450 transitions. Second operand has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:29:33,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:33,268 INFO L93 Difference]: Finished difference Result 407 states and 508 transitions. [2021-11-20 06:29:33,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:29:33,268 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-11-20 06:29:33,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:33,271 INFO L225 Difference]: With dead ends: 407 [2021-11-20 06:29:33,271 INFO L226 Difference]: Without dead ends: 407 [2021-11-20 06:29:33,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=57, Invalid=126, Unknown=3, NotChecked=24, Total=210 [2021-11-20 06:29:33,272 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 116 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:33,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 494 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 131 Invalid, 0 Unknown, 232 Unchecked, 0.5s Time] [2021-11-20 06:29:33,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-11-20 06:29:33,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 347. [2021-11-20 06:29:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 304 states have (on average 1.368421052631579) internal successors, (416), 330 states have internal predecessors, (416), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:29:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 449 transitions. [2021-11-20 06:29:33,289 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 449 transitions. Word has length 33 [2021-11-20 06:29:33,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:33,290 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 449 transitions. [2021-11-20 06:29:33,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 9 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:29:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 449 transitions. [2021-11-20 06:29:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:29:33,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:33,291 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:33,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:33,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:29:33,502 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:29:33,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:33,503 INFO L85 PathProgramCache]: Analyzing trace with hash -117381739, now seen corresponding path program 1 times [2021-11-20 06:29:33,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:29:33,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926032779] [2021-11-20 06:29:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:33,504 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:29:33,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:29:33,505 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:29:33,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 06:29:33,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:33,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:29:33,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:34,129 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:29:34,130 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 26 treesize of output 28 [2021-11-20 06:29:34,136 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:29:34,136 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 25 treesize of output 21 [2021-11-20 06:29:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:34,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:48,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:29:48,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926032779] [2021-11-20 06:29:48,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926032779] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:48,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:29:48,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-11-20 06:29:48,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218318449] [2021-11-20 06:29:48,861 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:48,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:29:48,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:29:48,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:29:48,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=135, Unknown=3, NotChecked=0, Total=182 [2021-11-20 06:29:48,863 INFO L87 Difference]: Start difference. First operand 347 states and 449 transitions. Second operand has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 11 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:29:49,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:49,475 INFO L93 Difference]: Finished difference Result 388 states and 492 transitions. [2021-11-20 06:29:49,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:29:49,476 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 11 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-11-20 06:29:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:49,478 INFO L225 Difference]: With dead ends: 388 [2021-11-20 06:29:49,478 INFO L226 Difference]: Without dead ends: 388 [2021-11-20 06:29:49,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=49, Invalid=158, Unknown=3, NotChecked=0, Total=210 [2021-11-20 06:29:49,479 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 158 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:49,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 349 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 138 Unchecked, 0.5s Time] [2021-11-20 06:29:49,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-11-20 06:29:49,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 347. [2021-11-20 06:29:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 304 states have (on average 1.3651315789473684) internal successors, (415), 330 states have internal predecessors, (415), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:29:49,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 448 transitions. [2021-11-20 06:29:49,492 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 448 transitions. Word has length 35 [2021-11-20 06:29:49,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:49,492 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 448 transitions. [2021-11-20 06:29:49,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 11 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:29:49,493 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 448 transitions. [2021-11-20 06:29:49,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 06:29:49,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:49,493 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:49,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:49,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:29:49,706 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr9REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:29:49,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:49,706 INFO L85 PathProgramCache]: Analyzing trace with hash -119227180, now seen corresponding path program 1 times [2021-11-20 06:29:49,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:29:49,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307394314] [2021-11-20 06:29:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:49,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:29:49,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:29:49,708 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:29:49,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 06:29:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:49,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:29:49,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:29:50,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:50,215 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 36 treesize of output 32 [2021-11-20 06:29:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:51,010 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:29:51,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307394314] [2021-11-20 06:29:51,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307394314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:29:51,010 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:29:51,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-11-20 06:29:51,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921969209] [2021-11-20 06:29:51,011 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:29:51,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:29:51,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:29:51,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:29:51,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:29:51,012 INFO L87 Difference]: Start difference. First operand 347 states and 448 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:29:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:51,647 INFO L93 Difference]: Finished difference Result 538 states and 667 transitions. [2021-11-20 06:29:51,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:29:51,656 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-11-20 06:29:51,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:51,659 INFO L225 Difference]: With dead ends: 538 [2021-11-20 06:29:51,659 INFO L226 Difference]: Without dead ends: 538 [2021-11-20 06:29:51,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:29:51,660 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 203 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:51,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 166 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:29:51,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-20 06:29:51,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 346. [2021-11-20 06:29:51,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 304 states have (on average 1.3486842105263157) internal successors, (410), 329 states have internal predecessors, (410), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:29:51,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 443 transitions. [2021-11-20 06:29:51,674 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 443 transitions. Word has length 35 [2021-11-20 06:29:51,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:51,675 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 443 transitions. [2021-11-20 06:29:51,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:29:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 443 transitions. [2021-11-20 06:29:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 06:29:51,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:51,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:51,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-20 06:29:51,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:29:51,888 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:29:51,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:51,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1271207958, now seen corresponding path program 1 times [2021-11-20 06:29:51,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:29:51,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414494641] [2021-11-20 06:29:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:51,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:29:51,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:29:51,889 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:29:51,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 06:29:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:51,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:29:51,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:52,436 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 40 treesize of output 28 [2021-11-20 06:29:52,443 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 13 [2021-11-20 06:29:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:52,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:54,189 INFO L354 Elim1Store]: treesize reduction 10, result has 33.3 percent of original size [2021-11-20 06:29:54,190 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 46 treesize of output 36 [2021-11-20 06:29:54,198 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-11-20 06:29:54,198 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 32 treesize of output 17 [2021-11-20 06:29:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:54,248 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:29:54,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414494641] [2021-11-20 06:29:54,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414494641] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:54,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:29:54,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 06:29:54,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008954169] [2021-11-20 06:29:54,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:54,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:29:54,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:29:54,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:29:54,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:29:54,251 INFO L87 Difference]: Start difference. First operand 346 states and 443 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:29:54,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:54,817 INFO L93 Difference]: Finished difference Result 430 states and 532 transitions. [2021-11-20 06:29:54,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:29:54,818 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-11-20 06:29:54,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:54,820 INFO L225 Difference]: With dead ends: 430 [2021-11-20 06:29:54,820 INFO L226 Difference]: Without dead ends: 430 [2021-11-20 06:29:54,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:29:54,822 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 207 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:54,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 354 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:29:54,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-11-20 06:29:54,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 364. [2021-11-20 06:29:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 322 states have (on average 1.329192546583851) internal successors, (428), 347 states have internal predecessors, (428), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:29:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 461 transitions. [2021-11-20 06:29:54,835 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 461 transitions. Word has length 39 [2021-11-20 06:29:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:54,835 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 461 transitions. [2021-11-20 06:29:54,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:29:54,835 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 461 transitions. [2021-11-20 06:29:54,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-20 06:29:54,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:54,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:54,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:55,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:29:55,048 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:29:55,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:55,049 INFO L85 PathProgramCache]: Analyzing trace with hash 753387604, now seen corresponding path program 1 times [2021-11-20 06:29:55,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:29:55,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490776613] [2021-11-20 06:29:55,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:55,049 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:29:55,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:29:55,052 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:29:55,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 06:29:55,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:55,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:29:55,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:55,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:29:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:55,443 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:29:55,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490776613] [2021-11-20 06:29:55,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490776613] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:29:55,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:29:55,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-11-20 06:29:55,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697133949] [2021-11-20 06:29:55,444 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:29:55,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:29:55,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:29:55,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:29:55,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:29:55,445 INFO L87 Difference]: Start difference. First operand 364 states and 461 transitions. Second operand has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:29:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:29:55,487 INFO L93 Difference]: Finished difference Result 365 states and 460 transitions. [2021-11-20 06:29:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:29:55,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-11-20 06:29:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:29:55,490 INFO L225 Difference]: With dead ends: 365 [2021-11-20 06:29:55,490 INFO L226 Difference]: Without dead ends: 365 [2021-11-20 06:29:55,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:29:55,491 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 48 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:29:55,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 107 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:29:55,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-20 06:29:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 362. [2021-11-20 06:29:55,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 322 states have (on average 1.3167701863354038) internal successors, (424), 345 states have internal predecessors, (424), 8 states have call successors, (8), 8 states have call predecessors, (8), 17 states have return successors, (25), 8 states have call predecessors, (25), 8 states have call successors, (25) [2021-11-20 06:29:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 457 transitions. [2021-11-20 06:29:55,503 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 457 transitions. Word has length 40 [2021-11-20 06:29:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:29:55,503 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 457 transitions. [2021-11-20 06:29:55,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.333333333333334) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:29:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 457 transitions. [2021-11-20 06:29:55,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:29:55,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:29:55,505 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:29:55,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 06:29:55,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:29:55,720 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:29:55,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:29:55,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1556115366, now seen corresponding path program 1 times [2021-11-20 06:29:55,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:29:55,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188823679] [2021-11-20 06:29:55,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:29:55,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:29:55,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:29:55,723 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:29:55,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 06:29:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:29:55,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:29:55,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:29:56,374 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:29:56,374 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 [2021-11-20 06:29:56,382 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:29:56,383 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 [2021-11-20 06:29:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:29:56,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:30:03,419 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_parse_input_c1_~x~0#1.base_36| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_36|))) (let ((.cse0 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (or (not (bvule .cse0 (select (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_36| (_ bv1 32)) |c_~#commands~0.base|))) (not (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse0)))))) (let ((.cse1 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (and (bvule .cse1 (select |c_#length| |c_~#commands~0.base|)) (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse1)))) is different from true [2021-11-20 06:30:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:30:05,545 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:30:05,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188823679] [2021-11-20 06:30:05,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188823679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:30:05,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:30:05,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-11-20 06:30:05,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274364571] [2021-11-20 06:30:05,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:30:05,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:30:05,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:30:05,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:30:05,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=120, Unknown=2, NotChecked=22, Total=182 [2021-11-20 06:30:05,547 INFO L87 Difference]: Start difference. First operand 362 states and 457 transitions. Second operand has 14 states, 13 states have (on average 5.846153846153846) internal successors, (76), 11 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:30:07,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:07,357 INFO L93 Difference]: Finished difference Result 490 states and 594 transitions. [2021-11-20 06:30:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:30:07,359 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.846153846153846) internal successors, (76), 11 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-11-20 06:30:07,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:07,362 INFO L225 Difference]: With dead ends: 490 [2021-11-20 06:30:07,362 INFO L226 Difference]: Without dead ends: 490 [2021-11-20 06:30:07,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=73, Invalid=235, Unknown=2, NotChecked=32, Total=342 [2021-11-20 06:30:07,364 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 180 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 369 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:07,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 423 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 102 Invalid, 0 Unknown, 369 Unchecked, 0.8s Time] [2021-11-20 06:30:07,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-11-20 06:30:07,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 410. [2021-11-20 06:30:07,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 366 states have (on average 1.3087431693989071) internal successors, (479), 391 states have internal predecessors, (479), 9 states have call successors, (9), 9 states have call predecessors, (9), 20 states have return successors, (30), 9 states have call predecessors, (30), 9 states have call successors, (30) [2021-11-20 06:30:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 518 transitions. [2021-11-20 06:30:07,378 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 518 transitions. Word has length 41 [2021-11-20 06:30:07,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:07,379 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 518 transitions. [2021-11-20 06:30:07,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.846153846153846) internal successors, (76), 11 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:30:07,379 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 518 transitions. [2021-11-20 06:30:07,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:30:07,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:07,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:07,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-20 06:30:07,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:30:07,592 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:30:07,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:07,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1880179342, now seen corresponding path program 1 times [2021-11-20 06:30:07,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:30:07,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855803242] [2021-11-20 06:30:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:07,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:30:07,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:30:07,595 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:30:07,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 06:30:07,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:07,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:30:07,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:30:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:30:08,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:30:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:30:08,284 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:30:08,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855803242] [2021-11-20 06:30:08,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855803242] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:30:08,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:30:08,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-11-20 06:30:08,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924328569] [2021-11-20 06:30:08,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:30:08,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:30:08,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:30:08,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:30:08,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:30:08,286 INFO L87 Difference]: Start difference. First operand 410 states and 518 transitions. Second operand has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:30:08,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:08,554 INFO L93 Difference]: Finished difference Result 370 states and 450 transitions. [2021-11-20 06:30:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:30:08,558 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-11-20 06:30:08,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:08,561 INFO L225 Difference]: With dead ends: 370 [2021-11-20 06:30:08,561 INFO L226 Difference]: Without dead ends: 370 [2021-11-20 06:30:08,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:30:08,562 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 109 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:08,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 219 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:30:08,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-11-20 06:30:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 348. [2021-11-20 06:30:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 312 states have (on average 1.2916666666666667) internal successors, (403), 331 states have internal predecessors, (403), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-11-20 06:30:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 431 transitions. [2021-11-20 06:30:08,573 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 431 transitions. Word has length 41 [2021-11-20 06:30:08,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:08,573 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 431 transitions. [2021-11-20 06:30:08,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.666666666666666) internal successors, (76), 7 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:30:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 431 transitions. [2021-11-20 06:30:08,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 06:30:08,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:08,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:08,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-20 06:30:08,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:30:08,787 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:30:08,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:08,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1843982442, now seen corresponding path program 1 times [2021-11-20 06:30:08,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:30:08,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236393278] [2021-11-20 06:30:08,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:08,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:30:08,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:30:08,788 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:30:08,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 06:30:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:08,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:30:08,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:30:08,967 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 [2021-11-20 06:30:09,071 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-20 06:30:09,071 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 15 treesize of output 20 [2021-11-20 06:30:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:30:09,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:30:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:30:09,273 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:30:09,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236393278] [2021-11-20 06:30:09,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236393278] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:30:09,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:30:09,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-11-20 06:30:09,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241678579] [2021-11-20 06:30:09,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:30:09,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:30:09,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:30:09,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:30:09,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:30:09,275 INFO L87 Difference]: Start difference. First operand 348 states and 431 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:30:09,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:09,451 INFO L93 Difference]: Finished difference Result 372 states and 450 transitions. [2021-11-20 06:30:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 06:30:09,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-20 06:30:09,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:09,454 INFO L225 Difference]: With dead ends: 372 [2021-11-20 06:30:09,455 INFO L226 Difference]: Without dead ends: 372 [2021-11-20 06:30:09,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:30:09,456 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 33 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:09,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 159 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:30:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-11-20 06:30:09,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 356. [2021-11-20 06:30:09,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 320 states have (on average 1.284375) internal successors, (411), 339 states have internal predecessors, (411), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-11-20 06:30:09,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 439 transitions. [2021-11-20 06:30:09,467 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 439 transitions. Word has length 42 [2021-11-20 06:30:09,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:09,467 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 439 transitions. [2021-11-20 06:30:09,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:30:09,468 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 439 transitions. [2021-11-20 06:30:09,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 06:30:09,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:09,469 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:09,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Ended with exit code 0 [2021-11-20 06:30:09,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:30:09,682 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:30:09,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:09,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1458472979, now seen corresponding path program 1 times [2021-11-20 06:30:09,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:30:09,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1956688963] [2021-11-20 06:30:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:09,683 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:30:09,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:30:09,684 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:30:09,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 06:30:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:30:09,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:30:10,615 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:30:10,616 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 38 treesize of output 40 [2021-11-20 06:30:10,629 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-20 06:30:10,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 35 [2021-11-20 06:30:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:30:10,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:30:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:30:33,982 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:30:33,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1956688963] [2021-11-20 06:30:33,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1956688963] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:30:33,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:30:33,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-11-20 06:30:33,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459887484] [2021-11-20 06:30:33,983 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:30:33,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:30:33,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:30:33,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:30:33,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=109, Unknown=5, NotChecked=0, Total=156 [2021-11-20 06:30:33,985 INFO L87 Difference]: Start difference. First operand 356 states and 439 transitions. Second operand has 13 states, 12 states have (on average 5.25) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:30:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:34,603 INFO L93 Difference]: Finished difference Result 381 states and 470 transitions. [2021-11-20 06:30:34,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:30:34,605 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.25) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-11-20 06:30:34,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:34,607 INFO L225 Difference]: With dead ends: 381 [2021-11-20 06:30:34,607 INFO L226 Difference]: Without dead ends: 381 [2021-11-20 06:30:34,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=57, Invalid=148, Unknown=5, NotChecked=0, Total=210 [2021-11-20 06:30:34,609 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 103 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:34,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 195 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 113 Unchecked, 0.4s Time] [2021-11-20 06:30:34,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-20 06:30:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 360. [2021-11-20 06:30:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 323 states have (on average 1.2817337461300309) internal successors, (414), 341 states have internal predecessors, (414), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-20 06:30:34,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 446 transitions. [2021-11-20 06:30:34,619 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 446 transitions. Word has length 48 [2021-11-20 06:30:34,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:34,620 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 446 transitions. [2021-11-20 06:30:34,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.25) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:30:34,620 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 446 transitions. [2021-11-20 06:30:34,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 06:30:34,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:34,621 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:34,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 06:30:34,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:30:34,833 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:30:34,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:34,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1063114569, now seen corresponding path program 2 times [2021-11-20 06:30:34,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:30:34,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410335845] [2021-11-20 06:30:34,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:30:34,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:30:34,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:30:34,835 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:30:34,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 06:30:34,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:30:34,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:30:34,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:30:34,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:30:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:30:35,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:30:35,580 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 22 treesize of output 18 [2021-11-20 06:30:36,057 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 15 [2021-11-20 06:30:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:30:36,975 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:30:36,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410335845] [2021-11-20 06:30:36,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410335845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:30:36,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:30:36,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2021-11-20 06:30:36,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203540805] [2021-11-20 06:30:36,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:30:36,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:30:36,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:30:36,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:30:36,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:30:36,977 INFO L87 Difference]: Start difference. First operand 360 states and 446 transitions. Second operand has 13 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:30:37,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:37,653 INFO L93 Difference]: Finished difference Result 436 states and 519 transitions. [2021-11-20 06:30:37,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:30:37,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-11-20 06:30:37,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:37,656 INFO L225 Difference]: With dead ends: 436 [2021-11-20 06:30:37,656 INFO L226 Difference]: Without dead ends: 436 [2021-11-20 06:30:37,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:30:37,657 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 454 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:37,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 202 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:30:37,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-11-20 06:30:37,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 370. [2021-11-20 06:30:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 333 states have (on average 1.2732732732732732) internal successors, (424), 351 states have internal predecessors, (424), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-20 06:30:37,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 456 transitions. [2021-11-20 06:30:37,668 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 456 transitions. Word has length 48 [2021-11-20 06:30:37,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:37,668 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 456 transitions. [2021-11-20 06:30:37,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:30:37,669 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 456 transitions. [2021-11-20 06:30:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 06:30:37,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:37,670 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:37,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-20 06:30:37,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:30:37,881 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:30:37,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:37,882 INFO L85 PathProgramCache]: Analyzing trace with hash -639148643, now seen corresponding path program 1 times [2021-11-20 06:30:37,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:30:37,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730209592] [2021-11-20 06:30:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:37,883 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:30:37,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:30:37,884 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:30:37,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 06:30:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:37,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:30:37,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:30:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 06:30:38,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:30:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 06:30:38,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:30:38,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730209592] [2021-11-20 06:30:38,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730209592] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 06:30:38,156 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:30:38,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 06:30:38,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703305943] [2021-11-20 06:30:38,156 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 06:30:38,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:30:38,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:30:38,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:30:38,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:30:38,157 INFO L87 Difference]: Start difference. First operand 370 states and 456 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:30:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:38,162 INFO L93 Difference]: Finished difference Result 314 states and 370 transitions. [2021-11-20 06:30:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:30:38,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-11-20 06:30:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:38,164 INFO L225 Difference]: With dead ends: 314 [2021-11-20 06:30:38,165 INFO L226 Difference]: Without dead ends: 314 [2021-11-20 06:30:38,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:30:38,166 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 4 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:38,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 100 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:30:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-20 06:30:38,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 299. [2021-11-20 06:30:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 271 states have (on average 1.2177121771217712) internal successors, (330), 282 states have internal predecessors, (330), 8 states have call successors, (8), 8 states have call predecessors, (8), 11 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-20 06:30:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 354 transitions. [2021-11-20 06:30:38,175 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 354 transitions. Word has length 47 [2021-11-20 06:30:38,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:38,175 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 354 transitions. [2021-11-20 06:30:38,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-20 06:30:38,176 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 354 transitions. [2021-11-20 06:30:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 06:30:38,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:38,177 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:38,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-20 06:30:38,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:30:38,389 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:30:38,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:38,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1430370035, now seen corresponding path program 2 times [2021-11-20 06:30:38,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:30:38,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1188737363] [2021-11-20 06:30:38,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:30:38,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:30:38,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:30:38,391 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:30:38,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 06:30:38,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:30:38,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:30:38,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:30:38,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:30:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:30:39,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:30:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 31 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 06:30:40,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:30:40,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1188737363] [2021-11-20 06:30:40,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1188737363] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:30:40,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:30:40,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-11-20 06:30:40,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370996102] [2021-11-20 06:30:40,401 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:30:40,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:30:40,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:30:40,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:30:40,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-20 06:30:40,402 INFO L87 Difference]: Start difference. First operand 299 states and 354 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:30:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:40,944 INFO L93 Difference]: Finished difference Result 280 states and 319 transitions. [2021-11-20 06:30:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:30:40,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2021-11-20 06:30:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:40,946 INFO L225 Difference]: With dead ends: 280 [2021-11-20 06:30:40,946 INFO L226 Difference]: Without dead ends: 280 [2021-11-20 06:30:40,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:30:40,947 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 97 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:40,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 355 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 06:30:40,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-20 06:30:40,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 261. [2021-11-20 06:30:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 236 states have (on average 1.1991525423728813) internal successors, (283), 246 states have internal predecessors, (283), 7 states have call successors, (7), 7 states have call predecessors, (7), 9 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 06:30:40,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 303 transitions. [2021-11-20 06:30:40,956 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 303 transitions. Word has length 49 [2021-11-20 06:30:40,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:40,956 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 303 transitions. [2021-11-20 06:30:40,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 06:30:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 303 transitions. [2021-11-20 06:30:40,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 06:30:40,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:40,958 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:40,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Ended with exit code 0 [2021-11-20 06:30:41,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:30:41,170 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:30:41,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:41,170 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2021-11-20 06:30:41,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:30:41,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362623721] [2021-11-20 06:30:41,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:41,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:30:41,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:30:41,173 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:30:41,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 06:30:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:41,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:30:41,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:30:41,500 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:30:41,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:30:41,916 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:30:41,917 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:30:41,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362623721] [2021-11-20 06:30:41,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362623721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:30:41,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:30:41,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-20 06:30:41,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351166266] [2021-11-20 06:30:41,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:30:41,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:30:41,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:30:41,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:30:41,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:30:41,920 INFO L87 Difference]: Start difference. First operand 261 states and 303 transitions. Second operand has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:30:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:30:42,335 INFO L93 Difference]: Finished difference Result 281 states and 313 transitions. [2021-11-20 06:30:42,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 06:30:42,336 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2021-11-20 06:30:42,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:30:42,338 INFO L225 Difference]: With dead ends: 281 [2021-11-20 06:30:42,338 INFO L226 Difference]: Without dead ends: 281 [2021-11-20 06:30:42,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:30:42,339 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 221 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:30:42,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 172 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:30:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-20 06:30:42,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 261. [2021-11-20 06:30:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 236 states have (on average 1.1864406779661016) internal successors, (280), 246 states have internal predecessors, (280), 7 states have call successors, (7), 7 states have call predecessors, (7), 9 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 06:30:42,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 300 transitions. [2021-11-20 06:30:42,348 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 300 transitions. Word has length 51 [2021-11-20 06:30:42,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:30:42,348 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 300 transitions. [2021-11-20 06:30:42,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.5) internal successors, (36), 6 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-20 06:30:42,349 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 300 transitions. [2021-11-20 06:30:42,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 06:30:42,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:30:42,350 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:30:42,366 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-20 06:30:42,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:30:42,563 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:30:42,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:30:42,563 INFO L85 PathProgramCache]: Analyzing trace with hash -563187969, now seen corresponding path program 1 times [2021-11-20 06:30:42,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:30:42,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250413199] [2021-11-20 06:30:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:30:42,564 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:30:42,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:30:42,565 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:30:42,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 06:30:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:30:42,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:30:42,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:30:42,969 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 06:30:42,969 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 28 [2021-11-20 06:30:43,649 INFO L354 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2021-11-20 06:30:43,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 56 treesize of output 64 [2021-11-20 06:30:47,923 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:30:47,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:31:07,553 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:31:07,553 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:31:07,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250413199] [2021-11-20 06:31:07,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250413199] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:31:07,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:31:07,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2021-11-20 06:31:07,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549436887] [2021-11-20 06:31:07,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:31:07,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 06:31:07,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:31:07,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 06:31:07,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=359, Unknown=7, NotChecked=0, Total=462 [2021-11-20 06:31:07,555 INFO L87 Difference]: Start difference. First operand 261 states and 300 transitions. Second operand has 22 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:31:36,407 WARN L227 SmtUtils]: Spent 22.25s on a formula simplification. DAG size of input: 83 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:31:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:31:36,596 INFO L93 Difference]: Finished difference Result 310 states and 347 transitions. [2021-11-20 06:31:36,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 06:31:36,596 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2021-11-20 06:31:36,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:31:36,598 INFO L225 Difference]: With dead ends: 310 [2021-11-20 06:31:36,598 INFO L226 Difference]: Without dead ends: 310 [2021-11-20 06:31:36,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=191, Invalid=669, Unknown=10, NotChecked=0, Total=870 [2021-11-20 06:31:36,599 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 184 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:31:36,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 425 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 191 Unchecked, 0.2s Time] [2021-11-20 06:31:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-11-20 06:31:36,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 290. [2021-11-20 06:31:36,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 264 states have (on average 1.1742424242424243) internal successors, (310), 275 states have internal predecessors, (310), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 06:31:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 330 transitions. [2021-11-20 06:31:36,606 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 330 transitions. Word has length 51 [2021-11-20 06:31:36,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:31:36,607 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 330 transitions. [2021-11-20 06:31:36,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 4.842105263157895) internal successors, (92), 19 states have internal predecessors, (92), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:31:36,607 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 330 transitions. [2021-11-20 06:31:36,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 06:31:36,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:31:36,608 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:31:36,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-20 06:31:36,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:31:36,821 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:31:36,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:31:36,822 INFO L85 PathProgramCache]: Analyzing trace with hash -563187968, now seen corresponding path program 1 times [2021-11-20 06:31:36,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:31:36,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556304243] [2021-11-20 06:31:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:31:36,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:31:36,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:31:36,823 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:31:36,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 06:31:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:31:36,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:31:36,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:31:37,396 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:31:37,396 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 [2021-11-20 06:31:37,405 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:31:37,405 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 [2021-11-20 06:31:37,687 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:31:37,687 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 22 treesize of output 22 [2021-11-20 06:31:37,973 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 06:31:37,973 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 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-20 06:31:38,132 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:31:38,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:31:38,532 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:31:38,533 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 34 treesize of output 33 [2021-11-20 06:31:41,167 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:31:41,167 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 29 treesize of output 28 [2021-11-20 06:32:08,012 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 23 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:32:08,013 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:32:08,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556304243] [2021-11-20 06:32:08,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556304243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:32:08,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:32:08,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2021-11-20 06:32:08,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299753138] [2021-11-20 06:32:08,013 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:32:08,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 06:32:08,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:32:08,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 06:32:08,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=204, Unknown=10, NotChecked=0, Total=272 [2021-11-20 06:32:08,014 INFO L87 Difference]: Start difference. First operand 290 states and 330 transitions. Second operand has 17 states, 16 states have (on average 5.75) internal successors, (92), 14 states have internal predecessors, (92), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:32:12,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:32:12,329 INFO L93 Difference]: Finished difference Result 314 states and 350 transitions. [2021-11-20 06:32:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:32:12,331 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.75) internal successors, (92), 14 states have internal predecessors, (92), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 51 [2021-11-20 06:32:12,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:32:12,333 INFO L225 Difference]: With dead ends: 314 [2021-11-20 06:32:12,333 INFO L226 Difference]: Without dead ends: 314 [2021-11-20 06:32:12,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=152, Invalid=437, Unknown=11, NotChecked=0, Total=600 [2021-11-20 06:32:12,334 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 292 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 06:32:12,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 329 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 117 Invalid, 0 Unknown, 215 Unchecked, 0.8s Time] [2021-11-20 06:32:12,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-20 06:32:12,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 290. [2021-11-20 06:32:12,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 264 states have (on average 1.1704545454545454) internal successors, (309), 275 states have internal predecessors, (309), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 06:32:12,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 329 transitions. [2021-11-20 06:32:12,343 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 329 transitions. Word has length 51 [2021-11-20 06:32:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:32:12,343 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 329 transitions. [2021-11-20 06:32:12,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.75) internal successors, (92), 14 states have internal predecessors, (92), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:32:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 329 transitions. [2021-11-20 06:32:12,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 06:32:12,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:32:12,345 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:32:12,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-20 06:32:12,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:32:12,556 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:32:12,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:32:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2021-11-20 06:32:12,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:32:12,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060809837] [2021-11-20 06:32:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:12,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:32:12,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:32:12,558 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:32:12,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-20 06:32:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:12,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:32:12,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:32:12,986 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:32:12,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:32:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-20 06:32:13,473 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:32:13,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060809837] [2021-11-20 06:32:13,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060809837] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:32:13,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:32:13,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-20 06:32:13,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078588680] [2021-11-20 06:32:13,474 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:32:13,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:32:13,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:32:13,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:32:13,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:32:13,475 INFO L87 Difference]: Start difference. First operand 290 states and 329 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:32:14,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:32:14,375 INFO L93 Difference]: Finished difference Result 295 states and 330 transitions. [2021-11-20 06:32:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:32:14,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2021-11-20 06:32:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:32:14,378 INFO L225 Difference]: With dead ends: 295 [2021-11-20 06:32:14,379 INFO L226 Difference]: Without dead ends: 295 [2021-11-20 06:32:14,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:32:14,380 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 217 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:32:14,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 187 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:32:14,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-11-20 06:32:14,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 289. [2021-11-20 06:32:14,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.1553030303030303) internal successors, (305), 274 states have internal predecessors, (305), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 06:32:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 325 transitions. [2021-11-20 06:32:14,390 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 325 transitions. Word has length 52 [2021-11-20 06:32:14,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:32:14,391 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 325 transitions. [2021-11-20 06:32:14,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:32:14,391 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 325 transitions. [2021-11-20 06:32:14,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 06:32:14,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:32:14,392 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:32:14,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-20 06:32:14,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:32:14,607 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:32:14,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:32:14,607 INFO L85 PathProgramCache]: Analyzing trace with hash -278957874, now seen corresponding path program 1 times [2021-11-20 06:32:14,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:32:14,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233447236] [2021-11-20 06:32:14,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:32:14,608 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:32:14,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:32:14,609 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:32:14,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-20 06:32:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:32:14,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:32:14,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:32:15,245 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 06:32:15,245 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 19 treesize of output 26 [2021-11-20 06:32:16,314 INFO L354 Elim1Store]: treesize reduction 90, result has 24.4 percent of original size [2021-11-20 06:32:16,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 50 treesize of output 62 [2021-11-20 06:32:21,036 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 50 treesize of output 34 [2021-11-20 06:32:21,139 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:32:21,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:32:48,416 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 25 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:32:48,417 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:32:48,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233447236] [2021-11-20 06:32:48,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233447236] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:32:48,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:32:48,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2021-11-20 06:32:48,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215006070] [2021-11-20 06:32:48,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:32:48,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 06:32:48,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:32:48,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 06:32:48,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=721, Unknown=9, NotChecked=0, Total=870 [2021-11-20 06:32:48,419 INFO L87 Difference]: Start difference. First operand 289 states and 325 transitions. Second operand has 30 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 23 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:33:02,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:33:02,813 INFO L93 Difference]: Finished difference Result 297 states and 329 transitions. [2021-11-20 06:33:02,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:33:02,814 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 23 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2021-11-20 06:33:02,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:33:02,815 INFO L225 Difference]: With dead ends: 297 [2021-11-20 06:33:02,816 INFO L226 Difference]: Without dead ends: 297 [2021-11-20 06:33:02,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=284, Invalid=1343, Unknown=13, NotChecked=0, Total=1640 [2021-11-20 06:33:02,818 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 262 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 534 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:33:02,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 389 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 246 Invalid, 0 Unknown, 534 Unchecked, 0.6s Time] [2021-11-20 06:33:02,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-20 06:33:02,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 289. [2021-11-20 06:33:02,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 264 states have (on average 1.1515151515151516) internal successors, (304), 274 states have internal predecessors, (304), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 06:33:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 324 transitions. [2021-11-20 06:33:02,826 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 324 transitions. Word has length 52 [2021-11-20 06:33:02,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:33:02,827 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 324 transitions. [2021-11-20 06:33:02,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 23 states have internal predecessors, (94), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:33:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 324 transitions. [2021-11-20 06:33:02,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 06:33:02,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:33:02,829 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:33:02,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-20 06:33:03,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:33:03,044 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:33:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:33:03,045 INFO L85 PathProgramCache]: Analyzing trace with hash -57759457, now seen corresponding path program 1 times [2021-11-20 06:33:03,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:33:03,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1548925267] [2021-11-20 06:33:03,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:33:03,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:33:03,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:33:03,047 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:33:03,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-20 06:33:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:33:03,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:33:03,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:33:03,850 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:33:03,850 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 12 treesize of output 18 [2021-11-20 06:33:04,576 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 06:33:04,577 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 25 treesize of output 25 [2021-11-20 06:33:04,884 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 [2021-11-20 06:33:05,247 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 06:33:05,247 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 3 case distinctions, treesize of input 34 treesize of output 39 [2021-11-20 06:33:05,866 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 42 treesize of output 30 [2021-11-20 06:33:05,871 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 27 treesize of output 19 [2021-11-20 06:33:06,022 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:33:06,022 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 28 treesize of output 28 [2021-11-20 06:33:06,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:06,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:33:06,836 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-20 06:33:06,836 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 39 treesize of output 38 [2021-11-20 06:33:06,858 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 24 treesize of output 18 [2021-11-20 06:33:07,356 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 22 treesize of output 16 [2021-11-20 06:33:10,376 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:33:10,376 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 32 treesize of output 31 [2021-11-20 06:33:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:33:18,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:33:18,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1548925267] [2021-11-20 06:33:18,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1548925267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:33:18,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:33:18,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 30 [2021-11-20 06:33:18,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026183946] [2021-11-20 06:33:18,626 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:33:18,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 06:33:18,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:33:18,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 06:33:18,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=789, Unknown=3, NotChecked=0, Total=992 [2021-11-20 06:33:18,628 INFO L87 Difference]: Start difference. First operand 289 states and 324 transitions. Second operand has 32 states, 29 states have (on average 3.310344827586207) internal successors, (96), 25 states have internal predecessors, (96), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:33:26,726 WARN L227 SmtUtils]: Spent 6.50s on a formula simplification that was a NOOP. DAG size: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:33:43,681 WARN L227 SmtUtils]: Spent 16.41s on a formula simplification. DAG size of input: 46 DAG size of output: 43 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:34:08,180 WARN L227 SmtUtils]: Spent 16.73s on a formula simplification. DAG size of input: 65 DAG size of output: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:34:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:35,754 INFO L93 Difference]: Finished difference Result 302 states and 334 transitions. [2021-11-20 06:34:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-20 06:34:35,755 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 3.310344827586207) internal successors, (96), 25 states have internal predecessors, (96), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 53 [2021-11-20 06:34:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:35,757 INFO L225 Difference]: With dead ends: 302 [2021-11-20 06:34:35,757 INFO L226 Difference]: Without dead ends: 302 [2021-11-20 06:34:35,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 75 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 86.3s TimeCoverageRelationStatistics Valid=764, Invalid=2527, Unknown=15, NotChecked=0, Total=3306 [2021-11-20 06:34:35,759 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 253 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 518 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:35,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 648 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 285 Invalid, 0 Unknown, 518 Unchecked, 0.9s Time] [2021-11-20 06:34:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-20 06:34:35,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 291. [2021-11-20 06:34:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 266 states have (on average 1.1466165413533835) internal successors, (305), 276 states have internal predecessors, (305), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-20 06:34:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 324 transitions. [2021-11-20 06:34:35,768 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 324 transitions. Word has length 53 [2021-11-20 06:34:35,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:35,768 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 324 transitions. [2021-11-20 06:34:35,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 3.310344827586207) internal successors, (96), 25 states have internal predecessors, (96), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:34:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 324 transitions. [2021-11-20 06:34:35,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 06:34:35,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:35,770 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:35,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (34)] Ended with exit code 0 [2021-11-20 06:34:35,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:34:35,982 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:34:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:35,983 INFO L85 PathProgramCache]: Analyzing trace with hash -2076245838, now seen corresponding path program 1 times [2021-11-20 06:34:35,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:34:35,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011038388] [2021-11-20 06:34:35,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:35,984 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:34:35,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:34:35,985 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:34:36,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-20 06:34:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:34:36,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:34:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:34:37,355 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:34:37,355 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 37 treesize of output 39 [2021-11-20 06:34:37,372 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-20 06:34:37,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 34 [2021-11-20 06:34:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:34:37,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:34:49,741 WARN L227 SmtUtils]: Spent 6.63s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:35:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:35:13,525 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:35:13,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011038388] [2021-11-20 06:35:13,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011038388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:35:13,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:35:13,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-11-20 06:35:13,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058320632] [2021-11-20 06:35:13,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:35:13,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 06:35:13,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:35:13,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 06:35:13,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=107, Unknown=7, NotChecked=0, Total=156 [2021-11-20 06:35:13,526 INFO L87 Difference]: Start difference. First operand 291 states and 324 transitions. Second operand has 13 states, 12 states have (on average 6.25) internal successors, (75), 10 states have internal predecessors, (75), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:35:14,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:35:14,110 INFO L93 Difference]: Finished difference Result 321 states and 353 transitions. [2021-11-20 06:35:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 06:35:14,112 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 6.25) internal successors, (75), 10 states have internal predecessors, (75), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2021-11-20 06:35:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:35:14,114 INFO L225 Difference]: With dead ends: 321 [2021-11-20 06:35:14,114 INFO L226 Difference]: Without dead ends: 321 [2021-11-20 06:35:14,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=48, Invalid=127, Unknown=7, NotChecked=0, Total=182 [2021-11-20 06:35:14,115 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 52 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:35:14,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 189 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 100 Unchecked, 0.5s Time] [2021-11-20 06:35:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-20 06:35:14,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 291. [2021-11-20 06:35:14,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 266 states have (on average 1.1428571428571428) internal successors, (304), 276 states have internal predecessors, (304), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-20 06:35:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 323 transitions. [2021-11-20 06:35:14,127 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 323 transitions. Word has length 54 [2021-11-20 06:35:14,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:35:14,128 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 323 transitions. [2021-11-20 06:35:14,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 6.25) internal successors, (75), 10 states have internal predecessors, (75), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:35:14,128 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 323 transitions. [2021-11-20 06:35:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 06:35:14,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:35:14,129 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:35:14,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-20 06:35:14,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:35:14,344 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:35:14,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:35:14,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1790543120, now seen corresponding path program 1 times [2021-11-20 06:35:14,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:35:14,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1030168272] [2021-11-20 06:35:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:35:14,345 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:35:14,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:35:14,345 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:35:14,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-20 06:35:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:35:14,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 06:35:14,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:35:14,689 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 06:35:14,689 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 25 treesize of output 32 [2021-11-20 06:35:15,173 INFO L354 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2021-11-20 06:35:15,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 54 [2021-11-20 06:35:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:35:15,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:35:48,038 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|v_parse_input_c1_~x~0#1.base_101| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select (store (store |c_#valid| |v_parse_input_c1_~x~0#1.base_101| (_ bv1 1)) c_~global~0.base (_ bv0 1)) (_ bv5 32))))) (_ bv1 1))) (not (= (_ bv0 1) (select |c_#valid| |v_parse_input_c1_~x~0#1.base_101|))))) (exists ((|v_parse_input_c1_~x~0#1.base_101| (_ BitVec 32)) (v_~global~0.base_163 (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| v_~global~0.base_163 (_ bv1 1)))) (and (= (_ bv0 1) (select .cse0 |v_parse_input_c1_~x~0#1.base_101|)) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store .cse0 |v_parse_input_c1_~x~0#1.base_101| (_ bv1 1)) v_~global~0.base_163 (_ bv0 1)) (_ bv5 32)))))))))) (_ bv1 1)))) (= (_ bv0 1) (select |c_old(#valid)| v_~global~0.base_163)))))) is different from true [2021-11-20 06:36:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-20 06:36:09,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:36:09,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1030168272] [2021-11-20 06:36:09,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1030168272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:36:09,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:36:09,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-11-20 06:36:09,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576000997] [2021-11-20 06:36:09,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:36:09,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:36:09,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:36:09,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:36:09,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=357, Unknown=18, NotChecked=40, Total=506 [2021-11-20 06:36:09,232 INFO L87 Difference]: Start difference. First operand 291 states and 323 transitions. Second operand has 23 states, 19 states have (on average 5.157894736842105) internal successors, (98), 17 states have internal predecessors, (98), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:36:38,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:36:38,893 INFO L93 Difference]: Finished difference Result 297 states and 327 transitions. [2021-11-20 06:36:38,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:36:38,893 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 5.157894736842105) internal successors, (98), 17 states have internal predecessors, (98), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 54 [2021-11-20 06:36:38,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:36:38,895 INFO L225 Difference]: With dead ends: 297 [2021-11-20 06:36:38,895 INFO L226 Difference]: Without dead ends: 297 [2021-11-20 06:36:38,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 81.8s TimeCoverageRelationStatistics Valid=163, Invalid=683, Unknown=28, NotChecked=56, Total=930 [2021-11-20 06:36:38,897 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 126 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 287 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:36:38,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 510 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 287 Unchecked, 0.2s Time] [2021-11-20 06:36:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-20 06:36:38,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 290. [2021-11-20 06:36:38,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 266 states have (on average 1.1390977443609023) internal successors, (303), 275 states have internal predecessors, (303), 7 states have call successors, (7), 7 states have call predecessors, (7), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-20 06:36:38,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 322 transitions. [2021-11-20 06:36:38,903 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 322 transitions. Word has length 54 [2021-11-20 06:36:38,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:36:38,904 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 322 transitions. [2021-11-20 06:36:38,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 5.157894736842105) internal successors, (98), 17 states have internal predecessors, (98), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:36:38,904 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 322 transitions. [2021-11-20 06:36:38,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:36:38,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:36:38,905 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:36:38,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-20 06:36:39,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:36:39,106 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:36:39,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:36:39,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1889386740, now seen corresponding path program 3 times [2021-11-20 06:36:39,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:36:39,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954158267] [2021-11-20 06:36:39,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:36:39,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:36:39,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:36:39,107 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:36:39,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-20 06:36:39,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:36:39,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:36:39,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 06:36:39,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:36:40,108 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:36:40,108 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 29 treesize of output 31 [2021-11-20 06:36:40,114 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:36:40,114 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 28 treesize of output 24 [2021-11-20 06:36:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:36:40,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:37:09,771 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:37:09,771 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:37:09,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954158267] [2021-11-20 06:37:09,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954158267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:37:09,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:37:09,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-11-20 06:37:09,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835610019] [2021-11-20 06:37:09,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:37:09,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:37:09,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:37:09,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:37:09,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=134, Unknown=4, NotChecked=0, Total=182 [2021-11-20 06:37:09,773 INFO L87 Difference]: Start difference. First operand 290 states and 322 transitions. Second operand has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 11 states have internal predecessors, (72), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:37:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:11,198 INFO L93 Difference]: Finished difference Result 316 states and 343 transitions. [2021-11-20 06:37:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:37:11,199 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 11 states have internal predecessors, (72), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2021-11-20 06:37:11,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:11,201 INFO L225 Difference]: With dead ends: 316 [2021-11-20 06:37:11,201 INFO L226 Difference]: Without dead ends: 316 [2021-11-20 06:37:11,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=98, Invalid=278, Unknown=4, NotChecked=0, Total=380 [2021-11-20 06:37:11,204 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 139 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:11,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 308 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 278 Unchecked, 0.6s Time] [2021-11-20 06:37:11,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-20 06:37:11,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 300. [2021-11-20 06:37:11,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 277 states have (on average 1.1299638989169676) internal successors, (313), 285 states have internal predecessors, (313), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-20 06:37:11,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 330 transitions. [2021-11-20 06:37:11,214 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 330 transitions. Word has length 56 [2021-11-20 06:37:11,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:37:11,215 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 330 transitions. [2021-11-20 06:37:11,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.538461538461538) internal successors, (72), 11 states have internal predecessors, (72), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:37:11,215 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 330 transitions. [2021-11-20 06:37:11,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 06:37:11,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:37:11,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:37:11,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-20 06:37:11,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:37:11,416 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:37:11,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:11,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1423777157, now seen corresponding path program 1 times [2021-11-20 06:37:11,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:37:11,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073224920] [2021-11-20 06:37:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:11,417 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:37:11,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:37:11,418 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:37:11,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-20 06:37:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:11,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 06:37:11,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:11,965 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:37:11,965 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 12 treesize of output 18 [2021-11-20 06:37:12,387 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:37:12,388 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 21 treesize of output 21 [2021-11-20 06:37:12,580 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 [2021-11-20 06:37:12,795 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 06:37:12,795 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 3 case distinctions, treesize of input 30 treesize of output 35 [2021-11-20 06:37:13,249 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:37:13,250 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 29 treesize of output 29 [2021-11-20 06:37:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:13,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:37:14,812 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:37:14,812 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 35 treesize of output 34 [2021-11-20 06:37:14,882 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 15 treesize of output 13 [2021-11-20 06:37:15,669 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 16 treesize of output 14 [2021-11-20 06:37:18,845 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:37:18,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-20 06:37:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:30,680 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:37:30,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073224920] [2021-11-20 06:37:30,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073224920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:37:30,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:37:30,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 23 [2021-11-20 06:37:30,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026557145] [2021-11-20 06:37:30,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:37:30,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:37:30,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:37:30,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:37:30,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=484, Unknown=2, NotChecked=0, Total=600 [2021-11-20 06:37:30,683 INFO L87 Difference]: Start difference. First operand 300 states and 330 transitions. Second operand has 25 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 20 states have internal predecessors, (104), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:37:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:37,169 INFO L93 Difference]: Finished difference Result 329 states and 358 transitions. [2021-11-20 06:37:37,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 06:37:37,171 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 20 states have internal predecessors, (104), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2021-11-20 06:37:37,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:37,173 INFO L225 Difference]: With dead ends: 329 [2021-11-20 06:37:37,174 INFO L226 Difference]: Without dead ends: 329 [2021-11-20 06:37:37,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=201, Invalid=851, Unknown=4, NotChecked=0, Total=1056 [2021-11-20 06:37:37,175 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 147 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:37,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 658 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 102 Invalid, 0 Unknown, 313 Unchecked, 0.7s Time] [2021-11-20 06:37:37,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-20 06:37:37,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 300. [2021-11-20 06:37:37,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 277 states have (on average 1.1263537906137184) internal successors, (312), 285 states have internal predecessors, (312), 7 states have call successors, (7), 7 states have call predecessors, (7), 10 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-20 06:37:37,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 329 transitions. [2021-11-20 06:37:37,184 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 329 transitions. Word has length 57 [2021-11-20 06:37:37,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:37:37,185 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 329 transitions. [2021-11-20 06:37:37,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 20 states have internal predecessors, (104), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:37:37,185 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 329 transitions. [2021-11-20 06:37:37,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 06:37:37,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:37:37,187 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:37:37,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-20 06:37:37,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:37:37,404 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:37:37,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:37,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1452589751, now seen corresponding path program 1 times [2021-11-20 06:37:37,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:37:37,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [774421364] [2021-11-20 06:37:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:37,405 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:37:37,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:37:37,405 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:37:37,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-20 06:37:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:37,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 06:37:37,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:38,122 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 22 treesize of output 10 [2021-11-20 06:37:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:37:38,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:37:38,653 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 24 treesize of output 12 [2021-11-20 06:37:39,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:37:39,241 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 27 treesize of output 27 [2021-11-20 06:37:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 28 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:37:40,935 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:37:40,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [774421364] [2021-11-20 06:37:40,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [774421364] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:37:40,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:37:40,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-11-20 06:37:40,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044610513] [2021-11-20 06:37:40,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:37:40,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:37:40,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:37:40,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:37:40,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-20 06:37:40,938 INFO L87 Difference]: Start difference. First operand 300 states and 329 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 17 states have internal predecessors, (87), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:37:41,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:37:41,821 INFO L93 Difference]: Finished difference Result 316 states and 336 transitions. [2021-11-20 06:37:41,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:37:41,822 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 17 states have internal predecessors, (87), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2021-11-20 06:37:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:37:41,823 INFO L225 Difference]: With dead ends: 316 [2021-11-20 06:37:41,823 INFO L226 Difference]: Without dead ends: 316 [2021-11-20 06:37:41,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=194, Invalid=562, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:37:41,824 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 187 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:37:41,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 342 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 149 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2021-11-20 06:37:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-20 06:37:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 255. [2021-11-20 06:37:41,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 235 states have (on average 1.097872340425532) internal successors, (258), 242 states have internal predecessors, (258), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-20 06:37:41,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 273 transitions. [2021-11-20 06:37:41,829 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 273 transitions. Word has length 58 [2021-11-20 06:37:41,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:37:41,830 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 273 transitions. [2021-11-20 06:37:41,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 17 states have internal predecessors, (87), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:37:41,830 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 273 transitions. [2021-11-20 06:37:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:37:41,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:37:41,831 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:37:41,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-11-20 06:37:42,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:37:42,049 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:37:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:37:42,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1294554201, now seen corresponding path program 1 times [2021-11-20 06:37:42,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:37:42,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1754208307] [2021-11-20 06:37:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:37:42,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:37:42,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:37:42,051 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:37:42,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-20 06:37:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:37:42,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 06:37:42,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:37:42,644 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 06:37:42,645 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 24 treesize of output 31 [2021-11-20 06:37:43,319 INFO L354 Elim1Store]: treesize reduction 58, result has 26.6 percent of original size [2021-11-20 06:37:43,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 62 [2021-11-20 06:37:44,322 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 [2021-11-20 06:37:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:37:44,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:38:14,122 WARN L227 SmtUtils]: Spent 6.78s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:38:16,255 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_parse_input_c1_~x~0#1.base_125| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_125|))) (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select (store (store |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_125| (_ bv1 1)) |c_old(~global~0.base)| (_ bv0 1)) (select (select |c_#memory_$Pointer$.base| |c_~#commands~0.base|) (bvadd |c_~#commands~0.offset| (_ bv9 32))))))))))))) (forall ((|v_parse_input_c1_~x~0#1.base_126| (_ BitVec 32))) (or (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select (store (store |c_#valid| |v_parse_input_c1_~x~0#1.base_126| (_ bv1 1)) c_~global~0.base (_ bv0 1)) (select (select |c_#memory_$Pointer$.base| |c_~#commands~0.base|) (bvadd |c_~#commands~0.offset| (_ bv9 32))))))))))) (not (= (_ bv0 1) (select |c_#valid| |v_parse_input_c1_~x~0#1.base_126|)))))) is different from true [2021-11-20 06:38:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 24 not checked. [2021-11-20 06:38:52,697 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:38:52,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1754208307] [2021-11-20 06:38:52,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1754208307] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:38:52,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:38:52,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2021-11-20 06:38:52,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121980939] [2021-11-20 06:38:52,698 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:38:52,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 06:38:52,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:38:52,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 06:38:52,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=478, Unknown=22, NotChecked=46, Total=650 [2021-11-20 06:38:52,700 INFO L87 Difference]: Start difference. First operand 255 states and 273 transitions. Second operand has 26 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:39:01,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:01,664 INFO L93 Difference]: Finished difference Result 256 states and 274 transitions. [2021-11-20 06:39:01,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:39:01,665 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 60 [2021-11-20 06:39:01,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:01,666 INFO L225 Difference]: With dead ends: 256 [2021-11-20 06:39:01,666 INFO L226 Difference]: Without dead ends: 256 [2021-11-20 06:39:01,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 75.6s TimeCoverageRelationStatistics Valid=126, Invalid=610, Unknown=24, NotChecked=52, Total=812 [2021-11-20 06:39:01,667 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 54 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:01,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 346 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 224 Unchecked, 0.2s Time] [2021-11-20 06:39:01,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-20 06:39:01,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 254. [2021-11-20 06:39:01,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 235 states have (on average 1.0936170212765957) internal successors, (257), 241 states have internal predecessors, (257), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-20 06:39:01,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 272 transitions. [2021-11-20 06:39:01,673 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 272 transitions. Word has length 60 [2021-11-20 06:39:01,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:01,673 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 272 transitions. [2021-11-20 06:39:01,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 4.782608695652174) internal successors, (110), 21 states have internal predecessors, (110), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:39:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 272 transitions. [2021-11-20 06:39:01,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-20 06:39:01,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:01,674 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:01,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:01,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:01,888 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:39:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:01,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1476474522, now seen corresponding path program 1 times [2021-11-20 06:39:01,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:01,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [404170497] [2021-11-20 06:39:01,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:01,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:01,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:01,893 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:01,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-20 06:39:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:02,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 06:39:02,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:02,683 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:39:02,683 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 12 treesize of output 18 [2021-11-20 06:39:03,374 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 [2021-11-20 06:39:03,659 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-11-20 06:39:03,659 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 3 case distinctions, treesize of input 28 treesize of output 45 [2021-11-20 06:39:06,870 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 [2021-11-20 06:39:06,875 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 [2021-11-20 06:39:06,991 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:39:06,991 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 38 treesize of output 38 [2021-11-20 06:39:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:39:07,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:07,987 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 27 treesize of output 19 [2021-11-20 06:39:08,471 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 26 treesize of output 18 [2021-11-20 06:39:11,691 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:39:11,691 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:39:11,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [404170497] [2021-11-20 06:39:11,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [404170497] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:11,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:11,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2021-11-20 06:39:11,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375556192] [2021-11-20 06:39:11,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:11,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:39:11,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:39:11,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:39:11,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:39:11,693 INFO L87 Difference]: Start difference. First operand 254 states and 272 transitions. Second operand has 28 states, 25 states have (on average 4.48) internal successors, (112), 23 states have internal predecessors, (112), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:39:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:14,641 INFO L93 Difference]: Finished difference Result 264 states and 282 transitions. [2021-11-20 06:39:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:39:14,642 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 4.48) internal successors, (112), 23 states have internal predecessors, (112), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 61 [2021-11-20 06:39:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:14,643 INFO L225 Difference]: With dead ends: 264 [2021-11-20 06:39:14,643 INFO L226 Difference]: Without dead ends: 264 [2021-11-20 06:39:14,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 06:39:14,645 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 99 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:14,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 749 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 208 Unchecked, 0.3s Time] [2021-11-20 06:39:14,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-20 06:39:14,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 253. [2021-11-20 06:39:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 235 states have (on average 1.0893617021276596) internal successors, (256), 240 states have internal predecessors, (256), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-20 06:39:14,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 271 transitions. [2021-11-20 06:39:14,651 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 271 transitions. Word has length 61 [2021-11-20 06:39:14,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:14,651 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 271 transitions. [2021-11-20 06:39:14,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 4.48) internal successors, (112), 23 states have internal predecessors, (112), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:39:14,652 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 271 transitions. [2021-11-20 06:39:14,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:39:14,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:14,654 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:14,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:14,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:14,868 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:39:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:14,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1946408839, now seen corresponding path program 2 times [2021-11-20 06:39:14,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:14,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629327337] [2021-11-20 06:39:14,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:39:14,869 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:14,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:14,870 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:14,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-20 06:39:15,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:39:15,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:39:15,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:39:15,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:15,939 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:39:15,939 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 36 treesize of output 38 [2021-11-20 06:39:15,962 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-20 06:39:15,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 33 [2021-11-20 06:39:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:39:16,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:39:43,653 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:39:43,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629327337] [2021-11-20 06:39:43,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629327337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:43,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:43,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-11-20 06:39:43,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668366733] [2021-11-20 06:39:43,654 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:43,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:39:43,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:39:43,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:39:43,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=133, Unknown=5, NotChecked=0, Total=182 [2021-11-20 06:39:43,655 INFO L87 Difference]: Start difference. First operand 253 states and 271 transitions. Second operand has 14 states, 13 states have (on average 6.461538461538462) internal successors, (84), 11 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:39:44,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:44,183 INFO L93 Difference]: Finished difference Result 294 states and 316 transitions. [2021-11-20 06:39:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:39:44,185 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 6.461538461538462) internal successors, (84), 11 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 62 [2021-11-20 06:39:44,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:44,186 INFO L225 Difference]: With dead ends: 294 [2021-11-20 06:39:44,186 INFO L226 Difference]: Without dead ends: 294 [2021-11-20 06:39:44,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=49, Invalid=156, Unknown=5, NotChecked=0, Total=210 [2021-11-20 06:39:44,187 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 56 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:44,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 256 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 102 Unchecked, 0.4s Time] [2021-11-20 06:39:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-20 06:39:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 271. [2021-11-20 06:39:44,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 252 states have (on average 1.0912698412698412) internal successors, (275), 256 states have internal predecessors, (275), 7 states have call successors, (7), 7 states have call predecessors, (7), 9 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-20 06:39:44,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 292 transitions. [2021-11-20 06:39:44,193 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 292 transitions. Word has length 62 [2021-11-20 06:39:44,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:44,194 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 292 transitions. [2021-11-20 06:39:44,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 6.461538461538462) internal successors, (84), 11 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 06:39:44,194 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 292 transitions. [2021-11-20 06:39:44,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:39:44,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:44,195 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:44,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:44,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:44,409 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:39:44,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:44,409 INFO L85 PathProgramCache]: Analyzing trace with hash -407195709, now seen corresponding path program 3 times [2021-11-20 06:39:44,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:44,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086514348] [2021-11-20 06:39:44,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:39:44,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:44,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:44,411 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:44,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-20 06:39:44,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 06:39:44,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:39:44,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 06:39:44,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:39:45,006 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 06:39:45,006 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 29 treesize of output 31 [2021-11-20 06:39:45,012 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:39:45,012 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 28 treesize of output 24 [2021-11-20 06:39:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 06:39:45,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:39:53,376 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_parse_input_c1_~x~0#1.base_145| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_145|))) (let ((.cse0 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (or (not (bvule .cse0 (select (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_145| (_ bv1 32)) |c_~#commands~0.base|))) (not (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse0)))))) (let ((.cse1 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (and (bvule .cse1 (select |c_#length| |c_~#commands~0.base|)) (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse1)))) is different from true [2021-11-20 06:39:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 10 trivial. 2 not checked. [2021-11-20 06:39:59,062 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 06:39:59,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086514348] [2021-11-20 06:39:59,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086514348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:39:59,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:39:59,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-11-20 06:39:59,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262133176] [2021-11-20 06:39:59,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:39:59,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 06:39:59,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 06:39:59,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 06:39:59,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=159, Unknown=5, NotChecked=26, Total=240 [2021-11-20 06:39:59,064 INFO L87 Difference]: Start difference. First operand 271 states and 292 transitions. Second operand has 16 states, 15 states have (on average 6.533333333333333) internal successors, (98), 13 states have internal predecessors, (98), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:39:59,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:39:59,591 INFO L93 Difference]: Finished difference Result 296 states and 317 transitions. [2021-11-20 06:39:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:39:59,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.533333333333333) internal successors, (98), 13 states have internal predecessors, (98), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 62 [2021-11-20 06:39:59,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:39:59,593 INFO L225 Difference]: With dead ends: 296 [2021-11-20 06:39:59,593 INFO L226 Difference]: Without dead ends: 296 [2021-11-20 06:39:59,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=86, Invalid=255, Unknown=5, NotChecked=34, Total=380 [2021-11-20 06:39:59,594 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 164 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 366 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:39:59,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 373 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 63 Invalid, 0 Unknown, 366 Unchecked, 0.2s Time] [2021-11-20 06:39:59,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-20 06:39:59,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 253. [2021-11-20 06:39:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 235 states have (on average 1.0851063829787233) internal successors, (255), 240 states have internal predecessors, (255), 6 states have call successors, (6), 6 states have call predecessors, (6), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-20 06:39:59,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 270 transitions. [2021-11-20 06:39:59,599 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 270 transitions. Word has length 62 [2021-11-20 06:39:59,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:39:59,600 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 270 transitions. [2021-11-20 06:39:59,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.533333333333333) internal successors, (98), 13 states have internal predecessors, (98), 4 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 06:39:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 270 transitions. [2021-11-20 06:39:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 06:39:59,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:39:59,601 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:39:59,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-20 06:39:59,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 06:39:59,801 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 06:39:59,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:39:59,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1893350836, now seen corresponding path program 1 times [2021-11-20 06:39:59,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 06:39:59,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315458755] [2021-11-20 06:39:59,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:39:59,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 06:39:59,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 06:39:59,803 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 06:39:59,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da5ba608-597a-477a-be6d-2aa2d43d1407/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-20 06:39:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:39:59,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 06:39:59,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:40:00,305 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 06:40:00,305 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 12 treesize of output 18 [2021-11-20 06:40:00,667 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:40:00,668 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 21 treesize of output 21 [2021-11-20 06:40:00,821 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 [2021-11-20 06:40:01,021 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 06:40:01,021 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 3 case distinctions, treesize of input 33 treesize of output 38 [2021-11-20 06:40:01,879 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 06:40:01,879 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 32 treesize of output 32 [2021-11-20 06:40:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 13 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:40:02,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:40:03,678 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 16 treesize of output 14 [2021-11-20 06:40:03,699 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:40:03,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-20 06:40:04,469 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 16 treesize of output 14 [2021-11-20 06:40:07,516 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 06:40:07,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35