./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.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_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/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_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/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_108723ba-3a67-43a0-813a-3cf0884fa8ab/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 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:02:05,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:02:05,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:02:05,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:02:05,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:02:05,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:02:05,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:02:05,338 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:02:05,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:02:05,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:02:05,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:02:05,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:02:05,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:02:05,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:02:05,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:02:05,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:02:05,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:02:05,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:02:05,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:02:05,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:02:05,380 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:02:05,381 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:02:05,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:02:05,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:02:05,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:02:05,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:02:05,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:02:05,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:02:05,399 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:02:05,400 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:02:05,401 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:02:05,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:02:05,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:02:05,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:02:05,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:02:05,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:02:05,407 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:02:05,407 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:02:05,408 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:02:05,409 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:02:05,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:02:05,410 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-20 07:02:05,453 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:02:05,453 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:02:05,454 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:02:05,454 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:02:05,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:02:05,455 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:02:05,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:02:05,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:02:05,456 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:02:05,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:02:05,458 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:02:05,458 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:02:05,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:02:05,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:02:05,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:02:05,459 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:02:05,459 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:02:05,459 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:02:05,460 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:02:05,460 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:02:05,460 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:02:05,460 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:02:05,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:02:05,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:02:05,461 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:02:05,461 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:02:05,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:02:05,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:02:05,462 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:02:05,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:02:05,464 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:02:05,464 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_108723ba-3a67-43a0-813a-3cf0884fa8ab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2021-11-20 07:02:05,705 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:02:05,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:02:05,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:02:05,730 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:02:05,731 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:02:05,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-11-20 07:02:05,805 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/data/51da46a4e/38ca5037f4e643dda65ec202a8c8ac1f/FLAG6fe5bb593 [2021-11-20 07:02:06,342 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:02:06,347 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-11-20 07:02:06,374 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/data/51da46a4e/38ca5037f4e643dda65ec202a8c8ac1f/FLAG6fe5bb593 [2021-11-20 07:02:06,636 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/data/51da46a4e/38ca5037f4e643dda65ec202a8c8ac1f [2021-11-20 07:02:06,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:02:06,639 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:02:06,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:02:06,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:02:06,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:02:06,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:02:06" (1/1) ... [2021-11-20 07:02:06,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33dfd495 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:02:06, skipping insertion in model container [2021-11-20 07:02:06,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:02:06" (1/1) ... [2021-11-20 07:02:06,666 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:02:06,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:02:07,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:02:07,140 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:02:07,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:02:07,258 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:02:07,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:02:07 WrapperNode [2021-11-20 07:02:07,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:02:07,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:02:07,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:02:07,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:02:07,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:02:07" (1/1) ... [2021-11-20 07:02:07,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:02:07" (1/1) ... [2021-11-20 07:02:07,317 INFO L137 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2021-11-20 07:02:07,317 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:02:07,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:02:07,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:02:07,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:02:07,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:02:07" (1/1) ... [2021-11-20 07:02:07,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:02:07" (1/1) ... [2021-11-20 07:02:07,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:02:07" (1/1) ... [2021-11-20 07:02:07,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:02:07" (1/1) ... [2021-11-20 07:02:07,341 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:02:07" (1/1) ... [2021-11-20 07:02:07,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:02:07" (1/1) ... [2021-11-20 07:02:07,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:02:07" (1/1) ... [2021-11-20 07:02:07,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:02:07,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:02:07,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:02:07,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:02:07,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:02:07" (1/1) ... [2021-11-20 07:02:07,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:02:07,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:07,385 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:02:07,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:02:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:02:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-11-20 07:02:07,420 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-11-20 07:02:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:02:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:02:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:02:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:02:07,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:02:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:02:07,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:02:07,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:02:07,515 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:02:07,517 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:02:07,754 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:02:07,761 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:02:07,761 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 07:02:07,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:02:07 BoogieIcfgContainer [2021-11-20 07:02:07,778 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:02:07,780 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:02:07,780 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:02:07,784 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:02:07,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:02:06" (1/3) ... [2021-11-20 07:02:07,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2d3e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:02:07, skipping insertion in model container [2021-11-20 07:02:07,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:02:07" (2/3) ... [2021-11-20 07:02:07,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c2d3e6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:02:07, skipping insertion in model container [2021-11-20 07:02:07,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:02:07" (3/3) ... [2021-11-20 07:02:07,787 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2021-11-20 07:02:07,792 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:02:07,792 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-20 07:02:07,836 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:02:07,843 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 07:02:07,844 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-20 07:02:07,860 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 07:02:07,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 07:02:07,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:07,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:02:07,871 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 07:02:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:07,877 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2021-11-20 07:02:07,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:07,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128361163] [2021-11-20 07:02:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:07,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:02:08,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:08,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128361163] [2021-11-20 07:02:08,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128361163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:08,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:02:08,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:02:08,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354309923] [2021-11-20 07:02:08,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:08,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:02:08,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:08,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:02:08,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:02:08,143 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 07:02:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:08,283 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2021-11-20 07:02:08,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:02:08,286 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 07:02:08,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:08,296 INFO L225 Difference]: With dead ends: 120 [2021-11-20 07:02:08,297 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 07:02:08,298 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 07:02:08,302 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 146 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:08,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 106 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:02:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 07:02:08,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2021-11-20 07:02:08,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.65) internal successors, (99), 77 states have internal predecessors, (99), 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 07:02:08,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 117 transitions. [2021-11-20 07:02:08,356 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 117 transitions. Word has length 6 [2021-11-20 07:02:08,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:08,356 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 117 transitions. [2021-11-20 07:02:08,356 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 07:02:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 117 transitions. [2021-11-20 07:02:08,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 07:02:08,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:08,358 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:02:08,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:02:08,359 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 07:02:08,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:08,360 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2021-11-20 07:02:08,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:08,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280122979] [2021-11-20 07:02:08,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:08,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:08,513 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 07:02:08,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:08,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280122979] [2021-11-20 07:02:08,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280122979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:08,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:02:08,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:02:08,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122707489] [2021-11-20 07:02:08,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:08,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:02:08,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:08,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:02:08,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:02:08,518 INFO L87 Difference]: Start difference. First operand 87 states and 117 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 07:02:08,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:08,710 INFO L93 Difference]: Finished difference Result 213 states and 285 transitions. [2021-11-20 07:02:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:02:08,711 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 07:02:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:08,721 INFO L225 Difference]: With dead ends: 213 [2021-11-20 07:02:08,721 INFO L226 Difference]: Without dead ends: 213 [2021-11-20 07:02:08,722 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 07:02:08,730 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 228 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:08,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 145 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:02:08,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-20 07:02:08,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 160. [2021-11-20 07:02:08,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.6666666666666667) internal successors, (210), 143 states have internal predecessors, (210), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-20 07:02:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 246 transitions. [2021-11-20 07:02:08,759 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 246 transitions. Word has length 6 [2021-11-20 07:02:08,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:08,759 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 246 transitions. [2021-11-20 07:02:08,759 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 07:02:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 246 transitions. [2021-11-20 07:02:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 07:02:08,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:08,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:08,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:02:08,760 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 07:02:08,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:08,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2021-11-20 07:02:08,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:08,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447126389] [2021-11-20 07:02:08,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:08,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:09,027 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 07:02:09,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:09,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447126389] [2021-11-20 07:02:09,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447126389] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:09,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:02:09,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:02:09,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012020334] [2021-11-20 07:02:09,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:09,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:02:09,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:09,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:02:09,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:02:09,035 INFO L87 Difference]: Start difference. First operand 160 states and 246 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 07:02:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:09,212 INFO L93 Difference]: Finished difference Result 239 states and 342 transitions. [2021-11-20 07:02:09,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:02:09,212 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 07:02:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:09,218 INFO L225 Difference]: With dead ends: 239 [2021-11-20 07:02:09,218 INFO L226 Difference]: Without dead ends: 239 [2021-11-20 07:02:09,219 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 07:02:09,226 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 133 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:09,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 163 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:02:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-20 07:02:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2021-11-20 07:02:09,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 129 states have (on average 1.6511627906976745) internal successors, (213), 146 states have internal predecessors, (213), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-20 07:02:09,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 249 transitions. [2021-11-20 07:02:09,270 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 249 transitions. Word has length 7 [2021-11-20 07:02:09,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:09,271 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 249 transitions. [2021-11-20 07:02:09,271 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 07:02:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 249 transitions. [2021-11-20 07:02:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 07:02:09,272 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:09,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:09,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 07:02:09,273 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 07:02:09,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:09,281 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2021-11-20 07:02:09,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:09,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792787295] [2021-11-20 07:02:09,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:09,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:09,531 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 07:02:09,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:09,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792787295] [2021-11-20 07:02:09,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792787295] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:09,532 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:02:09,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:02:09,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586333611] [2021-11-20 07:02:09,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:09,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:02:09,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:09,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:02:09,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:02:09,536 INFO L87 Difference]: Start difference. First operand 163 states and 249 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 07:02:09,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:09,677 INFO L93 Difference]: Finished difference Result 215 states and 286 transitions. [2021-11-20 07:02:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:02:09,678 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 07:02:09,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:09,679 INFO L225 Difference]: With dead ends: 215 [2021-11-20 07:02:09,679 INFO L226 Difference]: Without dead ends: 215 [2021-11-20 07:02:09,680 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 07:02:09,681 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 139 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:09,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 190 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:02:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-20 07:02:09,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 163. [2021-11-20 07:02:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 129 states have (on average 1.6356589147286822) internal successors, (211), 146 states have internal predecessors, (211), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-20 07:02:09,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 247 transitions. [2021-11-20 07:02:09,708 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 247 transitions. Word has length 8 [2021-11-20 07:02:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:09,709 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 247 transitions. [2021-11-20 07:02:09,709 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 07:02:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 247 transitions. [2021-11-20 07:02:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 07:02:09,710 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:09,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:09,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 07:02:09,710 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 07:02:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:09,711 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2021-11-20 07:02:09,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:09,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993575204] [2021-11-20 07:02:09,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:09,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:09,759 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 07:02:09,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:09,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993575204] [2021-11-20 07:02:09,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993575204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:09,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:02:09,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:02:09,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639335938] [2021-11-20 07:02:09,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:09,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:02:09,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:09,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:02:09,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:02:09,762 INFO L87 Difference]: Start difference. First operand 163 states and 247 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 07:02:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:09,860 INFO L93 Difference]: Finished difference Result 245 states and 337 transitions. [2021-11-20 07:02:09,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:02:09,861 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 07:02:09,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:09,863 INFO L225 Difference]: With dead ends: 245 [2021-11-20 07:02:09,863 INFO L226 Difference]: Without dead ends: 245 [2021-11-20 07:02:09,863 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 07:02:09,864 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 132 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 187 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 07:02:09,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 187 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:02:09,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-20 07:02:09,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 196. [2021-11-20 07:02:09,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 160 states have (on average 1.60625) internal successors, (257), 178 states have internal predecessors, (257), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-20 07:02:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 293 transitions. [2021-11-20 07:02:09,881 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 293 transitions. Word has length 9 [2021-11-20 07:02:09,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:09,882 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 293 transitions. [2021-11-20 07:02:09,882 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 07:02:09,882 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 293 transitions. [2021-11-20 07:02:09,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 07:02:09,883 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:09,883 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:09,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 07:02:09,883 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 07:02:09,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:09,884 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2021-11-20 07:02:09,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:09,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479665928] [2021-11-20 07:02:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:09,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:09,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:09,938 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 07:02:09,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:09,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479665928] [2021-11-20 07:02:09,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479665928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:09,939 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:02:09,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:02:09,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095322753] [2021-11-20 07:02:09,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:09,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:02:09,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:09,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:02:09,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:02:09,941 INFO L87 Difference]: Start difference. First operand 196 states and 293 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 07:02:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:10,032 INFO L93 Difference]: Finished difference Result 244 states and 316 transitions. [2021-11-20 07:02:10,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:02:10,033 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 07:02:10,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:10,036 INFO L225 Difference]: With dead ends: 244 [2021-11-20 07:02:10,037 INFO L226 Difference]: Without dead ends: 244 [2021-11-20 07:02:10,037 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 07:02:10,038 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 139 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:10,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 211 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:02:10,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-20 07:02:10,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 210. [2021-11-20 07:02:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 173 states have (on average 1.606936416184971) internal successors, (278), 192 states have internal predecessors, (278), 10 states have call successors, (10), 7 states have call predecessors, (10), 9 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-20 07:02:10,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 314 transitions. [2021-11-20 07:02:10,053 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 314 transitions. Word has length 10 [2021-11-20 07:02:10,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:10,054 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 314 transitions. [2021-11-20 07:02:10,054 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 07:02:10,054 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 314 transitions. [2021-11-20 07:02:10,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 07:02:10,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:10,055 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:10,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 07:02:10,055 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 07:02:10,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:10,056 INFO L85 PathProgramCache]: Analyzing trace with hash 12795785, now seen corresponding path program 1 times [2021-11-20 07:02:10,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:10,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701789119] [2021-11-20 07:02:10,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:10,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:10,213 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 07:02:10,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:10,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701789119] [2021-11-20 07:02:10,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701789119] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:10,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294033443] [2021-11-20 07:02:10,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:10,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:10,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:10,219 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:10,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:02:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:10,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:02:10,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:10,622 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 07:02:10,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:10,761 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 07:02:10,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294033443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:10,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:10,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2021-11-20 07:02:10,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36014468] [2021-11-20 07:02:10,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:10,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:02:10,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:10,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:02:10,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:02:10,765 INFO L87 Difference]: Start difference. First operand 210 states and 314 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 07:02:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:11,045 INFO L93 Difference]: Finished difference Result 281 states and 376 transitions. [2021-11-20 07:02:11,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:02:11,046 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 07:02:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:11,049 INFO L225 Difference]: With dead ends: 281 [2021-11-20 07:02:11,049 INFO L226 Difference]: Without dead ends: 281 [2021-11-20 07:02:11,050 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 07:02:11,051 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 329 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:11,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 534 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:02:11,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2021-11-20 07:02:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 215. [2021-11-20 07:02:11,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 177 states have (on average 1.5423728813559323) internal successors, (273), 197 states have internal predecessors, (273), 10 states have call successors, (10), 7 states have call predecessors, (10), 10 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-20 07:02:11,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 310 transitions. [2021-11-20 07:02:11,074 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 310 transitions. Word has length 14 [2021-11-20 07:02:11,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:11,075 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 310 transitions. [2021-11-20 07:02:11,075 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 07:02:11,075 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 310 transitions. [2021-11-20 07:02:11,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 07:02:11,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:11,077 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:11,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:11,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 07:02:11,293 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 07:02:11,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:11,294 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2021-11-20 07:02:11,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:11,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397728042] [2021-11-20 07:02:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:11,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:11,432 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 07:02:11,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:11,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397728042] [2021-11-20 07:02:11,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397728042] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:11,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816287664] [2021-11-20 07:02:11,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:11,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:11,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:11,436 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:11,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:02:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:11,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:02:11,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:11,675 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 07:02:11,684 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 07:02:11,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:11,757 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 07:02:11,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816287664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:11,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:11,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-20 07:02:11,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026830811] [2021-11-20 07:02:11,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:11,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:02:11,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:11,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:02:11,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:02:11,760 INFO L87 Difference]: Start difference. First operand 215 states and 310 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 07:02:12,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:12,056 INFO L93 Difference]: Finished difference Result 312 states and 433 transitions. [2021-11-20 07:02:12,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:02:12,057 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 07:02:12,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:12,059 INFO L225 Difference]: With dead ends: 312 [2021-11-20 07:02:12,059 INFO L226 Difference]: Without dead ends: 312 [2021-11-20 07:02:12,060 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 07:02:12,060 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 236 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:12,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 366 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:02:12,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-20 07:02:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 227. [2021-11-20 07:02:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 187 states have (on average 1.5294117647058822) internal successors, (286), 209 states have internal predecessors, (286), 10 states have call successors, (10), 7 states have call predecessors, (10), 12 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2021-11-20 07:02:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 327 transitions. [2021-11-20 07:02:12,074 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 327 transitions. Word has length 15 [2021-11-20 07:02:12,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:12,075 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 327 transitions. [2021-11-20 07:02:12,075 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 07:02:12,075 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 327 transitions. [2021-11-20 07:02:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 07:02:12,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:12,076 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:12,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:12,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:12,295 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 07:02:12,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:12,296 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2021-11-20 07:02:12,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:12,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457939154] [2021-11-20 07:02:12,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:12,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:12,480 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 07:02:12,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:12,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457939154] [2021-11-20 07:02:12,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457939154] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:12,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722713147] [2021-11-20 07:02:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:12,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:12,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:12,482 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:12,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:02:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:12,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 07:02:12,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:12,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-20 07:02:12,808 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 07:02:12,831 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 07:02:12,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:12,977 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 07:02:12,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722713147] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:12,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:12,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2021-11-20 07:02:12,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898011] [2021-11-20 07:02:12,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:12,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:02:12,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:12,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:02:12,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:02:12,981 INFO L87 Difference]: Start difference. First operand 227 states and 327 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 07:02:13,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:13,715 INFO L93 Difference]: Finished difference Result 491 states and 639 transitions. [2021-11-20 07:02:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:02:13,715 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 07:02:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:13,719 INFO L225 Difference]: With dead ends: 491 [2021-11-20 07:02:13,719 INFO L226 Difference]: Without dead ends: 491 [2021-11-20 07:02:13,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:02:13,720 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 593 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:13,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 883 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:02:13,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-11-20 07:02:13,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 298. [2021-11-20 07:02:13,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 254 states have (on average 1.5511811023622046) internal successors, (394), 278 states have internal predecessors, (394), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-20 07:02:13,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 437 transitions. [2021-11-20 07:02:13,736 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 437 transitions. Word has length 16 [2021-11-20 07:02:13,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:13,737 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 437 transitions. [2021-11-20 07:02:13,737 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 07:02:13,737 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 437 transitions. [2021-11-20 07:02:13,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:02:13,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:13,738 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 07:02:13,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:13,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:13,956 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 07:02:13,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:13,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199734, now seen corresponding path program 1 times [2021-11-20 07:02:13,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:13,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115747414] [2021-11-20 07:02:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:13,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:13,986 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 07:02:13,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:13,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115747414] [2021-11-20 07:02:13,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115747414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:13,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:02:13,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-20 07:02:13,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447677380] [2021-11-20 07:02:13,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:13,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:02:13,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:13,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:02:13,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:02:13,988 INFO L87 Difference]: Start difference. First operand 298 states and 437 transitions. Second operand has 3 states, 2 states have (on average 8.5) 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 07:02:14,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:14,007 INFO L93 Difference]: Finished difference Result 440 states and 649 transitions. [2021-11-20 07:02:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:02:14,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) 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 07:02:14,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:14,011 INFO L225 Difference]: With dead ends: 440 [2021-11-20 07:02:14,011 INFO L226 Difference]: Without dead ends: 440 [2021-11-20 07:02:14,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:02:14,012 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 47 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:14,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 108 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:02:14,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-11-20 07:02:14,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 423. [2021-11-20 07:02:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 367 states have (on average 1.555858310626703) internal successors, (571), 396 states have internal predecessors, (571), 15 states have call successors, (15), 11 states have call predecessors, (15), 23 states have return successors, (55), 15 states have call predecessors, (55), 15 states have call successors, (55) [2021-11-20 07:02:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 641 transitions. [2021-11-20 07:02:14,045 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 641 transitions. Word has length 18 [2021-11-20 07:02:14,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:14,047 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 641 transitions. [2021-11-20 07:02:14,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) 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 07:02:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 641 transitions. [2021-11-20 07:02:14,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:02:14,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:14,048 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 07:02:14,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 07:02:14,049 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:02:14,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:14,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199478, now seen corresponding path program 1 times [2021-11-20 07:02:14,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:14,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750866806] [2021-11-20 07:02:14,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:14,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:14,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:14,097 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 07:02:14,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:14,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750866806] [2021-11-20 07:02:14,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750866806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:14,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:02:14,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 07:02:14,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590563180] [2021-11-20 07:02:14,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:14,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:02:14,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:14,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:02:14,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:02:14,100 INFO L87 Difference]: Start difference. First operand 423 states and 641 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 07:02:14,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:14,114 INFO L93 Difference]: Finished difference Result 387 states and 577 transitions. [2021-11-20 07:02:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:02:14,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 07:02:14,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:14,118 INFO L225 Difference]: With dead ends: 387 [2021-11-20 07:02:14,118 INFO L226 Difference]: Without dead ends: 387 [2021-11-20 07:02:14,118 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 07:02:14,119 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 10 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 102 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 07:02:14,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 102 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:02:14,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-20 07:02:14,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2021-11-20 07:02:14,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 336 states have (on average 1.505952380952381) internal successors, (506), 360 states have internal predecessors, (506), 15 states have call successors, (15), 11 states have call predecessors, (15), 24 states have return successors, (56), 15 states have call predecessors, (56), 15 states have call successors, (56) [2021-11-20 07:02:14,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 577 transitions. [2021-11-20 07:02:14,138 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 577 transitions. Word has length 18 [2021-11-20 07:02:14,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:14,139 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 577 transitions. [2021-11-20 07:02:14,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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 07:02:14,139 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 577 transitions. [2021-11-20 07:02:14,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 07:02:14,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:14,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:14,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-20 07:02:14,142 INFO L402 AbstractCegarLoop]: === Iteration 12 === 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 07:02:14,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:14,142 INFO L85 PathProgramCache]: Analyzing trace with hash 772383166, now seen corresponding path program 1 times [2021-11-20 07:02:14,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:14,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070193285] [2021-11-20 07:02:14,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:14,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:14,197 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 07:02:14,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:14,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070193285] [2021-11-20 07:02:14,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070193285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:14,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:02:14,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-20 07:02:14,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285653623] [2021-11-20 07:02:14,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:14,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:02:14,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:14,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:02:14,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:02:14,199 INFO L87 Difference]: Start difference. First operand 387 states and 577 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 07:02:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:14,229 INFO L93 Difference]: Finished difference Result 452 states and 656 transitions. [2021-11-20 07:02:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:02:14,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 19 [2021-11-20 07:02:14,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:14,235 INFO L225 Difference]: With dead ends: 452 [2021-11-20 07:02:14,235 INFO L226 Difference]: Without dead ends: 452 [2021-11-20 07:02:14,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:02:14,236 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 30 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:14,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 87 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:02:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-20 07:02:14,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 431. [2021-11-20 07:02:14,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 378 states have (on average 1.5052910052910053) internal successors, (569), 402 states have internal predecessors, (569), 16 states have call successors, (16), 12 states have call predecessors, (16), 25 states have return successors, (57), 16 states have call predecessors, (57), 16 states have call successors, (57) [2021-11-20 07:02:14,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 642 transitions. [2021-11-20 07:02:14,256 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 642 transitions. Word has length 19 [2021-11-20 07:02:14,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:14,257 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 642 transitions. [2021-11-20 07:02:14,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 07:02:14,257 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 642 transitions. [2021-11-20 07:02:14,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:02:14,263 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:14,264 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 07:02:14,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-20 07:02:14,264 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 07:02:14,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:14,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1243788554, now seen corresponding path program 1 times [2021-11-20 07:02:14,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:14,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470612821] [2021-11-20 07:02:14,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:14,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:14,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:14,325 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 07:02:14,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:14,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470612821] [2021-11-20 07:02:14,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470612821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:14,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:02:14,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:02:14,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319530069] [2021-11-20 07:02:14,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:14,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:02:14,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:14,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:02:14,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:02:14,332 INFO L87 Difference]: Start difference. First operand 431 states and 642 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 07:02:14,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:14,382 INFO L93 Difference]: Finished difference Result 300 states and 427 transitions. [2021-11-20 07:02:14,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:02:14,383 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 07:02:14,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:14,386 INFO L225 Difference]: With dead ends: 300 [2021-11-20 07:02:14,386 INFO L226 Difference]: Without dead ends: 300 [2021-11-20 07:02:14,386 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 07:02:14,387 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 39 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:14,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 60 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:02:14,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-20 07:02:14,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 295. [2021-11-20 07:02:14,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 257 states have (on average 1.4747081712062258) internal successors, (379), 275 states have internal predecessors, (379), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-20 07:02:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 422 transitions. [2021-11-20 07:02:14,401 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 422 transitions. Word has length 25 [2021-11-20 07:02:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:14,402 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 422 transitions. [2021-11-20 07:02:14,402 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 07:02:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 422 transitions. [2021-11-20 07:02:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 07:02:14,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:14,404 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 07:02:14,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-20 07:02:14,405 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:02:14,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:14,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1518533648, now seen corresponding path program 1 times [2021-11-20 07:02:14,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:14,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678075796] [2021-11-20 07:02:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:14,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:14,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:14,522 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 07:02:14,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:14,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678075796] [2021-11-20 07:02:14,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678075796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:14,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:02:14,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 07:02:14,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475231180] [2021-11-20 07:02:14,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:14,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:02:14,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:14,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:02:14,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:02:14,525 INFO L87 Difference]: Start difference. First operand 295 states and 422 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 4 states have internal predecessors, (24), 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 07:02:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:14,669 INFO L93 Difference]: Finished difference Result 314 states and 436 transitions. [2021-11-20 07:02:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:02:14,670 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 4 states have internal predecessors, (24), 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 27 [2021-11-20 07:02:14,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:14,672 INFO L225 Difference]: With dead ends: 314 [2021-11-20 07:02:14,673 INFO L226 Difference]: Without dead ends: 314 [2021-11-20 07:02:14,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:02:14,674 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 101 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:14,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 111 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:02:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-20 07:02:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 295. [2021-11-20 07:02:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 257 states have (on average 1.4630350194552528) internal successors, (376), 275 states have internal predecessors, (376), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-20 07:02:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 419 transitions. [2021-11-20 07:02:14,686 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 419 transitions. Word has length 27 [2021-11-20 07:02:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:14,686 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 419 transitions. [2021-11-20 07:02:14,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 4 states have internal predecessors, (24), 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 07:02:14,686 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 419 transitions. [2021-11-20 07:02:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 07:02:14,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:14,689 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 07:02:14,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-20 07:02:14,689 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:02:14,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:14,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1125506638, now seen corresponding path program 1 times [2021-11-20 07:02:14,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:14,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323047760] [2021-11-20 07:02:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:14,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:14,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:14,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:14,908 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 07:02:14,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:14,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323047760] [2021-11-20 07:02:14,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323047760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:14,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374872639] [2021-11-20 07:02:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:14,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:14,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:14,912 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:14,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:02:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:14,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:02:14,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:15,407 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:02:15,408 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 07:02:15,413 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:02:15,414 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 07:02:15,516 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 07:02:15,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:15,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374872639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:15,678 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:02:15,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2021-11-20 07:02:15,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732816335] [2021-11-20 07:02:15,679 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:15,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:02:15,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:15,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:02:15,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:02:15,680 INFO L87 Difference]: Start difference. First operand 295 states and 419 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 07:02:16,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:16,537 INFO L93 Difference]: Finished difference Result 484 states and 633 transitions. [2021-11-20 07:02:16,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 07:02:16,538 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 07:02:16,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:16,541 INFO L225 Difference]: With dead ends: 484 [2021-11-20 07:02:16,542 INFO L226 Difference]: Without dead ends: 484 [2021-11-20 07:02:16,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 07:02:16,543 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 366 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:16,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 410 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 348 Invalid, 0 Unknown, 270 Unchecked, 0.3s Time] [2021-11-20 07:02:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-20 07:02:16,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 418. [2021-11-20 07:02:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 373 states have (on average 1.4450402144772119) internal successors, (539), 394 states have internal predecessors, (539), 12 states have call successors, (12), 11 states have call predecessors, (12), 21 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2021-11-20 07:02:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 581 transitions. [2021-11-20 07:02:16,559 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 581 transitions. Word has length 27 [2021-11-20 07:02:16,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:16,560 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 581 transitions. [2021-11-20 07:02:16,560 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 07:02:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 581 transitions. [2021-11-20 07:02:16,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 07:02:16,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:16,561 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, 1] [2021-11-20 07:02:16,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:16,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 07:02:16,788 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:02:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:16,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1031478775, now seen corresponding path program 1 times [2021-11-20 07:02:16,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:16,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312859532] [2021-11-20 07:02:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:16,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:16,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:16,888 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 07:02:16,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:16,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312859532] [2021-11-20 07:02:16,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312859532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:16,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411955790] [2021-11-20 07:02:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:16,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:16,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:16,890 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:16,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:02:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:16,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:02:16,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:17,174 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 07:02:17,175 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:02:17,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411955790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:17,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:02:17,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2021-11-20 07:02:17,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363583091] [2021-11-20 07:02:17,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:17,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:02:17,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:17,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:02:17,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:02:17,177 INFO L87 Difference]: Start difference. First operand 418 states and 581 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 07:02:17,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:17,291 INFO L93 Difference]: Finished difference Result 511 states and 677 transitions. [2021-11-20 07:02:17,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:02:17,292 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 07:02:17,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:17,294 INFO L225 Difference]: With dead ends: 511 [2021-11-20 07:02:17,294 INFO L226 Difference]: Without dead ends: 511 [2021-11-20 07:02:17,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:02:17,295 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 102 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 143 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 07:02:17,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 143 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:02:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-11-20 07:02:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 442. [2021-11-20 07:02:17,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 397 states have (on average 1.420654911838791) internal successors, (564), 418 states have internal predecessors, (564), 12 states have call successors, (12), 11 states have call predecessors, (12), 21 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2021-11-20 07:02:17,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 606 transitions. [2021-11-20 07:02:17,309 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 606 transitions. Word has length 28 [2021-11-20 07:02:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:17,309 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 606 transitions. [2021-11-20 07:02:17,310 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 07:02:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 606 transitions. [2021-11-20 07:02:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 07:02:17,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:17,310 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 07:02:17,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:17,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 07:02:17,526 INFO L402 AbstractCegarLoop]: === Iteration 17 === 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 07:02:17,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:17,527 INFO L85 PathProgramCache]: Analyzing trace with hash -719880979, now seen corresponding path program 1 times [2021-11-20 07:02:17,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:17,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535754508] [2021-11-20 07:02:17,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:17,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:17,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:17,954 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 07:02:17,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:17,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535754508] [2021-11-20 07:02:17,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535754508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:17,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676868629] [2021-11-20 07:02:17,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:17,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:17,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:17,960 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:17,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:02:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:18,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 07:02:18,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:18,486 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:02:18,486 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 07:02:18,492 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:02:18,492 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 07:02:18,630 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 07:02:18,633 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 07:02:18,671 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 07:02:18,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:18,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676868629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:18,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:02:18,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2021-11-20 07:02:18,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557282519] [2021-11-20 07:02:18,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:18,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:02:18,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:18,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:02:18,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:02:18,836 INFO L87 Difference]: Start difference. First operand 442 states and 606 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 07:02:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:20,578 INFO L93 Difference]: Finished difference Result 605 states and 725 transitions. [2021-11-20 07:02:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 07:02:20,579 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 07:02:20,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:20,583 INFO L225 Difference]: With dead ends: 605 [2021-11-20 07:02:20,583 INFO L226 Difference]: Without dead ends: 605 [2021-11-20 07:02:20,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=479, Invalid=1971, Unknown=0, NotChecked=0, Total=2450 [2021-11-20 07:02:20,585 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 585 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:20,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [585 Valid, 358 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 641 Invalid, 0 Unknown, 235 Unchecked, 0.6s Time] [2021-11-20 07:02:20,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-11-20 07:02:20,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 458. [2021-11-20 07:02:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 414 states have (on average 1.4106280193236715) internal successors, (584), 434 states have internal predecessors, (584), 12 states have call successors, (12), 11 states have call predecessors, (12), 20 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2021-11-20 07:02:20,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 622 transitions. [2021-11-20 07:02:20,603 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 622 transitions. Word has length 29 [2021-11-20 07:02:20,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:20,603 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 622 transitions. [2021-11-20 07:02:20,604 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 07:02:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 622 transitions. [2021-11-20 07:02:20,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 07:02:20,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:20,605 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 07:02:20,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:20,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-20 07:02:20,828 INFO L402 AbstractCegarLoop]: === Iteration 18 === 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 07:02:20,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash -253201523, now seen corresponding path program 1 times [2021-11-20 07:02:20,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:20,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115332335] [2021-11-20 07:02:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:20,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:20,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:20,892 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 07:02:20,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:20,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115332335] [2021-11-20 07:02:20,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115332335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:20,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013133438] [2021-11-20 07:02:20,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:20,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:20,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:20,895 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:20,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:02:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:20,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:02:20,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:21,063 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 07:02:21,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:21,235 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 07:02:21,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013133438] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:21,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:21,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-11-20 07:02:21,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874375738] [2021-11-20 07:02:21,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:21,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:02:21,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:21,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:02:21,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:02:21,237 INFO L87 Difference]: Start difference. First operand 458 states and 622 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 07:02:21,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:21,523 INFO L93 Difference]: Finished difference Result 545 states and 686 transitions. [2021-11-20 07:02:21,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:02:21,524 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 07:02:21,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:21,527 INFO L225 Difference]: With dead ends: 545 [2021-11-20 07:02:21,527 INFO L226 Difference]: Without dead ends: 545 [2021-11-20 07:02:21,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 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 07:02:21,528 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 253 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:21,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 147 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:02:21,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-11-20 07:02:21,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 493. [2021-11-20 07:02:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 448 states have (on average 1.375) internal successors, (616), 468 states have internal predecessors, (616), 12 states have call successors, (12), 12 states have call predecessors, (12), 21 states have return successors, (25), 12 states have call predecessors, (25), 12 states have call successors, (25) [2021-11-20 07:02:21,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 653 transitions. [2021-11-20 07:02:21,544 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 653 transitions. Word has length 30 [2021-11-20 07:02:21,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:21,544 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 653 transitions. [2021-11-20 07:02:21,545 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 07:02:21,545 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 653 transitions. [2021-11-20 07:02:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 07:02:21,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:21,546 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 07:02:21,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:21,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 07:02:21,760 INFO L402 AbstractCegarLoop]: === Iteration 19 === 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 07:02:21,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:21,760 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2021-11-20 07:02:21,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:21,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12468404] [2021-11-20 07:02:21,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:21,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:21,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:21,829 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 07:02:21,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:21,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12468404] [2021-11-20 07:02:21,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12468404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:21,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402526066] [2021-11-20 07:02:21,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:21,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:21,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:21,836 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:21,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:02:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:21,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:02:21,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:22,041 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 07:02:22,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:22,252 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 07:02:22,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402526066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:22,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:22,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2021-11-20 07:02:22,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564404754] [2021-11-20 07:02:22,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:22,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:02:22,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:22,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:02:22,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:02:22,255 INFO L87 Difference]: Start difference. First operand 493 states and 653 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 07:02:22,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:22,723 INFO L93 Difference]: Finished difference Result 543 states and 672 transitions. [2021-11-20 07:02:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-20 07:02:22,724 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 07:02:22,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:22,726 INFO L225 Difference]: With dead ends: 543 [2021-11-20 07:02:22,726 INFO L226 Difference]: Without dead ends: 543 [2021-11-20 07:02:22,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2021-11-20 07:02:22,728 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 437 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:22,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 245 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:02:22,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2021-11-20 07:02:22,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 498. [2021-11-20 07:02:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 453 states have (on average 1.3421633554083885) internal successors, (608), 473 states have internal predecessors, (608), 12 states have call successors, (12), 12 states have call predecessors, (12), 21 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-11-20 07:02:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 644 transitions. [2021-11-20 07:02:22,745 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 644 transitions. Word has length 31 [2021-11-20 07:02:22,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:22,745 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 644 transitions. [2021-11-20 07:02:22,746 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 07:02:22,746 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 644 transitions. [2021-11-20 07:02:22,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 07:02:22,747 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:22,747 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 07:02:22,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:22,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:22,968 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:02:22,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:22,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1377524307, now seen corresponding path program 1 times [2021-11-20 07:02:22,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:22,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986655961] [2021-11-20 07:02:22,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:22,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:23,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:23,141 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 07:02:23,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:23,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986655961] [2021-11-20 07:02:23,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986655961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:23,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541463195] [2021-11-20 07:02:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:23,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:23,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:23,144 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:23,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:02:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:23,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:02:23,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:23,558 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:02:23,558 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 07:02:23,574 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:02:23,574 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 07:02:23,820 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 07:02:23,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:24,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541463195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:24,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:02:24,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2021-11-20 07:02:24,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170033636] [2021-11-20 07:02:24,046 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:24,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:02:24,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:24,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:02:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:02:24,048 INFO L87 Difference]: Start difference. First operand 498 states and 644 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 07:02:24,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:24,864 INFO L93 Difference]: Finished difference Result 548 states and 680 transitions. [2021-11-20 07:02:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:02:24,864 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 07:02:24,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:24,868 INFO L225 Difference]: With dead ends: 548 [2021-11-20 07:02:24,868 INFO L226 Difference]: Without dead ends: 548 [2021-11-20 07:02:24,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 07:02:24,869 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 258 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:24,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 332 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 346 Invalid, 0 Unknown, 158 Unchecked, 0.3s Time] [2021-11-20 07:02:24,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-20 07:02:24,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 498. [2021-11-20 07:02:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 453 states have (on average 1.3399558498896247) internal successors, (607), 473 states have internal predecessors, (607), 12 states have call successors, (12), 12 states have call predecessors, (12), 21 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-11-20 07:02:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 643 transitions. [2021-11-20 07:02:24,890 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 643 transitions. Word has length 33 [2021-11-20 07:02:24,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:24,891 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 643 transitions. [2021-11-20 07:02:24,891 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 07:02:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 643 transitions. [2021-11-20 07:02:24,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 07:02:24,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:24,892 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 07:02:24,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:25,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:25,108 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:02:25,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:25,108 INFO L85 PathProgramCache]: Analyzing trace with hash 952776277, now seen corresponding path program 1 times [2021-11-20 07:02:25,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:25,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333361420] [2021-11-20 07:02:25,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:25,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:25,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:25,317 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 07:02:25,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:25,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333361420] [2021-11-20 07:02:25,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333361420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:25,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833242518] [2021-11-20 07:02:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:25,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:25,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:25,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:25,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:02:25,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:25,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 07:02:25,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:25,771 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:02:25,771 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 07:02:25,778 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:02:25,779 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 07:02:26,035 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 07:02:26,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:26,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833242518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:26,260 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:02:26,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-11-20 07:02:26,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080471228] [2021-11-20 07:02:26,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:26,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:02:26,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:26,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:02:26,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:02:26,262 INFO L87 Difference]: Start difference. First operand 498 states and 643 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 07:02:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:27,293 INFO L93 Difference]: Finished difference Result 550 states and 682 transitions. [2021-11-20 07:02:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 07:02:27,294 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 07:02:27,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:27,297 INFO L225 Difference]: With dead ends: 550 [2021-11-20 07:02:27,297 INFO L226 Difference]: Without dead ends: 550 [2021-11-20 07:02:27,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=1206, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 07:02:27,300 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 350 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:27,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 420 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 486 Invalid, 0 Unknown, 261 Unchecked, 0.4s Time] [2021-11-20 07:02:27,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-11-20 07:02:27,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 501. [2021-11-20 07:02:27,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 456 states have (on average 1.337719298245614) internal successors, (610), 476 states have internal predecessors, (610), 12 states have call successors, (12), 12 states have call predecessors, (12), 21 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-11-20 07:02:27,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 646 transitions. [2021-11-20 07:02:27,319 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 646 transitions. Word has length 35 [2021-11-20 07:02:27,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:27,319 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 646 transitions. [2021-11-20 07:02:27,320 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 07:02:27,320 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 646 transitions. [2021-11-20 07:02:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 07:02:27,321 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:27,321 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 07:02:27,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:27,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 07:02:27,548 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr9REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:02:27,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:27,548 INFO L85 PathProgramCache]: Analyzing trace with hash 950930836, now seen corresponding path program 1 times [2021-11-20 07:02:27,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:27,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108280027] [2021-11-20 07:02:27,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:27,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:27,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:27,637 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 07:02:27,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:27,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108280027] [2021-11-20 07:02:27,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108280027] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:27,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537280154] [2021-11-20 07:02:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:27,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:27,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:27,639 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:27,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:02:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:27,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:02:27,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:27,802 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 07:02:27,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:02:27,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537280154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:27,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:02:27,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2021-11-20 07:02:27,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088222209] [2021-11-20 07:02:27,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:27,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:02:27,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:27,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:02:27,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:02:27,805 INFO L87 Difference]: Start difference. First operand 501 states and 646 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 07:02:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:27,859 INFO L93 Difference]: Finished difference Result 536 states and 673 transitions. [2021-11-20 07:02:27,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:02:27,860 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 07:02:27,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:27,863 INFO L225 Difference]: With dead ends: 536 [2021-11-20 07:02:27,863 INFO L226 Difference]: Without dead ends: 536 [2021-11-20 07:02:27,864 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 07:02:27,865 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 32 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:27,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 74 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:02:27,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-20 07:02:27,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 500. [2021-11-20 07:02:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 500 states, 456 states have (on average 1.3179824561403508) internal successors, (601), 475 states have internal predecessors, (601), 12 states have call successors, (12), 12 states have call predecessors, (12), 21 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2021-11-20 07:02:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 637 transitions. [2021-11-20 07:02:27,883 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 637 transitions. Word has length 35 [2021-11-20 07:02:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:27,884 INFO L470 AbstractCegarLoop]: Abstraction has 500 states and 637 transitions. [2021-11-20 07:02:27,884 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 07:02:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 637 transitions. [2021-11-20 07:02:27,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 07:02:27,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:27,885 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, 1] [2021-11-20 07:02:27,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:28,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:28,108 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:02:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:28,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1567291088, now seen corresponding path program 1 times [2021-11-20 07:02:28,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:28,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388684230] [2021-11-20 07:02:28,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:28,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:28,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:02:28,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:28,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388684230] [2021-11-20 07:02:28,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388684230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:28,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823368237] [2021-11-20 07:02:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:28,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:28,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:28,251 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:28,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:02:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:28,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:02:28,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:28,584 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:02:28,585 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 07:02:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:02:28,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:28,758 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 17 treesize of output 13 [2021-11-20 07:02:28,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 07:02:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:02:28,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823368237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:28,995 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:28,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2021-11-20 07:02:28,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266554260] [2021-11-20 07:02:28,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:28,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:02:28,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:28,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:02:28,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:02:28,997 INFO L87 Difference]: Start difference. First operand 500 states and 637 transitions. Second operand has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:02:29,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:29,441 INFO L93 Difference]: Finished difference Result 548 states and 669 transitions. [2021-11-20 07:02:29,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:02:29,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 36 [2021-11-20 07:02:29,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:29,445 INFO L225 Difference]: With dead ends: 548 [2021-11-20 07:02:29,445 INFO L226 Difference]: Without dead ends: 548 [2021-11-20 07:02:29,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2021-11-20 07:02:29,446 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 458 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:29,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 120 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:02:29,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-11-20 07:02:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 454. [2021-11-20 07:02:29,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 415 states have (on average 1.3228915662650602) internal successors, (549), 433 states have internal predecessors, (549), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (19), 10 states have call predecessors, (19), 10 states have call successors, (19) [2021-11-20 07:02:29,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 578 transitions. [2021-11-20 07:02:29,461 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 578 transitions. Word has length 36 [2021-11-20 07:02:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:29,462 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 578 transitions. [2021-11-20 07:02:29,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 5.466666666666667) internal successors, (82), 14 states have internal predecessors, (82), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:02:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 578 transitions. [2021-11-20 07:02:29,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:02:29,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:29,463 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:29,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:29,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:29,688 INFO L402 AbstractCegarLoop]: === Iteration 24 === 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 07:02:29,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:29,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1341383453, now seen corresponding path program 1 times [2021-11-20 07:02:29,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:29,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792277878] [2021-11-20 07:02:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:29,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:29,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:02:29,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:29,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792277878] [2021-11-20 07:02:29,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792277878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:29,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372300405] [2021-11-20 07:02:29,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:29,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:29,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:29,968 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:29,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:02:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:30,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 07:02:30,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:30,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-20 07:02:30,510 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 07:02:30,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:02:30,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:02:30,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372300405] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:30,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:30,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2021-11-20 07:02:30,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600188640] [2021-11-20 07:02:30,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:30,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 07:02:30,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:30,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 07:02:30,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:02:30,888 INFO L87 Difference]: Start difference. First operand 454 states and 578 transitions. Second operand has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 18 states have internal predecessors, (90), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:02:32,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:32,572 INFO L93 Difference]: Finished difference Result 353 states and 416 transitions. [2021-11-20 07:02:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 07:02:32,573 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 18 states have internal predecessors, (90), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2021-11-20 07:02:32,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:32,575 INFO L225 Difference]: With dead ends: 353 [2021-11-20 07:02:32,575 INFO L226 Difference]: Without dead ends: 353 [2021-11-20 07:02:32,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=606, Invalid=2474, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 07:02:32,577 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 529 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:32,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 340 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:02:32,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-20 07:02:32,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 295. [2021-11-20 07:02:32,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 265 states have (on average 1.3283018867924528) internal successors, (352), 280 states have internal predecessors, (352), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:02:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 372 transitions. [2021-11-20 07:02:32,588 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 372 transitions. Word has length 37 [2021-11-20 07:02:32,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:32,588 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 372 transitions. [2021-11-20 07:02:32,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.090909090909091) internal successors, (90), 18 states have internal predecessors, (90), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-20 07:02:32,588 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 372 transitions. [2021-11-20 07:02:32,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:02:32,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:32,589 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 07:02:32,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:32,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 07:02:32,809 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 07:02:32,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:32,810 INFO L85 PathProgramCache]: Analyzing trace with hash -981900328, now seen corresponding path program 1 times [2021-11-20 07:02:32,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:32,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070722206] [2021-11-20 07:02:32,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:32,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:32,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:33,021 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 07:02:33,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:33,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070722206] [2021-11-20 07:02:33,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070722206] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:33,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967831849] [2021-11-20 07:02:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:33,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:33,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:33,024 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:33,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 07:02:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:33,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 07:02:33,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:33,528 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:02:33,528 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 07:02:33,535 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:02:33,535 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 07:02:33,809 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 07:02:33,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:34,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967831849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:34,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:02:34,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-11-20 07:02:34,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517367662] [2021-11-20 07:02:34,043 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:34,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:02:34,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:34,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:02:34,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:02:34,044 INFO L87 Difference]: Start difference. First operand 295 states and 372 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 07:02:34,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:34,725 INFO L93 Difference]: Finished difference Result 318 states and 384 transitions. [2021-11-20 07:02:34,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:02:34,736 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 07:02:34,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:34,738 INFO L225 Difference]: With dead ends: 318 [2021-11-20 07:02:34,738 INFO L226 Difference]: Without dead ends: 318 [2021-11-20 07:02:34,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-11-20 07:02:34,739 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 217 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:34,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 490 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 420 Invalid, 0 Unknown, 252 Unchecked, 0.2s Time] [2021-11-20 07:02:34,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-11-20 07:02:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 292. [2021-11-20 07:02:34,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 262 states have (on average 1.3282442748091603) internal successors, (348), 277 states have internal predecessors, (348), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:02:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 368 transitions. [2021-11-20 07:02:34,748 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 368 transitions. Word has length 37 [2021-11-20 07:02:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:34,748 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 368 transitions. [2021-11-20 07:02:34,749 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 07:02:34,749 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 368 transitions. [2021-11-20 07:02:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:02:34,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:34,749 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 07:02:34,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:34,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-20 07:02:34,968 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 07:02:34,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash -948350694, now seen corresponding path program 1 times [2021-11-20 07:02:34,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:34,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015476659] [2021-11-20 07:02:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:34,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:35,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:35,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:35,131 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 07:02:35,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:35,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015476659] [2021-11-20 07:02:35,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015476659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:35,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195515156] [2021-11-20 07:02:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:35,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:35,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:35,140 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:35,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 07:02:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:35,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:02:35,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:35,533 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:02:35,534 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 07:02:35,540 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:02:35,540 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 07:02:35,880 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 07:02:35,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:36,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195515156] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:36,199 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:02:36,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2021-11-20 07:02:36,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200220669] [2021-11-20 07:02:36,200 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:36,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:02:36,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:36,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:02:36,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:02:36,201 INFO L87 Difference]: Start difference. First operand 292 states and 368 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 07:02:37,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:37,057 INFO L93 Difference]: Finished difference Result 338 states and 407 transitions. [2021-11-20 07:02:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:02:37,058 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 07:02:37,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:37,060 INFO L225 Difference]: With dead ends: 338 [2021-11-20 07:02:37,060 INFO L226 Difference]: Without dead ends: 338 [2021-11-20 07:02:37,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=265, Invalid=1217, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 07:02:37,061 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 211 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:37,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 391 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 351 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2021-11-20 07:02:37,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-11-20 07:02:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 306. [2021-11-20 07:02:37,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 276 states have (on average 1.326086956521739) internal successors, (366), 291 states have internal predecessors, (366), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:02:37,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 386 transitions. [2021-11-20 07:02:37,076 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 386 transitions. Word has length 41 [2021-11-20 07:02:37,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:37,076 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 386 transitions. [2021-11-20 07:02:37,076 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 07:02:37,076 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 386 transitions. [2021-11-20 07:02:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:02:37,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:37,077 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 07:02:37,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:37,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-20 07:02:37,308 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 07:02:37,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:37,308 INFO L85 PathProgramCache]: Analyzing trace with hash -830105764, now seen corresponding path program 2 times [2021-11-20 07:02:37,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:37,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228862916] [2021-11-20 07:02:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:37,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:37,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:37,367 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 07:02:37,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:37,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228862916] [2021-11-20 07:02:37,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228862916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:37,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942718111] [2021-11-20 07:02:37,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:02:37,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:37,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:37,369 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:37,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 07:02:37,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:02:37,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:02:37,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:02:37,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:37,525 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 07:02:37,525 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:02:37,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942718111] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:37,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:02:37,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-11-20 07:02:37,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871188980] [2021-11-20 07:02:37,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:37,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:02:37,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:37,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:02:37,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:02:37,527 INFO L87 Difference]: Start difference. First operand 306 states and 386 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 07:02:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:37,551 INFO L93 Difference]: Finished difference Result 327 states and 390 transitions. [2021-11-20 07:02:37,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:02:37,552 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 07:02:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:37,554 INFO L225 Difference]: With dead ends: 327 [2021-11-20 07:02:37,554 INFO L226 Difference]: Without dead ends: 327 [2021-11-20 07:02:37,554 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 07:02:37,555 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 53 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:37,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:02:37,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-20 07:02:37,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 292. [2021-11-20 07:02:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 262 states have (on average 1.2786259541984732) internal successors, (335), 277 states have internal predecessors, (335), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:02:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 355 transitions. [2021-11-20 07:02:37,564 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 355 transitions. Word has length 43 [2021-11-20 07:02:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:37,564 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 355 transitions. [2021-11-20 07:02:37,565 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 07:02:37,565 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 355 transitions. [2021-11-20 07:02:37,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-20 07:02:37,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:37,566 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 07:02:37,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:37,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 07:02:37,792 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:02:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:37,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1596133469, now seen corresponding path program 1 times [2021-11-20 07:02:37,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:37,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123892632] [2021-11-20 07:02:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:37,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:37,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:37,953 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 07:02:37,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:37,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123892632] [2021-11-20 07:02:37,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123892632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:37,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287600638] [2021-11-20 07:02:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:37,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:37,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:37,960 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:37,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:02:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:38,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:02:38,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:38,313 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:02:38,313 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 07:02:38,317 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:02:38,318 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 07:02:38,694 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 07:02:38,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:39,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287600638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:39,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:02:39,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2021-11-20 07:02:39,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221502223] [2021-11-20 07:02:39,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:39,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:02:39,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:39,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:02:39,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:02:39,010 INFO L87 Difference]: Start difference. First operand 292 states and 355 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 07:02:39,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:39,722 INFO L93 Difference]: Finished difference Result 313 states and 368 transitions. [2021-11-20 07:02:39,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:02:39,722 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 07:02:39,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:39,728 INFO L225 Difference]: With dead ends: 313 [2021-11-20 07:02:39,728 INFO L226 Difference]: Without dead ends: 313 [2021-11-20 07:02:39,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2021-11-20 07:02:39,730 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 267 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:39,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 346 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 265 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2021-11-20 07:02:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-20 07:02:39,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 283. [2021-11-20 07:02:39,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 253 states have (on average 1.2806324110671936) internal successors, (324), 268 states have internal predecessors, (324), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-20 07:02:39,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 344 transitions. [2021-11-20 07:02:39,742 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 344 transitions. Word has length 43 [2021-11-20 07:02:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:39,742 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 344 transitions. [2021-11-20 07:02:39,743 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 07:02:39,743 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 344 transitions. [2021-11-20 07:02:39,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:02:39,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:39,744 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 07:02:39,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:39,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 07:02:39,968 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:02:39,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:39,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1419217069, now seen corresponding path program 1 times [2021-11-20 07:02:39,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:39,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736050322] [2021-11-20 07:02:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:39,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:40,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:40,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:02:40,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:40,104 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 07:02:40,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:40,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736050322] [2021-11-20 07:02:40,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736050322] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:40,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187026112] [2021-11-20 07:02:40,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:40,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:40,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:40,108 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:40,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:02:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:40,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 07:02:40,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:40,702 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:02:40,702 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 07:02:40,706 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:02:40,706 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 07:02:40,781 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 07:02:40,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:40,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187026112] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:40,894 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:02:40,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 13 [2021-11-20 07:02:40,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516164731] [2021-11-20 07:02:40,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:40,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 07:02:40,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:40,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 07:02:40,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:02:40,896 INFO L87 Difference]: Start difference. First operand 283 states and 344 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 07:02:41,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:41,291 INFO L93 Difference]: Finished difference Result 352 states and 416 transitions. [2021-11-20 07:02:41,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:02:41,292 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 07:02:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:41,293 INFO L225 Difference]: With dead ends: 352 [2021-11-20 07:02:41,293 INFO L226 Difference]: Without dead ends: 352 [2021-11-20 07:02:41,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-11-20 07:02:41,294 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 212 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:41,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 216 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 243 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2021-11-20 07:02:41,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-20 07:02:41,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 324. [2021-11-20 07:02:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 292 states have (on average 1.2945205479452055) internal successors, (378), 307 states have internal predecessors, (378), 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 07:02:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 400 transitions. [2021-11-20 07:02:41,322 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 400 transitions. Word has length 48 [2021-11-20 07:02:41,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:41,322 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 400 transitions. [2021-11-20 07:02:41,322 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 07:02:41,322 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 400 transitions. [2021-11-20 07:02:41,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:02:41,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:41,323 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 07:02:41,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:41,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 07:02:41,552 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 07:02:41,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:41,552 INFO L85 PathProgramCache]: Analyzing trace with hash -455995401, now seen corresponding path program 2 times [2021-11-20 07:02:41,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:41,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456291352] [2021-11-20 07:02:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:41,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:41,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:41,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:02:41,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:41,641 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 07:02:41,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:41,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456291352] [2021-11-20 07:02:41,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456291352] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:41,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895104959] [2021-11-20 07:02:41,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:02:41,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:41,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:41,643 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:41,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 07:02:41,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:02:41,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:02:41,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:02:41,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:41,921 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 07:02:41,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:41,987 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 25 treesize of output 21 [2021-11-20 07:02:42,075 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 07:02:42,182 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 07:02:42,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895104959] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:42,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:42,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 7] total 16 [2021-11-20 07:02:42,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817648677] [2021-11-20 07:02:42,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:42,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:02:42,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:42,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:02:42,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:02:42,185 INFO L87 Difference]: Start difference. First operand 324 states and 400 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 07:02:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:42,584 INFO L93 Difference]: Finished difference Result 383 states and 450 transitions. [2021-11-20 07:02:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:02:42,585 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 07:02:42,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:42,586 INFO L225 Difference]: With dead ends: 383 [2021-11-20 07:02:42,586 INFO L226 Difference]: Without dead ends: 383 [2021-11-20 07:02:42,587 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 07:02:42,588 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 335 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:42,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 174 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:02:42,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-20 07:02:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 324. [2021-11-20 07:02:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 292 states have (on average 1.273972602739726) internal successors, (372), 307 states have internal predecessors, (372), 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 07:02:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 394 transitions. [2021-11-20 07:02:42,597 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 394 transitions. Word has length 48 [2021-11-20 07:02:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:42,597 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 394 transitions. [2021-11-20 07:02:42,598 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 07:02:42,598 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 394 transitions. [2021-11-20 07:02:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:02:42,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:42,599 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 07:02:42,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:42,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:42,824 INFO L402 AbstractCegarLoop]: === Iteration 31 === 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 07:02:42,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:42,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2005037539, now seen corresponding path program 1 times [2021-11-20 07:02:42,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:42,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687508419] [2021-11-20 07:02:42,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:42,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:42,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:02:42,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:42,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687508419] [2021-11-20 07:02:42,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687508419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:42,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591934540] [2021-11-20 07:02:42,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:42,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:42,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:42,895 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:42,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 07:02:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:02:42,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:43,087 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:02:43,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:02:43,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591934540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:43,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:02:43,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-20 07:02:43,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414822779] [2021-11-20 07:02:43,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:43,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:02:43,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:43,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:02:43,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:02:43,091 INFO L87 Difference]: Start difference. First operand 324 states and 394 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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 07:02:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:43,106 INFO L93 Difference]: Finished difference Result 331 states and 398 transitions. [2021-11-20 07:02:43,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:02:43,107 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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 47 [2021-11-20 07:02:43,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:43,109 INFO L225 Difference]: With dead ends: 331 [2021-11-20 07:02:43,109 INFO L226 Difference]: Without dead ends: 331 [2021-11-20 07:02:43,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:02:43,111 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:43,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 91 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:02:43,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-11-20 07:02:43,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 323. [2021-11-20 07:02:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.2602739726027397) internal successors, (368), 306 states have internal predecessors, (368), 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 07:02:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 390 transitions. [2021-11-20 07:02:43,122 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 390 transitions. Word has length 47 [2021-11-20 07:02:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:43,122 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 390 transitions. [2021-11-20 07:02:43,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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 07:02:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 390 transitions. [2021-11-20 07:02:43,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:02:43,124 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:43,124 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] [2021-11-20 07:02:43,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:43,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-20 07:02:43,344 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:02:43,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:43,344 INFO L85 PathProgramCache]: Analyzing trace with hash -120223612, now seen corresponding path program 1 times [2021-11-20 07:02:43,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:43,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805283107] [2021-11-20 07:02:43,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:43,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:43,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:43,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:02:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:43,525 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:02:43,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:43,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805283107] [2021-11-20 07:02:43,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805283107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:43,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549612944] [2021-11-20 07:02:43,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:43,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:43,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:43,531 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:43,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 07:02:43,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:43,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:02:43,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:43,781 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:02:43,782 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 07:02:43,786 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:02:43,786 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 07:02:43,968 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 07:02:43,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:02:43,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549612944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:43,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:02:43,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 16 [2021-11-20 07:02:43,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830632224] [2021-11-20 07:02:43,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:43,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:02:43,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:43,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:02:43,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:02:43,970 INFO L87 Difference]: Start difference. First operand 323 states and 390 transitions. Second operand has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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 07:02:44,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:44,042 INFO L93 Difference]: Finished difference Result 354 states and 431 transitions. [2021-11-20 07:02:44,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:02:44,042 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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 48 [2021-11-20 07:02:44,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:44,043 INFO L225 Difference]: With dead ends: 354 [2021-11-20 07:02:44,043 INFO L226 Difference]: Without dead ends: 354 [2021-11-20 07:02:44,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:02:44,044 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 68 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:44,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 126 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 38 Invalid, 0 Unknown, 55 Unchecked, 0.0s Time] [2021-11-20 07:02:44,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-11-20 07:02:44,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 351. [2021-11-20 07:02:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 317 states have (on average 1.2649842271293374) internal successors, (401), 332 states have internal predecessors, (401), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-20 07:02:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 428 transitions. [2021-11-20 07:02:44,053 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 428 transitions. Word has length 48 [2021-11-20 07:02:44,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:44,054 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 428 transitions. [2021-11-20 07:02:44,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 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 07:02:44,054 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 428 transitions. [2021-11-20 07:02:44,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:02:44,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:44,055 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 07:02:44,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:44,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:44,276 INFO L402 AbstractCegarLoop]: === Iteration 33 === 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 07:02:44,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:44,276 INFO L85 PathProgramCache]: Analyzing trace with hash -2026621493, now seen corresponding path program 1 times [2021-11-20 07:02:44,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:44,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118691882] [2021-11-20 07:02:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:44,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:44,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:02:44,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:44,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118691882] [2021-11-20 07:02:44,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118691882] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:44,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049797823] [2021-11-20 07:02:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:44,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:44,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:44,347 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:44,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 07:02:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:44,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:02:44,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:02:44,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:02:44,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049797823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:44,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:02:44,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-20 07:02:44,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663913556] [2021-11-20 07:02:44,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:44,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:02:44,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:44,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:02:44,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:02:44,544 INFO L87 Difference]: Start difference. First operand 351 states and 428 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 07:02:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:44,577 INFO L93 Difference]: Finished difference Result 358 states and 431 transitions. [2021-11-20 07:02:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:02:44,578 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 48 [2021-11-20 07:02:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:44,579 INFO L225 Difference]: With dead ends: 358 [2021-11-20 07:02:44,579 INFO L226 Difference]: Without dead ends: 358 [2021-11-20 07:02:44,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:02:44,580 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 28 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:44,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 74 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:02:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-20 07:02:44,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 350. [2021-11-20 07:02:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 317 states have (on average 1.249211356466877) internal successors, (396), 331 states have internal predecessors, (396), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-20 07:02:44,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 423 transitions. [2021-11-20 07:02:44,588 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 423 transitions. Word has length 48 [2021-11-20 07:02:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:44,589 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 423 transitions. [2021-11-20 07:02:44,589 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 07:02:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 423 transitions. [2021-11-20 07:02:44,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 07:02:44,590 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:44,590 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 07:02:44,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:44,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-20 07:02:44,816 INFO L402 AbstractCegarLoop]: === Iteration 34 === 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 07:02:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:44,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1931998324, now seen corresponding path program 1 times [2021-11-20 07:02:44,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:44,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965851520] [2021-11-20 07:02:44,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:44,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:44,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:44,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:02:44,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:45,203 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 07:02:45,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:45,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965851520] [2021-11-20 07:02:45,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965851520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:45,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47368276] [2021-11-20 07:02:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:45,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:45,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:45,208 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:45,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 07:02:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:45,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-20 07:02:45,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:46,010 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:02:46,010 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 07:02:46,015 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:02:46,015 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 07:02:46,116 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 07:02:46,119 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 07:02:46,151 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 07:02:46,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:46,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47368276] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:46,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:02:46,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2021-11-20 07:02:46,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901370058] [2021-11-20 07:02:46,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:46,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:02:46,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:46,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:02:46,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:02:46,326 INFO L87 Difference]: Start difference. First operand 350 states and 423 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 07:02:46,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:46,805 INFO L93 Difference]: Finished difference Result 372 states and 433 transitions. [2021-11-20 07:02:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:02:46,805 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 07:02:46,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:46,807 INFO L225 Difference]: With dead ends: 372 [2021-11-20 07:02:46,807 INFO L226 Difference]: Without dead ends: 372 [2021-11-20 07:02:46,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2021-11-20 07:02:46,809 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 322 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:46,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 210 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 319 Invalid, 0 Unknown, 161 Unchecked, 0.2s Time] [2021-11-20 07:02:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-11-20 07:02:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 350. [2021-11-20 07:02:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 317 states have (on average 1.2460567823343849) internal successors, (395), 331 states have internal predecessors, (395), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2021-11-20 07:02:46,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 422 transitions. [2021-11-20 07:02:46,818 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 422 transitions. Word has length 50 [2021-11-20 07:02:46,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:46,818 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 422 transitions. [2021-11-20 07:02:46,818 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 07:02:46,818 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 422 transitions. [2021-11-20 07:02:46,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 07:02:46,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:46,819 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 07:02:46,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:47,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-20 07:02:47,038 INFO L402 AbstractCegarLoop]: === Iteration 35 === 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 07:02:47,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:47,039 INFO L85 PathProgramCache]: Analyzing trace with hash -124917674, now seen corresponding path program 2 times [2021-11-20 07:02:47,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:47,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028145039] [2021-11-20 07:02:47,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:47,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:47,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:47,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:02:47,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:47,548 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 07:02:47,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:47,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028145039] [2021-11-20 07:02:47,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028145039] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:47,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895848279] [2021-11-20 07:02:47,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:02:47,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:47,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:47,552 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:47,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 07:02:47,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:02:47,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:02:47,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:02:47,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:48,088 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 07:02:48,090 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 20 treesize of output 12 [2021-11-20 07:02:48,119 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 07:02:48,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:48,222 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 07:02:48,224 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 07:02:48,435 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-20 07:02:48,435 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 07:02:48,476 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-20 07:02:48,476 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 07:02:48,540 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 07:02:48,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895848279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:48,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:48,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 8] total 29 [2021-11-20 07:02:48,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140246002] [2021-11-20 07:02:48,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:48,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 07:02:48,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:48,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 07:02:48,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:02:48,541 INFO L87 Difference]: Start difference. First operand 350 states and 422 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 07:02:49,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:49,178 INFO L93 Difference]: Finished difference Result 393 states and 462 transitions. [2021-11-20 07:02:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:02:49,185 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 07:02:49,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:49,187 INFO L225 Difference]: With dead ends: 393 [2021-11-20 07:02:49,187 INFO L226 Difference]: Without dead ends: 393 [2021-11-20 07:02:49,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=1217, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 07:02:49,188 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 551 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:49,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 186 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:02:49,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-20 07:02:49,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 357. [2021-11-20 07:02:49,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 323 states have (on average 1.2321981424148607) internal successors, (398), 338 states have internal predecessors, (398), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:02:49,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 427 transitions. [2021-11-20 07:02:49,198 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 427 transitions. Word has length 50 [2021-11-20 07:02:49,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:49,198 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 427 transitions. [2021-11-20 07:02:49,199 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 07:02:49,199 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 427 transitions. [2021-11-20 07:02:49,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:02:49,200 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:49,200 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 07:02:49,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:49,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:49,416 INFO L402 AbstractCegarLoop]: === Iteration 36 === 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 07:02:49,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:49,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1599243231, now seen corresponding path program 1 times [2021-11-20 07:02:49,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:49,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384751834] [2021-11-20 07:02:49,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:49,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:49,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:02:49,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:49,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384751834] [2021-11-20 07:02:49,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384751834] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:49,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562520862] [2021-11-20 07:02:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:49,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:49,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:49,476 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:49,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 07:02:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:49,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:02:49,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:49,576 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 07:02:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:02:49,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 07:02:49,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562520862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:02:49,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:02:49,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-20 07:02:49,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450812586] [2021-11-20 07:02:49,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:02:49,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:02:49,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:49,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:02:49,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:02:49,654 INFO L87 Difference]: Start difference. First operand 357 states and 427 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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 07:02:49,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:49,708 INFO L93 Difference]: Finished difference Result 377 states and 440 transitions. [2021-11-20 07:02:49,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:02:49,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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 49 [2021-11-20 07:02:49,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:49,709 INFO L225 Difference]: With dead ends: 377 [2021-11-20 07:02:49,709 INFO L226 Difference]: Without dead ends: 377 [2021-11-20 07:02:49,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:02:49,710 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 21 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:49,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 133 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:02:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-20 07:02:49,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 357. [2021-11-20 07:02:49,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 323 states have (on average 1.2198142414860682) internal successors, (394), 338 states have internal predecessors, (394), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:02:49,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 423 transitions. [2021-11-20 07:02:49,719 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 423 transitions. Word has length 49 [2021-11-20 07:02:49,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:49,719 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 423 transitions. [2021-11-20 07:02:49,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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 07:02:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 423 transitions. [2021-11-20 07:02:49,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:02:49,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:49,721 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 07:02:49,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:49,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:49,940 INFO L402 AbstractCegarLoop]: === Iteration 37 === 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 07:02:49,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:49,940 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2021-11-20 07:02:49,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:49,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947199407] [2021-11-20 07:02:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:49,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:49,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:50,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:02:50,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:50,013 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 07:02:50,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:50,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947199407] [2021-11-20 07:02:50,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947199407] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:50,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853596797] [2021-11-20 07:02:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:50,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:50,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:50,016 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:50,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 07:02:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:50,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 07:02:50,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:50,230 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 07:02:50,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:50,458 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 07:02:50,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853596797] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:50,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:50,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-11-20 07:02:50,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123977256] [2021-11-20 07:02:50,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:50,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:02:50,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:50,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:02:50,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:02:50,462 INFO L87 Difference]: Start difference. First operand 357 states and 423 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 07:02:50,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:50,726 INFO L93 Difference]: Finished difference Result 379 states and 437 transitions. [2021-11-20 07:02:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:02:50,726 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 07:02:50,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:50,728 INFO L225 Difference]: With dead ends: 379 [2021-11-20 07:02:50,729 INFO L226 Difference]: Without dead ends: 379 [2021-11-20 07:02:50,729 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 07:02:50,729 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 207 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:50,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 140 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:02:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-11-20 07:02:50,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 357. [2021-11-20 07:02:50,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 323 states have (on average 1.2043343653250773) internal successors, (389), 338 states have internal predecessors, (389), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:02:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 418 transitions. [2021-11-20 07:02:50,740 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 418 transitions. Word has length 51 [2021-11-20 07:02:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:50,741 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 418 transitions. [2021-11-20 07:02:50,741 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 07:02:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 418 transitions. [2021-11-20 07:02:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 07:02:50,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:50,742 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 07:02:50,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:50,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-20 07:02:50,968 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 07:02:50,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:50,968 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2021-11-20 07:02:50,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:50,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719432732] [2021-11-20 07:02:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:50,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:51,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:51,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:02:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:51,042 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 07:02:51,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:51,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719432732] [2021-11-20 07:02:51,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719432732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:51,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936389216] [2021-11-20 07:02:51,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:51,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:51,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:51,048 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:51,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 07:02:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:51,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 07:02:51,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:51,308 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 07:02:51,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:51,574 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 07:02:51,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936389216] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:51,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:51,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2021-11-20 07:02:51,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219796615] [2021-11-20 07:02:51,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:51,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:02:51,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:51,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:02:51,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:02:51,576 INFO L87 Difference]: Start difference. First operand 357 states and 418 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 07:02:51,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:51,894 INFO L93 Difference]: Finished difference Result 375 states and 431 transitions. [2021-11-20 07:02:51,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:02:51,895 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 07:02:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:51,896 INFO L225 Difference]: With dead ends: 375 [2021-11-20 07:02:51,896 INFO L226 Difference]: Without dead ends: 375 [2021-11-20 07:02:51,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-11-20 07:02:51,897 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 278 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:51,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 218 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:02:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-20 07:02:51,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 356. [2021-11-20 07:02:51,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 323 states have (on average 1.1857585139318885) internal successors, (383), 337 states have internal predecessors, (383), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:02:51,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 412 transitions. [2021-11-20 07:02:51,906 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 412 transitions. Word has length 52 [2021-11-20 07:02:51,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:51,906 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 412 transitions. [2021-11-20 07:02:51,907 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 07:02:51,907 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 412 transitions. [2021-11-20 07:02:51,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 07:02:51,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:51,908 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 07:02:51,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:52,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-20 07:02:52,136 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:02:52,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:52,136 INFO L85 PathProgramCache]: Analyzing trace with hash 61178226, now seen corresponding path program 1 times [2021-11-20 07:02:52,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:52,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225446716] [2021-11-20 07:02:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:52,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:52,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:52,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:52,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:02:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:52,260 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 07:02:52,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:52,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225446716] [2021-11-20 07:02:52,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225446716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:52,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828308369] [2021-11-20 07:02:52,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:52,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:52,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:52,264 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:52,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 07:02:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:52,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 07:02:52,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:52,908 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:02:52,908 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 07:02:52,913 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:02:52,914 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 07:02:53,140 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 07:02:53,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:53,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828308369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:53,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:02:53,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2021-11-20 07:02:53,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420931057] [2021-11-20 07:02:53,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:53,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:02:53,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:53,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:02:53,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:02:53,335 INFO L87 Difference]: Start difference. First operand 356 states and 412 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 07:02:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:54,236 INFO L93 Difference]: Finished difference Result 462 states and 520 transitions. [2021-11-20 07:02:54,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 07:02:54,236 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 07:02:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:54,238 INFO L225 Difference]: With dead ends: 462 [2021-11-20 07:02:54,238 INFO L226 Difference]: Without dead ends: 462 [2021-11-20 07:02:54,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=1398, Unknown=0, NotChecked=0, Total=1806 [2021-11-20 07:02:54,239 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 570 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:54,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 314 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 329 Invalid, 0 Unknown, 303 Unchecked, 0.3s Time] [2021-11-20 07:02:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-11-20 07:02:54,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 356. [2021-11-20 07:02:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 323 states have (on average 1.173374613003096) internal successors, (379), 337 states have internal predecessors, (379), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:02:54,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 408 transitions. [2021-11-20 07:02:54,248 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 408 transitions. Word has length 54 [2021-11-20 07:02:54,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:54,249 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 408 transitions. [2021-11-20 07:02:54,249 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 07:02:54,249 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 408 transitions. [2021-11-20 07:02:54,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:02:54,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:54,250 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 07:02:54,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:54,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-20 07:02:54,476 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:02:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:54,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1335422540, now seen corresponding path program 3 times [2021-11-20 07:02:54,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:54,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629683121] [2021-11-20 07:02:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:54,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:54,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:54,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:02:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:54,644 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 07:02:54,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:54,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629683121] [2021-11-20 07:02:54,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629683121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:54,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870184680] [2021-11-20 07:02:54,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:02:54,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:54,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:54,648 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:54,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 07:02:54,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:02:54,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:02:54,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:02:54,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:54,900 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 07:02:55,041 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:02:55,041 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 07:02:55,155 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:02:55,156 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 07:02:55,396 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 07:02:55,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:55,527 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:02:55,527 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 07:02:55,843 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:02:55,843 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 07:02:55,927 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 07:02:56,112 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 07:02:56,129 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 07:02:56,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870184680] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:56,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:56,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2021-11-20 07:02:56,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800093445] [2021-11-20 07:02:56,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:56,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 07:02:56,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 07:02:56,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:02:56,130 INFO L87 Difference]: Start difference. First operand 356 states and 408 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 07:02:58,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:58,310 INFO L93 Difference]: Finished difference Result 459 states and 515 transitions. [2021-11-20 07:02:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-20 07:02:58,310 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 07:02:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:58,313 INFO L225 Difference]: With dead ends: 459 [2021-11-20 07:02:58,313 INFO L226 Difference]: Without dead ends: 459 [2021-11-20 07:02:58,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 109 SyntacticMatches, 34 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2143 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1205, Invalid=4051, Unknown=0, NotChecked=0, Total=5256 [2021-11-20 07:02:58,315 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 857 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 644 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:58,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 495 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 330 Invalid, 0 Unknown, 644 Unchecked, 0.3s Time] [2021-11-20 07:02:58,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-11-20 07:02:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 328. [2021-11-20 07:02:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 300 states have (on average 1.17) internal successors, (351), 311 states have internal predecessors, (351), 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 07:02:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 371 transitions. [2021-11-20 07:02:58,324 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 371 transitions. Word has length 56 [2021-11-20 07:02:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:58,325 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 371 transitions. [2021-11-20 07:02:58,325 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 07:02:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 371 transitions. [2021-11-20 07:02:58,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 07:02:58,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:58,326 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:58,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:58,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-20 07:02:58,552 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:02:58,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:58,552 INFO L85 PathProgramCache]: Analyzing trace with hash -170351524, now seen corresponding path program 1 times [2021-11-20 07:02:58,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:58,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750071676] [2021-11-20 07:02:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:58,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:58,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:02:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:58,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:02:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:02:58,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:58,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750071676] [2021-11-20 07:02:58,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750071676] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:58,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898269567] [2021-11-20 07:02:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:58,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:58,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:58,675 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:58,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 07:02:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:02:58,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 07:02:58,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:58,917 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:02:58,918 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 07:02:59,160 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-20 07:02:59,160 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 07:02:59,295 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:02:59,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:59,331 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 17 treesize of output 13 [2021-11-20 07:02:59,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-20 07:02:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:02:59,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898269567] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:59,701 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:02:59,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2021-11-20 07:02:59,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358009068] [2021-11-20 07:02:59,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:59,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:02:59,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:59,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:02:59,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:02:59,703 INFO L87 Difference]: Start difference. First operand 328 states and 371 transitions. Second operand has 24 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 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 07:02:59,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:59,953 INFO L93 Difference]: Finished difference Result 352 states and 394 transitions. [2021-11-20 07:02:59,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:02:59,953 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 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 57 [2021-11-20 07:02:59,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:59,954 INFO L225 Difference]: With dead ends: 352 [2021-11-20 07:02:59,954 INFO L226 Difference]: Without dead ends: 352 [2021-11-20 07:02:59,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 109 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:02:59,955 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 228 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:59,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 109 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 189 Invalid, 0 Unknown, 47 Unchecked, 0.1s Time] [2021-11-20 07:02:59,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-20 07:02:59,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 327. [2021-11-20 07:02:59,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 300 states have (on average 1.1666666666666667) internal successors, (350), 310 states have internal predecessors, (350), 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 07:02:59,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 370 transitions. [2021-11-20 07:02:59,962 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 370 transitions. Word has length 57 [2021-11-20 07:02:59,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:59,963 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 370 transitions. [2021-11-20 07:02:59,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 22 states have internal predecessors, (138), 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 07:02:59,963 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 370 transitions. [2021-11-20 07:02:59,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:02:59,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:59,964 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 07:02:59,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:00,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:00,184 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:03:00,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:00,184 INFO L85 PathProgramCache]: Analyzing trace with hash -917707913, now seen corresponding path program 1 times [2021-11-20 07:03:00,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:00,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398644238] [2021-11-20 07:03:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:00,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:00,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:03:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:00,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:03:00,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:00,355 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 07:03:00,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:00,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398644238] [2021-11-20 07:03:00,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398644238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:00,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107319581] [2021-11-20 07:03:00,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:00,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:00,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:00,357 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:00,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 07:03:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:00,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 07:03:00,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:00,993 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:03:00,993 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 07:03:00,998 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:03:00,998 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 07:03:01,277 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 07:03:01,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:01,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107319581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:01,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:01,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2021-11-20 07:03:01,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941106632] [2021-11-20 07:03:01,487 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:01,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:03:01,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:01,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:03:01,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-20 07:03:01,488 INFO L87 Difference]: Start difference. First operand 327 states and 370 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 07:03:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:01,831 INFO L93 Difference]: Finished difference Result 334 states and 376 transitions. [2021-11-20 07:03:01,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:03:01,832 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 07:03:01,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:01,833 INFO L225 Difference]: With dead ends: 334 [2021-11-20 07:03:01,833 INFO L226 Difference]: Without dead ends: 334 [2021-11-20 07:03:01,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2021-11-20 07:03:01,834 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 285 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:01,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 401 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 161 Invalid, 0 Unknown, 201 Unchecked, 0.1s Time] [2021-11-20 07:03:01,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-20 07:03:01,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 282. [2021-11-20 07:03:01,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 258 states have (on average 1.1627906976744187) internal successors, (300), 267 states have internal predecessors, (300), 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 07:03:01,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 318 transitions. [2021-11-20 07:03:01,839 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 318 transitions. Word has length 58 [2021-11-20 07:03:01,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:01,840 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 318 transitions. [2021-11-20 07:03:01,840 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 07:03:01,840 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 318 transitions. [2021-11-20 07:03:01,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:03:01,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:01,841 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:01,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-20 07:03:02,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:02,068 INFO L402 AbstractCegarLoop]: === Iteration 43 === 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 07:03:02,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:02,068 INFO L85 PathProgramCache]: Analyzing trace with hash -985929967, now seen corresponding path program 1 times [2021-11-20 07:03:02,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:02,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983072612] [2021-11-20 07:03:02,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:02,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:02,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:03:02,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:02,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:03:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:03:02,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:02,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983072612] [2021-11-20 07:03:02,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983072612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:02,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490619168] [2021-11-20 07:03:02,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:02,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:02,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:02,552 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:02,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-20 07:03:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:02,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 07:03:02,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:02,843 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:03:02,843 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 07:03:03,200 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-20 07:03:03,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 26 [2021-11-20 07:03:03,476 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 07:03:03,510 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:03:03,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:03,577 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 29 treesize of output 17 [2021-11-20 07:03:03,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:03:03,843 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 25 treesize of output 29 [2021-11-20 07:03:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:03:04,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490619168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:03:04,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:03:04,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 13] total 44 [2021-11-20 07:03:04,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723251466] [2021-11-20 07:03:04,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:04,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 07:03:04,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:04,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 07:03:04,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1850, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 07:03:04,225 INFO L87 Difference]: Start difference. First operand 282 states and 318 transitions. Second operand has 46 states, 42 states have (on average 3.619047619047619) internal successors, (152), 36 states have internal predecessors, (152), 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 07:03:05,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:05,260 INFO L93 Difference]: Finished difference Result 330 states and 368 transitions. [2021-11-20 07:03:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:03:05,261 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 3.619047619047619) internal successors, (152), 36 states have internal predecessors, (152), 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 58 [2021-11-20 07:03:05,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:05,263 INFO L225 Difference]: With dead ends: 330 [2021-11-20 07:03:05,263 INFO L226 Difference]: Without dead ends: 330 [2021-11-20 07:03:05,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=610, Invalid=2812, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 07:03:05,265 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 519 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:05,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 267 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 577 Invalid, 0 Unknown, 137 Unchecked, 0.4s Time] [2021-11-20 07:03:05,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-20 07:03:05,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 282. [2021-11-20 07:03:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 258 states have (on average 1.1589147286821706) internal successors, (299), 267 states have internal predecessors, (299), 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 07:03:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 317 transitions. [2021-11-20 07:03:05,271 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 317 transitions. Word has length 58 [2021-11-20 07:03:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:05,271 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 317 transitions. [2021-11-20 07:03:05,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 3.619047619047619) internal successors, (152), 36 states have internal predecessors, (152), 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 07:03:05,272 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 317 transitions. [2021-11-20 07:03:05,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:03:05,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:05,273 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] [2021-11-20 07:03:05,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-11-20 07:03:05,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-20 07:03:05,476 INFO L402 AbstractCegarLoop]: === Iteration 44 === 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 07:03:05,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1225182698, now seen corresponding path program 1 times [2021-11-20 07:03:05,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:05,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907009183] [2021-11-20 07:03:05,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:05,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:05,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:03:05,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:05,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:03:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:03:05,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:05,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907009183] [2021-11-20 07:03:05,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907009183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:05,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801156420] [2021-11-20 07:03:05,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:05,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:05,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:05,861 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:05,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-20 07:03:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:05,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-20 07:03:05,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:06,374 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:03:06,374 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 28 treesize of output 32 [2021-11-20 07:03:06,383 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:03:06,383 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 07:03:06,727 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:03:06,727 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 32 treesize of output 37 [2021-11-20 07:03:06,738 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 07:03:06,739 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 31 treesize of output 29 [2021-11-20 07:03:07,283 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 07:03:07,285 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 07:03:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-20 07:03:07,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:07,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801156420] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:07,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:07,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 24 [2021-11-20 07:03:07,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549180099] [2021-11-20 07:03:07,562 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:07,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:03:07,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:07,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:03:07,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2021-11-20 07:03:07,564 INFO L87 Difference]: Start difference. First operand 282 states and 317 transitions. Second operand has 26 states, 23 states have (on average 4.086956521739131) internal successors, (94), 20 states have internal predecessors, (94), 6 states have call successors, (6), 4 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 07:03:09,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:09,283 INFO L93 Difference]: Finished difference Result 344 states and 381 transitions. [2021-11-20 07:03:09,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-20 07:03:09,284 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 4.086956521739131) internal successors, (94), 20 states have internal predecessors, (94), 6 states have call successors, (6), 4 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 58 [2021-11-20 07:03:09,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:09,285 INFO L225 Difference]: With dead ends: 344 [2021-11-20 07:03:09,285 INFO L226 Difference]: Without dead ends: 344 [2021-11-20 07:03:09,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=722, Invalid=3700, Unknown=0, NotChecked=0, Total=4422 [2021-11-20 07:03:09,287 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 318 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 334 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:09,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 581 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 354 Invalid, 0 Unknown, 334 Unchecked, 0.3s Time] [2021-11-20 07:03:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-20 07:03:09,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 238. [2021-11-20 07:03:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 218 states have (on average 1.151376146788991) internal successors, (251), 225 states have internal predecessors, (251), 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 07:03:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 266 transitions. [2021-11-20 07:03:09,292 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 266 transitions. Word has length 58 [2021-11-20 07:03:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:09,292 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 266 transitions. [2021-11-20 07:03:09,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 4.086956521739131) internal successors, (94), 20 states have internal predecessors, (94), 6 states have call successors, (6), 4 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 07:03:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 266 transitions. [2021-11-20 07:03:09,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 07:03:09,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:09,294 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:09,328 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-20 07:03:09,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:09,508 INFO L402 AbstractCegarLoop]: === Iteration 45 === 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 07:03:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:09,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1709075571, now seen corresponding path program 1 times [2021-11-20 07:03:09,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:09,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701630885] [2021-11-20 07:03:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:09,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:09,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:03:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:09,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:03:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:03:09,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:09,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701630885] [2021-11-20 07:03:09,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701630885] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:09,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978714329] [2021-11-20 07:03:09,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:09,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:09,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:09,685 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:09,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-20 07:03:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:09,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 07:03:09,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:09,888 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 07:03:09,888 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 07:03:10,114 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-20 07:03:10,114 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 21 [2021-11-20 07:03:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:03:10,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:10,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978714329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:10,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:10,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-20 07:03:10,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408780106] [2021-11-20 07:03:10,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:10,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:03:10,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:10,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:03:10,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:03:10,633 INFO L87 Difference]: Start difference. First operand 238 states and 266 transitions. Second operand has 20 states, 16 states have (on average 5.3125) internal successors, (85), 13 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 07:03:11,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:11,475 INFO L93 Difference]: Finished difference Result 258 states and 283 transitions. [2021-11-20 07:03:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:03:11,476 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 5.3125) internal successors, (85), 13 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 60 [2021-11-20 07:03:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:11,477 INFO L225 Difference]: With dead ends: 258 [2021-11-20 07:03:11,477 INFO L226 Difference]: Without dead ends: 258 [2021-11-20 07:03:11,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=393, Invalid=1247, Unknown=0, NotChecked=0, Total=1640 [2021-11-20 07:03:11,478 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 281 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:11,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 354 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 600 Invalid, 0 Unknown, 115 Unchecked, 0.3s Time] [2021-11-20 07:03:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-20 07:03:11,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 237. [2021-11-20 07:03:11,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 218 states have (on average 1.146788990825688) internal successors, (250), 224 states have internal predecessors, (250), 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 07:03:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 265 transitions. [2021-11-20 07:03:11,483 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 265 transitions. Word has length 60 [2021-11-20 07:03:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:11,483 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 265 transitions. [2021-11-20 07:03:11,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 5.3125) internal successors, (85), 13 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 07:03:11,484 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 265 transitions. [2021-11-20 07:03:11,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:03:11,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:11,485 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 07:03:11,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:11,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-20 07:03:11,692 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:03:11,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:11,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1338644167, now seen corresponding path program 2 times [2021-11-20 07:03:11,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:11,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486448166] [2021-11-20 07:03:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:11,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:11,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:03:11,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:11,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:03:11,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 07:03:11,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:11,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486448166] [2021-11-20 07:03:11,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486448166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:11,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780002474] [2021-11-20 07:03:11,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:03:11,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:11,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:11,828 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:11,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-20 07:03:11,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:03:11,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:03:11,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 07:03:11,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:12,416 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:03:12,417 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 07:03:12,423 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:03:12,424 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 07:03:12,784 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 07:03:12,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:13,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780002474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:13,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:13,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2021-11-20 07:03:13,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098228595] [2021-11-20 07:03:13,055 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:13,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:03:13,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:13,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:03:13,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:03:13,056 INFO L87 Difference]: Start difference. First operand 237 states and 265 transitions. Second operand has 18 states, 16 states have (on average 5.5625) internal successors, (89), 14 states have internal predecessors, (89), 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 07:03:13,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:13,426 INFO L93 Difference]: Finished difference Result 334 states and 370 transitions. [2021-11-20 07:03:13,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:03:13,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 5.5625) internal successors, (89), 14 states have internal predecessors, (89), 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 62 [2021-11-20 07:03:13,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:13,428 INFO L225 Difference]: With dead ends: 334 [2021-11-20 07:03:13,428 INFO L226 Difference]: Without dead ends: 334 [2021-11-20 07:03:13,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 07:03:13,429 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 216 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:13,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 342 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 223 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2021-11-20 07:03:13,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-20 07:03:13,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 287. [2021-11-20 07:03:13,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 266 states have (on average 1.150375939849624) internal successors, (306), 272 states have internal predecessors, (306), 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 07:03:13,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 323 transitions. [2021-11-20 07:03:13,435 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 323 transitions. Word has length 62 [2021-11-20 07:03:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:13,435 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 323 transitions. [2021-11-20 07:03:13,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 5.5625) internal successors, (89), 14 states have internal predecessors, (89), 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 07:03:13,436 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 323 transitions. [2021-11-20 07:03:13,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:03:13,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:13,437 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 07:03:13,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:13,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-20 07:03:13,656 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:03:13,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash 23389955, now seen corresponding path program 3 times [2021-11-20 07:03:13,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:13,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9326586] [2021-11-20 07:03:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:13,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:03:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:03:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 65 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:03:13,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:13,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9326586] [2021-11-20 07:03:13,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9326586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:13,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131838011] [2021-11-20 07:03:13,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:03:13,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:13,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:13,836 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:13,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-20 07:03:13,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 07:03:13,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:03:13,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 07:03:13,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:14,188 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:03:14,188 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 07:03:14,211 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:03:14,211 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 07:03:14,677 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 07:03:14,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:15,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131838011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:15,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:15,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 18 [2021-11-20 07:03:15,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963378282] [2021-11-20 07:03:15,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:15,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:03:15,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:15,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:03:15,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:03:15,156 INFO L87 Difference]: Start difference. First operand 287 states and 323 transitions. Second operand has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 17 states have internal predecessors, (98), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:03:15,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:15,955 INFO L93 Difference]: Finished difference Result 357 states and 397 transitions. [2021-11-20 07:03:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:03:15,955 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 17 states have internal predecessors, (98), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 62 [2021-11-20 07:03:15,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:15,957 INFO L225 Difference]: With dead ends: 357 [2021-11-20 07:03:15,957 INFO L226 Difference]: Without dead ends: 357 [2021-11-20 07:03:15,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 93 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=413, Invalid=1567, Unknown=0, NotChecked=0, Total=1980 [2021-11-20 07:03:15,959 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 241 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:15,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 273 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 203 Invalid, 0 Unknown, 265 Unchecked, 0.1s Time] [2021-11-20 07:03:15,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-11-20 07:03:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 330. [2021-11-20 07:03:15,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 306 states have (on average 1.1470588235294117) internal successors, (351), 313 states have internal predecessors, (351), 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 07:03:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 371 transitions. [2021-11-20 07:03:15,966 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 371 transitions. Word has length 62 [2021-11-20 07:03:15,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:15,967 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 371 transitions. [2021-11-20 07:03:15,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.157894736842105) internal successors, (98), 17 states have internal predecessors, (98), 3 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:03:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 371 transitions. [2021-11-20 07:03:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:03:15,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:15,968 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] [2021-11-20 07:03:16,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:16,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-20 07:03:16,184 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:03:16,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:16,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1412438832, now seen corresponding path program 1 times [2021-11-20 07:03:16,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:16,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149723891] [2021-11-20 07:03:16,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:16,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:16,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:03:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:16,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:03:16,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:03:16,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:16,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149723891] [2021-11-20 07:03:16,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149723891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:16,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887815261] [2021-11-20 07:03:16,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:16,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:16,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:16,482 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:16,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-20 07:03:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:16,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 07:03:16,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:16,829 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:03:16,829 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 07:03:16,833 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:03:16,833 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 07:03:17,018 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:03:17,018 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 07:03:17,139 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:03:17,139 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 07:03:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:03:17,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:17,667 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:03:17,668 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 28 treesize of output 27 [2021-11-20 07:03:18,020 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:03:18,020 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 27 [2021-11-20 07:03:18,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887815261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:18,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:18,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 24 [2021-11-20 07:03:18,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20874092] [2021-11-20 07:03:18,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:18,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:03:18,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:18,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:03:18,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 07:03:18,147 INFO L87 Difference]: Start difference. First operand 330 states and 371 transitions. Second operand has 26 states, 25 states have (on average 4.56) internal successors, (114), 23 states have internal predecessors, (114), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:03:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:19,826 INFO L93 Difference]: Finished difference Result 484 states and 536 transitions. [2021-11-20 07:03:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 07:03:19,827 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.56) internal successors, (114), 23 states have internal predecessors, (114), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 62 [2021-11-20 07:03:19,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:19,828 INFO L225 Difference]: With dead ends: 484 [2021-11-20 07:03:19,828 INFO L226 Difference]: Without dead ends: 484 [2021-11-20 07:03:19,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 89 SyntacticMatches, 8 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=922, Invalid=4048, Unknown=0, NotChecked=0, Total=4970 [2021-11-20 07:03:19,831 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 482 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:19,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 418 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 357 Invalid, 0 Unknown, 412 Unchecked, 0.2s Time] [2021-11-20 07:03:19,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-20 07:03:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 289. [2021-11-20 07:03:19,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 267 states have (on average 1.142322097378277) 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, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-20 07:03:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 323 transitions. [2021-11-20 07:03:19,836 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 323 transitions. Word has length 62 [2021-11-20 07:03:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:19,836 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 323 transitions. [2021-11-20 07:03:19,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.56) internal successors, (114), 23 states have internal predecessors, (114), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:03:19,837 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 323 transitions. [2021-11-20 07:03:19,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:03:19,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:19,837 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:19,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-20 07:03:20,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-20 07:03:20,038 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:03:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:20,038 INFO L85 PathProgramCache]: Analyzing trace with hash 186260668, now seen corresponding path program 1 times [2021-11-20 07:03:20,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:20,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198083776] [2021-11-20 07:03:20,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:20,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:20,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:03:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:20,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:03:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-20 07:03:20,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:20,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198083776] [2021-11-20 07:03:20,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198083776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:20,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827731955] [2021-11-20 07:03:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:20,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:20,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:20,160 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:20,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-20 07:03:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:20,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-20 07:03:20,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:20,710 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:03:20,710 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 07:03:20,714 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:03:20,714 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 07:03:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 07:03:21,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:21,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827731955] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:21,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:21,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 16 [2021-11-20 07:03:21,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639379100] [2021-11-20 07:03:21,304 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:21,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 07:03:21,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:21,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 07:03:21,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:03:21,305 INFO L87 Difference]: Start difference. First operand 289 states and 323 transitions. Second operand has 18 states, 16 states have (on average 5.8125) internal successors, (93), 14 states have internal predecessors, (93), 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 07:03:21,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:21,688 INFO L93 Difference]: Finished difference Result 365 states and 405 transitions. [2021-11-20 07:03:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:03:21,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 5.8125) internal successors, (93), 14 states have internal predecessors, (93), 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 64 [2021-11-20 07:03:21,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:21,690 INFO L225 Difference]: With dead ends: 365 [2021-11-20 07:03:21,690 INFO L226 Difference]: Without dead ends: 365 [2021-11-20 07:03:21,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=893, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 07:03:21,691 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 261 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:21,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 345 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 160 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2021-11-20 07:03:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-20 07:03:21,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 326. [2021-11-20 07:03:21,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 301 states have (on average 1.1428571428571428) internal successors, (344), 309 states have internal predecessors, (344), 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 07:03:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 366 transitions. [2021-11-20 07:03:21,697 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 366 transitions. Word has length 64 [2021-11-20 07:03:21,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:21,697 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 366 transitions. [2021-11-20 07:03:21,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 5.8125) internal successors, (93), 14 states have internal predecessors, (93), 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 07:03:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 366 transitions. [2021-11-20 07:03:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:03:21,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:21,699 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:21,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:21,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:21,912 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:03:21,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:21,912 INFO L85 PathProgramCache]: Analyzing trace with hash -2010935661, now seen corresponding path program 1 times [2021-11-20 07:03:21,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:21,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198971662] [2021-11-20 07:03:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:21,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:21,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:03:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:22,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:03:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:03:22,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:22,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198971662] [2021-11-20 07:03:22,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198971662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:22,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114268902] [2021-11-20 07:03:22,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:22,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:22,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:22,238 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:22,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-20 07:03:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:22,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 07:03:22,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:22,598 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:03:22,598 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 07:03:22,602 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:03:22,602 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 07:03:22,794 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:03:22,794 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 07:03:22,923 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:03:22,923 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 07:03:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:03:23,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:23,483 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:03:23,483 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 28 treesize of output 27 [2021-11-20 07:03:23,804 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:03:23,805 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 27 [2021-11-20 07:03:23,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114268902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:23,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:23,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 24 [2021-11-20 07:03:23,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486321693] [2021-11-20 07:03:23,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:23,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:03:23,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:23,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:03:23,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 07:03:23,923 INFO L87 Difference]: Start difference. First operand 326 states and 366 transitions. Second operand has 26 states, 25 states have (on average 4.72) internal successors, (118), 23 states have internal predecessors, (118), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:03:25,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:25,416 INFO L93 Difference]: Finished difference Result 359 states and 397 transitions. [2021-11-20 07:03:25,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 07:03:25,416 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.72) internal successors, (118), 23 states have internal predecessors, (118), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 64 [2021-11-20 07:03:25,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:25,418 INFO L225 Difference]: With dead ends: 359 [2021-11-20 07:03:25,418 INFO L226 Difference]: Without dead ends: 359 [2021-11-20 07:03:25,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 92 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=835, Invalid=3455, Unknown=0, NotChecked=0, Total=4290 [2021-11-20 07:03:25,418 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 537 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 391 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:25,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 400 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 335 Invalid, 0 Unknown, 391 Unchecked, 0.2s Time] [2021-11-20 07:03:25,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-20 07:03:25,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 236. [2021-11-20 07:03:25,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 218 states have (on average 1.1376146788990826) internal successors, (248), 223 states have internal predecessors, (248), 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 07:03:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 263 transitions. [2021-11-20 07:03:25,422 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 263 transitions. Word has length 64 [2021-11-20 07:03:25,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:25,422 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 263 transitions. [2021-11-20 07:03:25,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.72) internal successors, (118), 23 states have internal predecessors, (118), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-20 07:03:25,422 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 263 transitions. [2021-11-20 07:03:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 07:03:25,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:25,423 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:25,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:25,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-20 07:03:25,624 INFO L402 AbstractCegarLoop]: === Iteration 51 === 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 07:03:25,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:25,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1170616042, now seen corresponding path program 2 times [2021-11-20 07:03:25,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:25,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272395851] [2021-11-20 07:03:25,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:25,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:25,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:03:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:25,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:03:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:03:25,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:25,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272395851] [2021-11-20 07:03:25,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272395851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:03:25,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47293436] [2021-11-20 07:03:25,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:03:25,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:25,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:25,875 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:25,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-20 07:03:25,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:03:25,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:03:25,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 07:03:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:26,084 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:03:26,084 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 07:03:26,363 INFO L354 Elim1Store]: treesize reduction 23, result has 47.7 percent of original size [2021-11-20 07:03:26,363 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 18 treesize of output 30 [2021-11-20 07:03:26,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 12 [2021-11-20 07:03:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:03:26,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:26,827 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 35 treesize of output 19 [2021-11-20 07:03:26,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:03:26,974 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 29 treesize of output 33 [2021-11-20 07:03:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:03:27,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47293436] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:03:27,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:03:27,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 40 [2021-11-20 07:03:27,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125091140] [2021-11-20 07:03:27,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:27,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-20 07:03:27,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:27,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-20 07:03:27,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1542, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 07:03:27,367 INFO L87 Difference]: Start difference. First operand 236 states and 263 transitions. Second operand has 42 states, 38 states have (on average 4.578947368421052) internal successors, (174), 33 states have internal predecessors, (174), 7 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:03:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:28,469 INFO L93 Difference]: Finished difference Result 275 states and 304 transitions. [2021-11-20 07:03:28,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:03:28,469 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 38 states have (on average 4.578947368421052) internal successors, (174), 33 states have internal predecessors, (174), 7 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 66 [2021-11-20 07:03:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:28,471 INFO L225 Difference]: With dead ends: 275 [2021-11-20 07:03:28,471 INFO L226 Difference]: Without dead ends: 275 [2021-11-20 07:03:28,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=634, Invalid=2788, Unknown=0, NotChecked=0, Total=3422 [2021-11-20 07:03:28,471 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 508 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:28,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 352 Invalid, 1237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 790 Invalid, 0 Unknown, 304 Unchecked, 0.4s Time] [2021-11-20 07:03:28,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-11-20 07:03:28,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 235. [2021-11-20 07:03:28,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 218 states have (on average 1.1330275229357798) internal successors, (247), 222 states have internal predecessors, (247), 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 07:03:28,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 262 transitions. [2021-11-20 07:03:28,476 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 262 transitions. Word has length 66 [2021-11-20 07:03:28,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:28,476 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 262 transitions. [2021-11-20 07:03:28,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 38 states have (on average 4.578947368421052) internal successors, (174), 33 states have internal predecessors, (174), 7 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-20 07:03:28,477 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 262 transitions. [2021-11-20 07:03:28,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 07:03:28,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:28,478 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 07:03:28,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-20 07:03:28,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:28,679 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 07:03:28,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:28,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1008566956, now seen corresponding path program 1 times [2021-11-20 07:03:28,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:28,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792589429] [2021-11-20 07:03:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:28,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:28,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 07:03:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:28,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-20 07:03:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:28,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-20 07:03:28,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:28,739 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 07:03:28,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:28,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792589429] [2021-11-20 07:03:28,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792589429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:03:28,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:03:28,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:03:28,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318616927] [2021-11-20 07:03:28,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:03:28,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 07:03:28,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:28,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 07:03:28,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 07:03:28,742 INFO L87 Difference]: Start difference. First operand 235 states and 262 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 07:03:28,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:28,793 INFO L93 Difference]: Finished difference Result 245 states and 271 transitions. [2021-11-20 07:03:28,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:03:28,794 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 07:03:28,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:28,795 INFO L225 Difference]: With dead ends: 245 [2021-11-20 07:03:28,795 INFO L226 Difference]: Without dead ends: 229 [2021-11-20 07:03:28,795 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 07:03:28,796 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:28,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 57 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:03:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-20 07:03:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 223. [2021-11-20 07:03:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 206 states have (on average 1.1262135922330097) internal successors, (232), 210 states have internal predecessors, (232), 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 07:03:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 247 transitions. [2021-11-20 07:03:28,801 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 247 transitions. Word has length 67 [2021-11-20 07:03:28,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:28,802 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 247 transitions. [2021-11-20 07:03:28,802 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 07:03:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 247 transitions. [2021-11-20 07:03:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-20 07:03:28,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:28,803 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 07:03:28,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-11-20 07:03:28,804 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 07:03:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:28,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1133646903, now seen corresponding path program 1 times [2021-11-20 07:03:28,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:28,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721083921] [2021-11-20 07:03:28,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:28,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:03:28,829 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 07:03:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:03:28,886 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 07:03:28,886 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 07:03:28,887 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2021-11-20 07:03:28,889 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATION (18 of 20 remaining) [2021-11-20 07:03:28,889 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATION (17 of 20 remaining) [2021-11-20 07:03:28,890 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2021-11-20 07:03:28,890 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2021-11-20 07:03:28,890 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2021-11-20 07:03:28,890 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2021-11-20 07:03:28,890 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATION (12 of 20 remaining) [2021-11-20 07:03:28,890 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATION (11 of 20 remaining) [2021-11-20 07:03:28,891 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATION (10 of 20 remaining) [2021-11-20 07:03:28,891 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATION (9 of 20 remaining) [2021-11-20 07:03:28,891 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2021-11-20 07:03:28,891 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2021-11-20 07:03:28,891 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2021-11-20 07:03:28,892 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2021-11-20 07:03:28,892 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2021-11-20 07:03:28,892 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2021-11-20 07:03:28,892 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2021-11-20 07:03:28,892 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2021-11-20 07:03:28,892 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2021-11-20 07:03:28,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-11-20 07:03:28,896 INFO L732 BasicCegarLoop]: Path program histogram: [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:28,899 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 07:03:28,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:03:28 BoogieIcfgContainer [2021-11-20 07:03:28,970 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 07:03:28,971 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 07:03:28,971 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 07:03:28,971 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 07:03:28,972 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:02:07" (3/4) ... [2021-11-20 07:03:28,975 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 07:03:28,975 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 07:03:28,975 INFO L158 Benchmark]: Toolchain (without parser) took 82336.23ms. Allocated memory was 102.8MB in the beginning and 192.9MB in the end (delta: 90.2MB). Free memory was 66.3MB in the beginning and 155.4MB in the end (delta: -89.2MB). Peak memory consumption was 215.6kB. Max. memory is 16.1GB. [2021-11-20 07:03:28,976 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 102.8MB. Free memory is still 55.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:03:28,976 INFO L158 Benchmark]: CACSL2BoogieTranslator took 605.80ms. Allocated memory is still 102.8MB. Free memory was 66.1MB in the beginning and 66.1MB in the end (delta: -42.6kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 07:03:28,976 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.83ms. Allocated memory is still 102.8MB. Free memory was 66.1MB in the beginning and 64.0MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:03:28,976 INFO L158 Benchmark]: Boogie Preprocessor took 30.93ms. Allocated memory is still 102.8MB. Free memory was 64.0MB in the beginning and 62.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:03:28,977 INFO L158 Benchmark]: RCFGBuilder took 429.00ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 62.2MB in the beginning and 106.0MB in the end (delta: -43.7MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. [2021-11-20 07:03:28,977 INFO L158 Benchmark]: TraceAbstraction took 81190.33ms. Allocated memory was 132.1MB in the beginning and 192.9MB in the end (delta: 60.8MB). Free memory was 106.0MB in the beginning and 156.5MB in the end (delta: -50.5MB). Peak memory consumption was 117.2MB. Max. memory is 16.1GB. [2021-11-20 07:03:28,977 INFO L158 Benchmark]: Witness Printer took 4.01ms. Allocated memory is still 192.9MB. Free memory was 156.5MB in the beginning and 155.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:03:28,978 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 102.8MB. Free memory is still 55.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 605.80ms. Allocated memory is still 102.8MB. Free memory was 66.1MB in the beginning and 66.1MB in the end (delta: -42.6kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.83ms. Allocated memory is still 102.8MB. Free memory was 66.1MB in the beginning and 64.0MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.93ms. Allocated memory is still 102.8MB. Free memory was 64.0MB in the beginning and 62.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 429.00ms. Allocated memory was 102.8MB in the beginning and 132.1MB in the end (delta: 29.4MB). Free memory was 62.2MB in the beginning and 106.0MB in the end (delta: -43.7MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. * TraceAbstraction took 81190.33ms. Allocated memory was 132.1MB in the beginning and 192.9MB in the end (delta: 60.8MB). Free memory was 106.0MB in the beginning and 156.5MB in the end (delta: -50.5MB). Peak memory consumption was 117.2MB. Max. memory is 16.1GB. * Witness Printer took 4.01ms. Allocated memory is still 192.9MB. Free memory was 156.5MB in the beginning and 155.4MB in the end (delta: 1.0MB). 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}] [L708] global = x [L709] 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: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: 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: 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. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 61 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 81.1s, 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, 13812 SdHoareTripleChecker+Valid, 9.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13797 mSDsluCounter, 13475 SdHoareTripleChecker+Invalid, 7.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 5188 IncrementalHoareTripleChecker+Unchecked, 11178 mSDsCounter, 2239 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13334 IncrementalHoareTripleChecker+Invalid, 20761 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2239 mSolverCounterUnsat, 2297 mSDtfsCounter, 13334 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3913 GetRequests, 2497 SyntacticMatches, 120 SemanticMatches, 1296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13948 ImplicationChecksByTransitivity, 28.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=501occurred in iteration=21, InterpolantAutomatonStates: 824, 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, 2677 StatesRemovedByMinimization, 51 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 38.6s InterpolantComputationTime, 3891 NumberOfCodeBlocks, 3883 NumberOfCodeBlocksAsserted, 104 NumberOfCheckSat, 4334 ConstructedInterpolants, 439 QuantifiedInterpolants, 55507 SizeOfPredicates, 150 NumberOfNonLiveVariables, 10575 ConjunctsInSsa, 731 ConjunctsInUnsatCore, 107 InterpolantComputations, 19 PerfectInterpolantSequences, 1566/3605 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 07:03:29,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/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_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/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_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/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_108723ba-3a67-43a0-813a-3cf0884fa8ab/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 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:03:31,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:03:31,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:03:31,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:03:31,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:03:31,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:03:31,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:03:31,423 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:03:31,426 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:03:31,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:03:31,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:03:31,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:03:31,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:03:31,432 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:03:31,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:03:31,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:03:31,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:03:31,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:03:31,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:03:31,442 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:03:31,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:03:31,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:03:31,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:03:31,452 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:03:31,459 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:03:31,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:03:31,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:03:31,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:03:31,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:03:31,467 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:03:31,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:03:31,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:03:31,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:03:31,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:03:31,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:03:31,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:03:31,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:03:31,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:03:31,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:03:31,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:03:31,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:03:31,479 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-20 07:03:31,525 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:03:31,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:03:31,526 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:03:31,526 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:03:31,527 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:03:31,528 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:03:31,529 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:03:31,529 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:03:31,529 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:03:31,530 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:03:31,531 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:03:31,531 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-20 07:03:31,531 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:03:31,531 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:03:31,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:03:31,532 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-20 07:03:31,532 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-20 07:03:31,533 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-20 07:03:31,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:03:31,533 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-20 07:03:31,533 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-20 07:03:31,533 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-20 07:03:31,534 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:03:31,534 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:03:31,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:03:31,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:03:31,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:03:31,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:03:31,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:03:31,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:03:31,536 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-20 07:03:31,536 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-20 07:03:31,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:03:31,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 07:03:31,537 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_108723ba-3a67-43a0-813a-3cf0884fa8ab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2021-11-20 07:03:31,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:03:31,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:03:31,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:03:31,911 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:03:31,912 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:03:31,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-11-20 07:03:31,982 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/data/a35960520/93cb7eb2c37947ddaf169b4abef91407/FLAGbe632c9f8 [2021-11-20 07:03:32,667 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:03:32,668 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-11-20 07:03:32,689 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/data/a35960520/93cb7eb2c37947ddaf169b4abef91407/FLAGbe632c9f8 [2021-11-20 07:03:32,886 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/data/a35960520/93cb7eb2c37947ddaf169b4abef91407 [2021-11-20 07:03:32,891 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:03:32,894 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:03:32,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:03:32,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:03:32,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:03:32,901 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:03:32" (1/1) ... [2021-11-20 07:03:32,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e310029 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:32, skipping insertion in model container [2021-11-20 07:03:32,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:03:32" (1/1) ... [2021-11-20 07:03:32,912 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:03:32,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:03:33,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:03:33,485 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:03:33,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:03:33,611 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:03:33,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:33 WrapperNode [2021-11-20 07:03:33,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:03:33,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:03:33,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:03:33,613 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:03:33,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:33" (1/1) ... [2021-11-20 07:03:33,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:33" (1/1) ... [2021-11-20 07:03:33,664 INFO L137 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2021-11-20 07:03:33,664 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:03:33,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:03:33,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:03:33,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:03:33,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:33" (1/1) ... [2021-11-20 07:03:33,674 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:33" (1/1) ... [2021-11-20 07:03:33,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:33" (1/1) ... [2021-11-20 07:03:33,678 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:33" (1/1) ... [2021-11-20 07:03:33,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:33" (1/1) ... [2021-11-20 07:03:33,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:33" (1/1) ... [2021-11-20 07:03:33,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:33" (1/1) ... [2021-11-20 07:03:33,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:03:33,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:03:33,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:03:33,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:03:33,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:33" (1/1) ... [2021-11-20 07:03:33,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:03:33,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:33,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:03:33,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:03:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-20 07:03:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-11-20 07:03:33,777 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-11-20 07:03:33,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:03:33,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:03:33,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 07:03:33,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:03:33,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 07:03:33,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 07:03:33,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:03:33,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:03:33,876 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:03:33,878 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:03:34,166 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:03:34,173 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:03:34,174 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-20 07:03:34,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:03:34 BoogieIcfgContainer [2021-11-20 07:03:34,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:03:34,178 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:03:34,178 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:03:34,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:03:34,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:03:32" (1/3) ... [2021-11-20 07:03:34,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3918d52c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:03:34, skipping insertion in model container [2021-11-20 07:03:34,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:03:33" (2/3) ... [2021-11-20 07:03:34,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3918d52c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:03:34, skipping insertion in model container [2021-11-20 07:03:34,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:03:34" (3/3) ... [2021-11-20 07:03:34,184 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2021-11-20 07:03:34,193 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:03:34,194 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-20 07:03:34,253 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:03:34,267 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 07:03:34,267 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-20 07:03:34,286 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 07:03:34,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 07:03:34,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:34,296 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:03:34,297 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 07:03:34,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:34,303 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2021-11-20 07:03:34,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:34,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273208633] [2021-11-20 07:03:34,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:34,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:34,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:34,322 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:34,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 07:03:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:34,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:03:34,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:34,660 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 07:03:34,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:34,720 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 07:03:34,721 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:03:34,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273208633] [2021-11-20 07:03:34,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273208633] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:03:34,728 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:03:34,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-20 07:03:34,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645165893] [2021-11-20 07:03:34,732 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:03:34,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:03:34,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:03:34,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:03:34,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:03:34,777 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 07:03:35,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:35,043 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2021-11-20 07:03:35,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:03:35,046 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 07:03:35,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:35,057 INFO L225 Difference]: With dead ends: 120 [2021-11-20 07:03:35,057 INFO L226 Difference]: Without dead ends: 114 [2021-11-20 07:03:35,059 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 07:03:35,063 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 100 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 118 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 07:03:35,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 118 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:03:35,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-20 07:03:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2021-11-20 07:03:35,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.65) internal successors, (99), 77 states have internal predecessors, (99), 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 07:03:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 117 transitions. [2021-11-20 07:03:35,120 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 117 transitions. Word has length 6 [2021-11-20 07:03:35,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:35,120 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 117 transitions. [2021-11-20 07:03:35,121 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 07:03:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 117 transitions. [2021-11-20 07:03:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 07:03:35,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:35,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 07:03:35,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-20 07:03:35,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:03:35,334 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 07:03:35,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2021-11-20 07:03:35,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:35,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1849171621] [2021-11-20 07:03:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:35,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:35,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:35,338 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:35,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 07:03:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:35,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:03:35,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:35,534 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 07:03:35,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:35,887 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 07:03:35,887 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:03:35,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1849171621] [2021-11-20 07:03:35,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1849171621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:03:35,888 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:03:35,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-20 07:03:35,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440505549] [2021-11-20 07:03:35,888 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:03:35,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 07:03:35,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:03:35,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 07:03:35,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-20 07:03:35,890 INFO L87 Difference]: Start difference. First operand 87 states and 117 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 07:03:36,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:36,480 INFO L93 Difference]: Finished difference Result 223 states and 301 transitions. [2021-11-20 07:03:36,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:03:36,482 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 07:03:36,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:36,486 INFO L225 Difference]: With dead ends: 223 [2021-11-20 07:03:36,486 INFO L226 Difference]: Without dead ends: 223 [2021-11-20 07:03:36,486 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 07:03:36,492 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 223 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:36,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 209 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:03:36,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-20 07:03:36,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 168. [2021-11-20 07:03:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 133 states have (on average 1.6466165413533835) internal successors, (219), 151 states have internal predecessors, (219), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-20 07:03:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 256 transitions. [2021-11-20 07:03:36,528 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 256 transitions. Word has length 6 [2021-11-20 07:03:36,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:36,529 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 256 transitions. [2021-11-20 07:03:36,529 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 07:03:36,530 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 256 transitions. [2021-11-20 07:03:36,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 07:03:36,530 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:36,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:36,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:36,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:03:36,742 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 07:03:36,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:36,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2021-11-20 07:03:36,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:36,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [633087942] [2021-11-20 07:03:36,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:36,744 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:36,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:36,745 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:36,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 07:03:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:36,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:03:36,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:36,953 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 07:03:36,967 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 07:03:36,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:37,057 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 07:03:37,057 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:03:37,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [633087942] [2021-11-20 07:03:37,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [633087942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:03:37,058 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:03:37,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-20 07:03:37,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629462919] [2021-11-20 07:03:37,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:03:37,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:03:37,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:03:37,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:03:37,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:03:37,060 INFO L87 Difference]: Start difference. First operand 168 states and 256 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 07:03:37,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:37,537 INFO L93 Difference]: Finished difference Result 246 states and 351 transitions. [2021-11-20 07:03:37,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:03:37,538 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 07:03:37,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:37,541 INFO L225 Difference]: With dead ends: 246 [2021-11-20 07:03:37,541 INFO L226 Difference]: Without dead ends: 246 [2021-11-20 07:03:37,542 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 07:03:37,543 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 145 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:37,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 272 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:03:37,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-20 07:03:37,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 171. [2021-11-20 07:03:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.6323529411764706) internal successors, (222), 154 states have internal predecessors, (222), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-20 07:03:37,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 259 transitions. [2021-11-20 07:03:37,594 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 259 transitions. Word has length 7 [2021-11-20 07:03:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:37,595 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 259 transitions. [2021-11-20 07:03:37,595 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 07:03:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 259 transitions. [2021-11-20 07:03:37,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 07:03:37,597 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:37,597 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:37,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:37,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:03:37,816 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 07:03:37,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:37,817 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2021-11-20 07:03:37,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:37,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143814921] [2021-11-20 07:03:37,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:37,818 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:37,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:37,819 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:37,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 07:03:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:37,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:03:37,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:38,038 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 07:03:38,043 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 07:03:38,072 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 07:03:38,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:38,181 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 07:03:38,181 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:03:38,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143814921] [2021-11-20 07:03:38,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143814921] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:03:38,182 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:03:38,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-20 07:03:38,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315124110] [2021-11-20 07:03:38,182 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:03:38,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:03:38,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:03:38,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:03:38,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:03:38,184 INFO L87 Difference]: Start difference. First operand 171 states and 259 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 07:03:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:38,929 INFO L93 Difference]: Finished difference Result 352 states and 461 transitions. [2021-11-20 07:03:38,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:03:38,930 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 07:03:38,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:38,934 INFO L225 Difference]: With dead ends: 352 [2021-11-20 07:03:38,934 INFO L226 Difference]: Without dead ends: 352 [2021-11-20 07:03:38,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:03:38,936 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 286 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:38,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 324 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:03:38,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-20 07:03:38,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 240. [2021-11-20 07:03:38,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 199 states have (on average 1.5979899497487438) internal successors, (318), 221 states have internal predecessors, (318), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2021-11-20 07:03:38,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 369 transitions. [2021-11-20 07:03:38,962 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 369 transitions. Word has length 8 [2021-11-20 07:03:38,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:38,962 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 369 transitions. [2021-11-20 07:03:38,962 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 07:03:38,963 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 369 transitions. [2021-11-20 07:03:38,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 07:03:38,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:38,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:38,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:39,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:03:39,174 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 07:03:39,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:39,175 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2021-11-20 07:03:39,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:39,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [337343492] [2021-11-20 07:03:39,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:39,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:39,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:39,179 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:39,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 07:03:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:39,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:03:39,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:39,305 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 07:03:39,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:39,349 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 07:03:39,349 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:03:39,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [337343492] [2021-11-20 07:03:39,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [337343492] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:03:39,351 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:03:39,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-20 07:03:39,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804260653] [2021-11-20 07:03:39,352 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:03:39,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:03:39,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:03:39,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:03:39,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:03:39,354 INFO L87 Difference]: Start difference. First operand 240 states and 369 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 07:03:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:39,651 INFO L93 Difference]: Finished difference Result 344 states and 478 transitions. [2021-11-20 07:03:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:03:39,652 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 07:03:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:39,655 INFO L225 Difference]: With dead ends: 344 [2021-11-20 07:03:39,655 INFO L226 Difference]: Without dead ends: 344 [2021-11-20 07:03:39,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:03:39,657 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 286 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:39,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 232 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:03:39,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-20 07:03:39,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 282. [2021-11-20 07:03:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 238 states have (on average 1.5630252100840336) internal successors, (372), 262 states have internal predecessors, (372), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2021-11-20 07:03:39,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 422 transitions. [2021-11-20 07:03:39,678 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 422 transitions. Word has length 9 [2021-11-20 07:03:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:39,678 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 422 transitions. [2021-11-20 07:03:39,678 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 07:03:39,679 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 422 transitions. [2021-11-20 07:03:39,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 07:03:39,679 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:39,679 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:39,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-11-20 07:03:39,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:03:39,896 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 07:03:39,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:39,897 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2021-11-20 07:03:39,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:39,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1738038578] [2021-11-20 07:03:39,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:39,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:39,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:39,899 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:39,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 07:03:39,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:39,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:03:39,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:40,065 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 07:03:40,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:40,132 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 07:03:40,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:03:40,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1738038578] [2021-11-20 07:03:40,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1738038578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:03:40,133 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:03:40,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-20 07:03:40,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867628495] [2021-11-20 07:03:40,133 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:03:40,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:03:40,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:03:40,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:03:40,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:03:40,135 INFO L87 Difference]: Start difference. First operand 282 states and 422 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 07:03:40,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:40,594 INFO L93 Difference]: Finished difference Result 343 states and 450 transitions. [2021-11-20 07:03:40,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:03:40,594 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 07:03:40,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:40,597 INFO L225 Difference]: With dead ends: 343 [2021-11-20 07:03:40,597 INFO L226 Difference]: Without dead ends: 343 [2021-11-20 07:03:40,598 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 07:03:40,599 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 345 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:40,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 266 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:03:40,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-20 07:03:40,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 283. [2021-11-20 07:03:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 239 states have (on average 1.5606694560669456) internal successors, (373), 263 states have internal predecessors, (373), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-20 07:03:40,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 416 transitions. [2021-11-20 07:03:40,623 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 416 transitions. Word has length 10 [2021-11-20 07:03:40,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:40,623 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 416 transitions. [2021-11-20 07:03:40,624 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 07:03:40,624 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 416 transitions. [2021-11-20 07:03:40,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 07:03:40,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:40,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:40,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:40,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:03:40,836 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 07:03:40,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:40,836 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2021-11-20 07:03:40,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:40,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2110052945] [2021-11-20 07:03:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:40,837 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:40,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:40,838 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:40,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 07:03:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:40,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:03:40,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:41,229 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 07:03:41,242 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 07:03:41,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:41,431 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 07:03:41,431 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:03:41,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2110052945] [2021-11-20 07:03:41,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2110052945] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:03:41,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:41,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-20 07:03:41,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372363461] [2021-11-20 07:03:41,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:41,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:03:41,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:03:41,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:03:41,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:03:41,434 INFO L87 Difference]: Start difference. First operand 283 states and 416 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 07:03:41,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:41,934 INFO L93 Difference]: Finished difference Result 499 states and 722 transitions. [2021-11-20 07:03:41,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:03:41,936 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 07:03:41,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:41,940 INFO L225 Difference]: With dead ends: 499 [2021-11-20 07:03:41,940 INFO L226 Difference]: Without dead ends: 499 [2021-11-20 07:03:41,940 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 07:03:41,941 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 253 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:41,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 317 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:03:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2021-11-20 07:03:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 299. [2021-11-20 07:03:41,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 255 states have (on average 1.5490196078431373) internal successors, (395), 279 states have internal predecessors, (395), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-20 07:03:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 438 transitions. [2021-11-20 07:03:41,961 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 438 transitions. Word has length 15 [2021-11-20 07:03:41,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:41,961 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 438 transitions. [2021-11-20 07:03:41,962 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 07:03:41,962 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 438 transitions. [2021-11-20 07:03:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 07:03:41,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:41,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:41,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:42,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:03:42,175 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 07:03:42,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:42,176 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2021-11-20 07:03:42,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:42,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283783099] [2021-11-20 07:03:42,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:42,176 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:42,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:42,177 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:42,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 07:03:42,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:42,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-20 07:03:42,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:42,631 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 07:03:42,636 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 07:03:42,667 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 07:03:42,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:42,887 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 07:03:42,887 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:03:42,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283783099] [2021-11-20 07:03:42,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283783099] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:03:42,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:42,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-20 07:03:42,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128136507] [2021-11-20 07:03:42,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:42,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:03:42,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:03:42,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:03:42,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:03:42,891 INFO L87 Difference]: Start difference. First operand 299 states and 438 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 07:03:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:44,092 INFO L93 Difference]: Finished difference Result 586 states and 774 transitions. [2021-11-20 07:03:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:03:44,093 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 07:03:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:44,097 INFO L225 Difference]: With dead ends: 586 [2021-11-20 07:03:44,097 INFO L226 Difference]: Without dead ends: 586 [2021-11-20 07:03:44,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-11-20 07:03:44,099 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 584 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 584 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:44,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [584 Valid, 508 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-20 07:03:44,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-11-20 07:03:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 312. [2021-11-20 07:03:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 268 states have (on average 1.544776119402985) internal successors, (414), 292 states have internal predecessors, (414), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-20 07:03:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 457 transitions. [2021-11-20 07:03:44,118 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 457 transitions. Word has length 16 [2021-11-20 07:03:44,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:44,118 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 457 transitions. [2021-11-20 07:03:44,119 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 07:03:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 457 transitions. [2021-11-20 07:03:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:03:44,120 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:44,120 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 07:03:44,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:44,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:03:44,332 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 07:03:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:44,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199734, now seen corresponding path program 1 times [2021-11-20 07:03:44,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:44,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101975128] [2021-11-20 07:03:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:44,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:44,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:44,334 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:44,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 07:03:44,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:44,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:03:44,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:44,443 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 07:03:44,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:44,490 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 07:03:44,491 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:03:44,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101975128] [2021-11-20 07:03:44,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101975128] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:03:44,491 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:03:44,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-11-20 07:03:44,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443181357] [2021-11-20 07:03:44,492 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:03:44,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:03:44,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:03:44,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:03:44,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:03:44,494 INFO L87 Difference]: Start difference. First operand 312 states and 457 transitions. Second operand has 3 states, 2 states have (on average 8.5) 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 07:03:44,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:44,520 INFO L93 Difference]: Finished difference Result 456 states and 666 transitions. [2021-11-20 07:03:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:03:44,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) 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 07:03:44,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:44,524 INFO L225 Difference]: With dead ends: 456 [2021-11-20 07:03:44,525 INFO L226 Difference]: Without dead ends: 456 [2021-11-20 07:03:44,525 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 07:03:44,528 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 47 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:44,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 108 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:03:44,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-11-20 07:03:44,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 439. [2021-11-20 07:03:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 383 states have (on average 1.5352480417754568) internal successors, (588), 412 states have internal predecessors, (588), 15 states have call successors, (15), 11 states have call predecessors, (15), 23 states have return successors, (55), 15 states have call predecessors, (55), 15 states have call successors, (55) [2021-11-20 07:03:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 658 transitions. [2021-11-20 07:03:44,552 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 658 transitions. Word has length 18 [2021-11-20 07:03:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:44,553 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 658 transitions. [2021-11-20 07:03:44,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) 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 07:03:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 658 transitions. [2021-11-20 07:03:44,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-20 07:03:44,554 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:44,555 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 07:03:44,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:44,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:03:44,767 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:03:44,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:44,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199478, now seen corresponding path program 1 times [2021-11-20 07:03:44,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:44,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753206999] [2021-11-20 07:03:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:44,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:44,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:44,770 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:44,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 07:03:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:44,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:03:44,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:44,949 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 07:03:44,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:45,047 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 07:03:45,048 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:03:45,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753206999] [2021-11-20 07:03:45,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753206999] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:03:45,048 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:03:45,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-20 07:03:45,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146874891] [2021-11-20 07:03:45,049 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:03:45,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:03:45,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:03:45,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:03:45,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:03:45,050 INFO L87 Difference]: Start difference. First operand 439 states and 658 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 07:03:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:45,090 INFO L93 Difference]: Finished difference Result 489 states and 701 transitions. [2021-11-20 07:03:45,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:03:45,091 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 07:03:45,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:45,095 INFO L225 Difference]: With dead ends: 489 [2021-11-20 07:03:45,095 INFO L226 Difference]: Without dead ends: 489 [2021-11-20 07:03:45,095 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 07:03:45,097 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 32 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:45,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 108 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:03:45,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-11-20 07:03:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 471. [2021-11-20 07:03:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 412 states have (on average 1.5048543689320388) internal successors, (620), 442 states have internal predecessors, (620), 16 states have call successors, (16), 12 states have call predecessors, (16), 25 states have return successors, (57), 16 states have call predecessors, (57), 16 states have call successors, (57) [2021-11-20 07:03:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 693 transitions. [2021-11-20 07:03:45,117 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 693 transitions. Word has length 18 [2021-11-20 07:03:45,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:45,118 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 693 transitions. [2021-11-20 07:03:45,118 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 07:03:45,118 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 693 transitions. [2021-11-20 07:03:45,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 07:03:45,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:45,119 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:45,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:45,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:03:45,331 INFO L402 AbstractCegarLoop]: === Iteration 11 === 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 07:03:45,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:45,331 INFO L85 PathProgramCache]: Analyzing trace with hash 772383166, now seen corresponding path program 1 times [2021-11-20 07:03:45,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:45,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1270613302] [2021-11-20 07:03:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:45,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:45,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:45,333 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:45,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 07:03:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:45,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:03:45,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:45,517 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 07:03:45,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:45,590 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 07:03:45,590 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:03:45,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1270613302] [2021-11-20 07:03:45,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1270613302] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:03:45,590 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:03:45,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-20 07:03:45,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453923188] [2021-11-20 07:03:45,591 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:03:45,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:03:45,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:03:45,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:03:45,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:03:45,592 INFO L87 Difference]: Start difference. First operand 471 states and 693 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 07:03:45,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:45,694 INFO L93 Difference]: Finished difference Result 503 states and 702 transitions. [2021-11-20 07:03:45,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:03:45,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 19 [2021-11-20 07:03:45,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:45,698 INFO L225 Difference]: With dead ends: 503 [2021-11-20 07:03:45,698 INFO L226 Difference]: Without dead ends: 503 [2021-11-20 07:03:45,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 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 07:03:45,699 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 92 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:45,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 149 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:03:45,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-11-20 07:03:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 473. [2021-11-20 07:03:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 414 states have (on average 1.4927536231884058) internal successors, (618), 444 states have internal predecessors, (618), 16 states have call successors, (16), 12 states have call predecessors, (16), 25 states have return successors, (57), 16 states have call predecessors, (57), 16 states have call successors, (57) [2021-11-20 07:03:45,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 691 transitions. [2021-11-20 07:03:45,727 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 691 transitions. Word has length 19 [2021-11-20 07:03:45,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:45,729 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 691 transitions. [2021-11-20 07:03:45,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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 07:03:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 691 transitions. [2021-11-20 07:03:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 07:03:45,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:45,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:03:45,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:45,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:03:45,944 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:03:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:45,945 INFO L85 PathProgramCache]: Analyzing trace with hash -947150002, now seen corresponding path program 1 times [2021-11-20 07:03:45,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:45,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [188389392] [2021-11-20 07:03:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:45,946 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:45,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:45,946 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:45,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 07:03:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:46,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:03:46,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:46,293 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 07:03:46,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:47,174 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 07:03:47,174 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:03:47,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [188389392] [2021-11-20 07:03:47,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [188389392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:03:47,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:47,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2021-11-20 07:03:47,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238373140] [2021-11-20 07:03:47,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:47,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:03:47,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:03:47,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:03:47,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:03:47,175 INFO L87 Difference]: Start difference. First operand 473 states and 691 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 07:03:48,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:48,041 INFO L93 Difference]: Finished difference Result 572 states and 799 transitions. [2021-11-20 07:03:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:03:48,043 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 07:03:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:48,046 INFO L225 Difference]: With dead ends: 572 [2021-11-20 07:03:48,046 INFO L226 Difference]: Without dead ends: 572 [2021-11-20 07:03:48,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:03:48,047 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 160 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:48,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 321 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:03:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-11-20 07:03:48,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 488. [2021-11-20 07:03:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 429 states have (on average 1.4895104895104896) internal successors, (639), 459 states have internal predecessors, (639), 16 states have call successors, (16), 12 states have call predecessors, (16), 25 states have return successors, (57), 16 states have call predecessors, (57), 16 states have call successors, (57) [2021-11-20 07:03:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 712 transitions. [2021-11-20 07:03:48,072 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 712 transitions. Word has length 20 [2021-11-20 07:03:48,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:48,073 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 712 transitions. [2021-11-20 07:03:48,073 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 07:03:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 712 transitions. [2021-11-20 07:03:48,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 07:03:48,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:48,077 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-20 07:03:48,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:48,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:03:48,290 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 07:03:48,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:48,290 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 1 times [2021-11-20 07:03:48,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:48,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936940480] [2021-11-20 07:03:48,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:48,291 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:48,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:48,292 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:48,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 07:03:48,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:48,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:03:48,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:48,420 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 07:03:48,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:48,514 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 07:03:48,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:03:48,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936940480] [2021-11-20 07:03:48,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936940480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:03:48,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:48,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-20 07:03:48,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509212673] [2021-11-20 07:03:48,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:48,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:03:48,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:03:48,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:03:48,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:03:48,518 INFO L87 Difference]: Start difference. First operand 488 states and 712 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 07:03:48,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:48,636 INFO L93 Difference]: Finished difference Result 622 states and 854 transitions. [2021-11-20 07:03:48,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:03:48,637 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 07:03:48,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:48,641 INFO L225 Difference]: With dead ends: 622 [2021-11-20 07:03:48,641 INFO L226 Difference]: Without dead ends: 622 [2021-11-20 07:03:48,642 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 07:03:48,643 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 89 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:48,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 509 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:03:48,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-20 07:03:48,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 438. [2021-11-20 07:03:48,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 381 states have (on average 1.4015748031496063) internal successors, (534), 409 states have internal predecessors, (534), 16 states have call successors, (16), 12 states have call predecessors, (16), 23 states have return successors, (55), 16 states have call predecessors, (55), 16 states have call successors, (55) [2021-11-20 07:03:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 605 transitions. [2021-11-20 07:03:48,668 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 605 transitions. Word has length 22 [2021-11-20 07:03:48,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:48,669 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 605 transitions. [2021-11-20 07:03:48,669 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 07:03:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 605 transitions. [2021-11-20 07:03:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-20 07:03:48,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:48,671 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 07:03:48,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:48,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:03:48,887 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:03:48,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:48,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1243788554, now seen corresponding path program 1 times [2021-11-20 07:03:48,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:48,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597898414] [2021-11-20 07:03:48,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:48,888 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:48,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:48,889 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:48,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 07:03:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:48,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 07:03:48,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:49,021 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 07:03:49,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:49,087 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 07:03:49,087 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:03:49,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597898414] [2021-11-20 07:03:49,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597898414] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:03:49,088 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:03:49,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 07:03:49,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245897400] [2021-11-20 07:03:49,090 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:03:49,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:03:49,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:03:49,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:03:49,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:03:49,091 INFO L87 Difference]: Start difference. First operand 438 states and 605 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 07:03:49,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:49,099 INFO L93 Difference]: Finished difference Result 311 states and 413 transitions. [2021-11-20 07:03:49,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:03:49,099 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 07:03:49,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:49,102 INFO L225 Difference]: With dead ends: 311 [2021-11-20 07:03:49,102 INFO L226 Difference]: Without dead ends: 311 [2021-11-20 07:03:49,102 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 07:03:49,103 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 127 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 07:03:49,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 127 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:03:49,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-20 07:03:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2021-11-20 07:03:49,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 266 states have (on average 1.387218045112782) internal successors, (369), 290 states have internal predecessors, (369), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-20 07:03:49,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 412 transitions. [2021-11-20 07:03:49,117 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 412 transitions. Word has length 25 [2021-11-20 07:03:49,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:49,118 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 412 transitions. [2021-11-20 07:03:49,118 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 07:03:49,118 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 412 transitions. [2021-11-20 07:03:49,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 07:03:49,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:49,120 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 07:03:49,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:49,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:03:49,331 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:03:49,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:49,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1125506638, now seen corresponding path program 1 times [2021-11-20 07:03:49,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:03:49,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717682197] [2021-11-20 07:03:49,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:49,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:03:49,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:03:49,333 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:03:49,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 07:03:49,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:03:49,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:03:49,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:49,905 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:03:49,906 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 07:03:49,913 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:03:49,913 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 07:03:50,039 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 07:03:50,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:04,695 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 07:04:04,695 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:04:04,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717682197] [2021-11-20 07:04:04,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717682197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:04:04,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:04:04,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-11-20 07:04:04,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061746111] [2021-11-20 07:04:04,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:04,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:04:04,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:04:04,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:04:04,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=94, Unknown=3, NotChecked=0, Total=132 [2021-11-20 07:04:04,697 INFO L87 Difference]: Start difference. First operand 310 states and 412 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 07:04:06,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:04:06,064 INFO L93 Difference]: Finished difference Result 405 states and 514 transitions. [2021-11-20 07:04:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:04:06,065 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 07:04:06,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:04:06,068 INFO L225 Difference]: With dead ends: 405 [2021-11-20 07:04:06,068 INFO L226 Difference]: Without dead ends: 405 [2021-11-20 07:04:06,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=71, Invalid=166, Unknown=3, NotChecked=0, Total=240 [2021-11-20 07:04:06,069 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 179 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:04:06,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 605 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 177 Invalid, 0 Unknown, 264 Unchecked, 1.0s Time] [2021-11-20 07:04:06,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-20 07:04:06,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 371. [2021-11-20 07:04:06,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 324 states have (on average 1.4012345679012346) internal successors, (454), 348 states have internal predecessors, (454), 12 states have call successors, (12), 10 states have call predecessors, (12), 17 states have return successors, (35), 12 states have call predecessors, (35), 12 states have call successors, (35) [2021-11-20 07:04:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 501 transitions. [2021-11-20 07:04:06,085 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 501 transitions. Word has length 27 [2021-11-20 07:04:06,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:04:06,086 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 501 transitions. [2021-11-20 07:04:06,086 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 07:04:06,087 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 501 transitions. [2021-11-20 07:04:06,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-20 07:04:06,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:04:06,090 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, 1] [2021-11-20 07:04:06,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:04:06,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:04:06,301 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:04:06,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:04:06,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1031478775, now seen corresponding path program 1 times [2021-11-20 07:04:06,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:04:06,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451181138] [2021-11-20 07:04:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:04:06,304 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:04:06,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:04:06,305 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:04:06,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 07:04:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:04:06,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:04:06,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:06,720 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 07:04:06,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:07,253 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 07:04:07,253 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:04:07,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451181138] [2021-11-20 07:04:07,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451181138] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:04:07,253 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:04:07,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 11 [2021-11-20 07:04:07,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664566360] [2021-11-20 07:04:07,254 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:04:07,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:04:07,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:04:07,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:04:07,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:04:07,255 INFO L87 Difference]: Start difference. First operand 371 states and 501 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 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 07:04:07,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:04:07,641 INFO L93 Difference]: Finished difference Result 421 states and 548 transitions. [2021-11-20 07:04:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:04:07,642 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 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 28 [2021-11-20 07:04:07,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:04:07,659 INFO L225 Difference]: With dead ends: 421 [2021-11-20 07:04:07,659 INFO L226 Difference]: Without dead ends: 421 [2021-11-20 07:04:07,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:04:07,660 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 110 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:04:07,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 289 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:04:07,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-11-20 07:04:07,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 362. [2021-11-20 07:04:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 316 states have (on average 1.3639240506329113) internal successors, (431), 339 states have internal predecessors, (431), 12 states have call successors, (12), 10 states have call predecessors, (12), 16 states have return successors, (34), 12 states have call predecessors, (34), 12 states have call successors, (34) [2021-11-20 07:04:07,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 477 transitions. [2021-11-20 07:04:07,677 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 477 transitions. Word has length 28 [2021-11-20 07:04:07,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:04:07,678 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 477 transitions. [2021-11-20 07:04:07,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 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 07:04:07,678 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 477 transitions. [2021-11-20 07:04:07,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-20 07:04:07,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:04:07,680 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 07:04:07,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:04:07,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:04:07,891 INFO L402 AbstractCegarLoop]: === Iteration 17 === 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 07:04:07,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:04:07,892 INFO L85 PathProgramCache]: Analyzing trace with hash -253201523, now seen corresponding path program 1 times [2021-11-20 07:04:07,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:04:07,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1919657168] [2021-11-20 07:04:07,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:04:07,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:04:07,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:04:07,894 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:04:07,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 07:04:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:04:07,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:04:07,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:08,187 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 07:04:08,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:08,484 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 07:04:08,484 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:04:08,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1919657168] [2021-11-20 07:04:08,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1919657168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:04:08,484 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:04:08,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-20 07:04:08,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597821867] [2021-11-20 07:04:08,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:08,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:04:08,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:04:08,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:04:08,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:04:08,486 INFO L87 Difference]: Start difference. First operand 362 states and 477 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, (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 07:04:09,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:04:09,014 INFO L93 Difference]: Finished difference Result 487 states and 604 transitions. [2021-11-20 07:04:09,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:04:09,015 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, (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 30 [2021-11-20 07:04:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:04:09,018 INFO L225 Difference]: With dead ends: 487 [2021-11-20 07:04:09,018 INFO L226 Difference]: Without dead ends: 487 [2021-11-20 07:04:09,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 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 07:04:09,019 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 336 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:04:09,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 254 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:04:09,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2021-11-20 07:04:09,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 431. [2021-11-20 07:04:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 382 states have (on average 1.3481675392670156) internal successors, (515), 407 states have internal predecessors, (515), 12 states have call successors, (12), 11 states have call predecessors, (12), 19 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2021-11-20 07:04:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 560 transitions. [2021-11-20 07:04:09,036 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 560 transitions. Word has length 30 [2021-11-20 07:04:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:04:09,037 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 560 transitions. [2021-11-20 07:04:09,037 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, (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 07:04:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 560 transitions. [2021-11-20 07:04:09,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-20 07:04:09,038 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:04:09,038 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 07:04:09,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:04:09,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:04:09,248 INFO L402 AbstractCegarLoop]: === Iteration 18 === 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 07:04:09,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:04:09,248 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2021-11-20 07:04:09,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:04:09,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18816220] [2021-11-20 07:04:09,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:04:09,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:04:09,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:04:09,250 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:04:09,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 07:04:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:04:09,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:04:09,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:09,557 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 07:04:09,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:09,870 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 07:04:09,870 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:04:09,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18816220] [2021-11-20 07:04:09,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18816220] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:04:09,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:04:09,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-20 07:04:09,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364378662] [2021-11-20 07:04:09,871 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:09,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:04:09,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:04:09,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:04:09,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:04:09,872 INFO L87 Difference]: Start difference. First operand 431 states and 560 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, (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 07:04:10,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:04:10,513 INFO L93 Difference]: Finished difference Result 518 states and 636 transitions. [2021-11-20 07:04:10,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:04:10,514 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, (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 31 [2021-11-20 07:04:10,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:04:10,517 INFO L225 Difference]: With dead ends: 518 [2021-11-20 07:04:10,517 INFO L226 Difference]: Without dead ends: 518 [2021-11-20 07:04:10,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:04:10,519 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 474 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:04:10,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 301 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:04:10,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-11-20 07:04:10,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 490. [2021-11-20 07:04:10,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 437 states have (on average 1.3432494279176201) internal successors, (587), 465 states have internal predecessors, (587), 12 states have call successors, (12), 12 states have call predecessors, (12), 23 states have return successors, (33), 12 states have call predecessors, (33), 12 states have call successors, (33) [2021-11-20 07:04:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 632 transitions. [2021-11-20 07:04:10,535 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 632 transitions. Word has length 31 [2021-11-20 07:04:10,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:04:10,535 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 632 transitions. [2021-11-20 07:04:10,536 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, (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 07:04:10,536 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 632 transitions. [2021-11-20 07:04:10,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-20 07:04:10,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:04:10,537 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 07:04:10,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:04:10,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:04:10,748 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:04:10,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:04:10,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1377524307, now seen corresponding path program 1 times [2021-11-20 07:04:10,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:04:10,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1338741087] [2021-11-20 07:04:10,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:04:10,749 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:04:10,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:04:10,750 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:04:10,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-20 07:04:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:04:10,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:04:10,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:11,393 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:04:11,393 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 07:04:11,401 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:04:11,401 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 07:04:11,736 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 07:04:11,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:30,274 WARN L227 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:04:31,652 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 07:04:31,652 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:04:31,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1338741087] [2021-11-20 07:04:31,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1338741087] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:04:31,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:04:31,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-11-20 07:04:31,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453083798] [2021-11-20 07:04:31,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:31,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:04:31,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:04:31,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:04:31,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=94, Unknown=3, NotChecked=0, Total=132 [2021-11-20 07:04:31,655 INFO L87 Difference]: Start difference. First operand 490 states and 632 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 07:04:32,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:04:32,527 INFO L93 Difference]: Finished difference Result 584 states and 729 transitions. [2021-11-20 07:04:32,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:04:32,529 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 07:04:32,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:04:32,532 INFO L225 Difference]: With dead ends: 584 [2021-11-20 07:04:32,532 INFO L226 Difference]: Without dead ends: 584 [2021-11-20 07:04:32,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=56, Invalid=151, Unknown=3, NotChecked=0, Total=210 [2021-11-20 07:04:32,533 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 153 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:04:32,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 421 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 317 Unchecked, 0.5s Time] [2021-11-20 07:04:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-11-20 07:04:32,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 539. [2021-11-20 07:04:32,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 482 states have (on average 1.3485477178423237) internal successors, (650), 512 states have internal predecessors, (650), 13 states have call successors, (13), 13 states have call predecessors, (13), 26 states have return successors, (37), 13 states have call predecessors, (37), 13 states have call successors, (37) [2021-11-20 07:04:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 700 transitions. [2021-11-20 07:04:32,551 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 700 transitions. Word has length 33 [2021-11-20 07:04:32,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:04:32,551 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 700 transitions. [2021-11-20 07:04:32,552 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 07:04:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 700 transitions. [2021-11-20 07:04:32,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 07:04:32,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:04:32,553 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 07:04:32,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:04:32,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:04:32,765 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 07:04:32,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:04:32,765 INFO L85 PathProgramCache]: Analyzing trace with hash 952776277, now seen corresponding path program 1 times [2021-11-20 07:04:32,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:04:32,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296312921] [2021-11-20 07:04:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:04:32,766 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:04:32,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:04:32,767 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:04:32,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-20 07:04:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:04:32,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 07:04:32,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:33,335 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:04:33,336 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 07:04:33,343 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:04:33,344 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 07:04:33,715 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 07:04:33,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:50,068 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 07:04:50,068 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:04:50,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [296312921] [2021-11-20 07:04:50,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [296312921] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:04:50,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:04:50,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-11-20 07:04:50,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682876650] [2021-11-20 07:04:50,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:50,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:04:50,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:04:50,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:04:50,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=134, Unknown=4, NotChecked=0, Total=182 [2021-11-20 07:04:50,070 INFO L87 Difference]: Start difference. First operand 539 states and 700 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 07:04:52,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:04:52,115 INFO L93 Difference]: Finished difference Result 588 states and 741 transitions. [2021-11-20 07:04:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:04:52,116 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 07:04:52,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:04:52,120 INFO L225 Difference]: With dead ends: 588 [2021-11-20 07:04:52,120 INFO L226 Difference]: Without dead ends: 588 [2021-11-20 07:04:52,121 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=115, Invalid=301, Unknown=4, NotChecked=0, Total=420 [2021-11-20 07:04:52,121 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 209 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:04:52,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 419 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 99 Invalid, 0 Unknown, 167 Unchecked, 0.8s Time] [2021-11-20 07:04:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 588 states. [2021-11-20 07:04:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 588 to 556. [2021-11-20 07:04:52,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 499 states have (on average 1.3366733466933867) internal successors, (667), 529 states have internal predecessors, (667), 13 states have call successors, (13), 13 states have call predecessors, (13), 26 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) [2021-11-20 07:04:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 714 transitions. [2021-11-20 07:04:52,145 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 714 transitions. Word has length 35 [2021-11-20 07:04:52,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:04:52,145 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 714 transitions. [2021-11-20 07:04:52,146 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 07:04:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 714 transitions. [2021-11-20 07:04:52,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-20 07:04:52,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:04:52,147 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 07:04:52,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-20 07:04:52,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:04:52,360 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr9REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:04:52,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:04:52,361 INFO L85 PathProgramCache]: Analyzing trace with hash 950930836, now seen corresponding path program 1 times [2021-11-20 07:04:52,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:04:52,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [380242621] [2021-11-20 07:04:52,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:04:52,361 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:04:52,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:04:52,362 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:04:52,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-20 07:04:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:04:52,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 07:04:52,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:52,654 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 07:04:52,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:52,858 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 36 treesize of output 32 [2021-11-20 07:04:53,778 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 07:04:53,778 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:04:53,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [380242621] [2021-11-20 07:04:53,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [380242621] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:04:53,779 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:04:53,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-11-20 07:04:53,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961090537] [2021-11-20 07:04:53,780 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:04:53,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 07:04:53,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:04:53,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 07:04:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-20 07:04:53,781 INFO L87 Difference]: Start difference. First operand 556 states and 714 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 07:04:54,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:04:54,580 INFO L93 Difference]: Finished difference Result 641 states and 796 transitions. [2021-11-20 07:04:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:04:54,582 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 07:04:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:04:54,585 INFO L225 Difference]: With dead ends: 641 [2021-11-20 07:04:54,585 INFO L226 Difference]: Without dead ends: 641 [2021-11-20 07:04:54,586 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 07:04:54,587 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 152 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:04:54,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 131 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:04:54,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2021-11-20 07:04:54,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 555. [2021-11-20 07:04:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 499 states have (on average 1.3186372745490982) internal successors, (658), 528 states have internal predecessors, (658), 13 states have call successors, (13), 13 states have call predecessors, (13), 26 states have return successors, (34), 13 states have call predecessors, (34), 13 states have call successors, (34) [2021-11-20 07:04:54,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 705 transitions. [2021-11-20 07:04:54,606 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 705 transitions. Word has length 35 [2021-11-20 07:04:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:04:54,607 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 705 transitions. [2021-11-20 07:04:54,607 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 07:04:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 705 transitions. [2021-11-20 07:04:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 07:04:54,608 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:04:54,608 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, 1] [2021-11-20 07:04:54,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-20 07:04:54,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:04:54,820 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:04:54,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:04:54,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1567291088, now seen corresponding path program 1 times [2021-11-20 07:04:54,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:04:54,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713208202] [2021-11-20 07:04:54,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:04:54,821 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:04:54,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:04:54,822 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:04:54,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-20 07:04:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:04:54,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-20 07:04:54,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:55,893 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 11 [2021-11-20 07:04:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:04:55,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:56,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:04:56,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:04:56,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713208202] [2021-11-20 07:04:56,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713208202] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:04:56,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:04:56,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-20 07:04:56,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368598639] [2021-11-20 07:04:56,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:04:56,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:04:56,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:04:56,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:04:56,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:04:56,660 INFO L87 Difference]: Start difference. First operand 555 states and 705 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 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 07:04:57,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:04:57,791 INFO L93 Difference]: Finished difference Result 351 states and 426 transitions. [2021-11-20 07:04:57,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:04:57,793 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 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 36 [2021-11-20 07:04:57,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:04:57,795 INFO L225 Difference]: With dead ends: 351 [2021-11-20 07:04:57,795 INFO L226 Difference]: Without dead ends: 351 [2021-11-20 07:04:57,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:04:57,796 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 261 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:04:57,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 528 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 07:04:57,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-11-20 07:04:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 315. [2021-11-20 07:04:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 278 states have (on average 1.3345323741007193) internal successors, (371), 300 states have internal predecessors, (371), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-20 07:04:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 393 transitions. [2021-11-20 07:04:57,806 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 393 transitions. Word has length 36 [2021-11-20 07:04:57,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:04:57,807 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 393 transitions. [2021-11-20 07:04:57,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 11 states have internal predecessors, (63), 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 07:04:57,807 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 393 transitions. [2021-11-20 07:04:57,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-20 07:04:57,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:04:57,808 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 07:04:57,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-11-20 07:04:58,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:04:58,019 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:04:58,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:04:58,020 INFO L85 PathProgramCache]: Analyzing trace with hash -981900328, now seen corresponding path program 1 times [2021-11-20 07:04:58,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:04:58,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139781521] [2021-11-20 07:04:58,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:04:58,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:04:58,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:04:58,021 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:04:58,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-20 07:04:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:04:58,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:04:58,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:04:58,572 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 07:04:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:04:58,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:04:59,031 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 07:04:59,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:04:59,577 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 07:05:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:05:00,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:05:00,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139781521] [2021-11-20 07:05:00,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139781521] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:05:00,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:05:00,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-11-20 07:05:00,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960052570] [2021-11-20 07:05:00,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:05:00,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:05:00,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:05:00,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:05:00,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:05:00,833 INFO L87 Difference]: Start difference. First operand 315 states and 393 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 15 states have internal predecessors, (65), 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 07:05:02,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:02,648 INFO L93 Difference]: Finished difference Result 399 states and 477 transitions. [2021-11-20 07:05:02,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:05:02,650 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 15 states have internal predecessors, (65), 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 37 [2021-11-20 07:05:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:02,653 INFO L225 Difference]: With dead ends: 399 [2021-11-20 07:05:02,653 INFO L226 Difference]: Without dead ends: 399 [2021-11-20 07:05:02,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-11-20 07:05:02,655 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 259 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:05:02,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 572 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 169 Invalid, 0 Unknown, 108 Unchecked, 0.7s Time] [2021-11-20 07:05:02,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-20 07:05:02,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 353. [2021-11-20 07:05:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 314 states have (on average 1.3280254777070064) internal successors, (417), 336 states have internal predecessors, (417), 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 07:05:02,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 442 transitions. [2021-11-20 07:05:02,674 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 442 transitions. Word has length 37 [2021-11-20 07:05:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:02,675 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 442 transitions. [2021-11-20 07:05:02,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 15 states have internal predecessors, (65), 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 07:05:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 442 transitions. [2021-11-20 07:05:02,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:05:02,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:02,677 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 07:05:02,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-20 07:05:02,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:05:02,905 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:05:02,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:02,906 INFO L85 PathProgramCache]: Analyzing trace with hash -948350694, now seen corresponding path program 1 times [2021-11-20 07:05:02,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:05:02,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485856669] [2021-11-20 07:05:02,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:05:02,907 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:05:02,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:05:02,908 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:05:02,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-20 07:05:03,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:05:03,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 07:05:03,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:05:03,550 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:05:03,550 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 28 treesize of output 30 [2021-11-20 07:05:03,557 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:05:03,557 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 27 treesize of output 23 [2021-11-20 07:05:04,061 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 07:05:04,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:05:09,401 WARN L860 $PredicateComparison]: unable to prove that (or (let ((.cse0 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (and (bvule .cse0 (select |c_#length| |c_~#commands~0.base|)) (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse0))) (exists ((|v_parse_input_c1_~x~0#1.base_31| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_31| (_ bv1 32)) |c_~#commands~0.base|))) (not (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse1)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_31|))))))) is different from true [2021-11-20 07:05:16,360 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 07:05:16,360 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:05:16,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485856669] [2021-11-20 07:05:16,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485856669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:05:16,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:05:16,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-11-20 07:05:16,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123041454] [2021-11-20 07:05:16,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:05:16,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:05:16,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:05:16,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:05:16,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=4, NotChecked=22, Total=182 [2021-11-20 07:05:16,362 INFO L87 Difference]: Start difference. First operand 353 states and 442 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 07:05:17,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:17,677 INFO L93 Difference]: Finished difference Result 364 states and 449 transitions. [2021-11-20 07:05:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:05:17,679 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 07:05:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:17,681 INFO L225 Difference]: With dead ends: 364 [2021-11-20 07:05:17,681 INFO L226 Difference]: Without dead ends: 364 [2021-11-20 07:05:17,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=4, NotChecked=32, Total=342 [2021-11-20 07:05:17,683 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 135 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:05:17,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 341 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 93 Invalid, 0 Unknown, 220 Unchecked, 0.6s Time] [2021-11-20 07:05:17,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-20 07:05:17,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 353. [2021-11-20 07:05:17,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 314 states have (on average 1.3248407643312101) internal successors, (416), 336 states have internal predecessors, (416), 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 07:05:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 441 transitions. [2021-11-20 07:05:17,695 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 441 transitions. Word has length 41 [2021-11-20 07:05:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:17,695 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 441 transitions. [2021-11-20 07:05:17,695 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 07:05:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 441 transitions. [2021-11-20 07:05:17,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:05:17,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:17,697 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 07:05:17,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-20 07:05:17,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:05:17,915 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 07:05:17,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:17,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1419217069, now seen corresponding path program 1 times [2021-11-20 07:05:17,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:05:17,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036173146] [2021-11-20 07:05:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:05:17,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:05:17,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:05:17,917 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:05:17,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-20 07:05:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:05:18,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:05:18,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:05:19,047 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:05:19,048 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 39 treesize of output 41 [2021-11-20 07:05:19,064 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-20 07:05:19,065 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 38 treesize of output 36 [2021-11-20 07:05:19,266 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 07:05:19,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:05:40,020 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 07:05:40,020 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:05:40,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036173146] [2021-11-20 07:05:40,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036173146] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:05:40,021 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:05:40,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 11 [2021-11-20 07:05:40,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199764944] [2021-11-20 07:05:40,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:05:40,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:05:40,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:05:40,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:05:40,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=108, Unknown=6, NotChecked=0, Total=156 [2021-11-20 07:05:40,023 INFO L87 Difference]: Start difference. First operand 353 states and 441 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 07:05:40,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:40,147 INFO L93 Difference]: Finished difference Result 353 states and 440 transitions. [2021-11-20 07:05:40,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 07:05:40,148 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 07:05:40,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:40,151 INFO L225 Difference]: With dead ends: 353 [2021-11-20 07:05:40,151 INFO L226 Difference]: Without dead ends: 353 [2021-11-20 07:05:40,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=42, Invalid=108, Unknown=6, NotChecked=0, Total=156 [2021-11-20 07:05:40,152 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 11 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:05:40,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 242 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2021-11-20 07:05:40,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-20 07:05:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2021-11-20 07:05:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 314 states have (on average 1.321656050955414) internal successors, (415), 336 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 07:05:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 440 transitions. [2021-11-20 07:05:40,164 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 440 transitions. Word has length 48 [2021-11-20 07:05:40,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:40,164 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 440 transitions. [2021-11-20 07:05:40,165 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 07:05:40,165 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 440 transitions. [2021-11-20 07:05:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:05:40,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:40,166 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 07:05:40,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-20 07:05:40,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:05:40,380 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:05:40,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:40,381 INFO L85 PathProgramCache]: Analyzing trace with hash -455995401, now seen corresponding path program 2 times [2021-11-20 07:05:40,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:05:40,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362319207] [2021-11-20 07:05:40,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:05:40,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:05:40,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:05:40,383 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:05:40,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-20 07:05:40,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:05:40,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:05:40,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:05:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:05:40,976 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 07:05:40,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:05:41,273 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 07:05:41,771 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 07:05:42,593 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 07:05:42,593 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:05:42,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362319207] [2021-11-20 07:05:42,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362319207] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:05:42,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:05:42,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2021-11-20 07:05:42,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580230975] [2021-11-20 07:05:42,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:05:42,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:05:42,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:05:42,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:05:42,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:05:42,596 INFO L87 Difference]: Start difference. First operand 353 states and 440 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 07:05:43,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:43,554 INFO L93 Difference]: Finished difference Result 401 states and 480 transitions. [2021-11-20 07:05:43,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:05:43,556 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 07:05:43,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:43,558 INFO L225 Difference]: With dead ends: 401 [2021-11-20 07:05:43,558 INFO L226 Difference]: Without dead ends: 401 [2021-11-20 07:05:43,559 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 07:05:43,559 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 304 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:05:43,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 262 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 07:05:43,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-20 07:05:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 353. [2021-11-20 07:05:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 314 states have (on average 1.302547770700637) internal successors, (409), 336 states have internal predecessors, (409), 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 07:05:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 434 transitions. [2021-11-20 07:05:43,573 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 434 transitions. Word has length 48 [2021-11-20 07:05:43,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:43,573 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 434 transitions. [2021-11-20 07:05:43,574 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 07:05:43,574 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 434 transitions. [2021-11-20 07:05:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:05:43,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:43,575 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 07:05:43,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-20 07:05:43,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:05:43,797 INFO L402 AbstractCegarLoop]: === Iteration 27 === 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 07:05:43,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:43,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2005037539, now seen corresponding path program 1 times [2021-11-20 07:05:43,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:05:43,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683880790] [2021-11-20 07:05:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:05:43,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:05:43,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:05:43,799 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:05:43,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-20 07:05:43,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:05:43,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 07:05:43,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:05:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:05:44,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:05:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:05:44,219 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:05:44,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683880790] [2021-11-20 07:05:44,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683880790] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:05:44,219 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:05:44,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 07:05:44,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584349791] [2021-11-20 07:05:44,220 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:05:44,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:05:44,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:05:44,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:05:44,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:05:44,221 INFO L87 Difference]: Start difference. First operand 353 states and 434 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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 07:05:44,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:44,260 INFO L93 Difference]: Finished difference Result 358 states and 434 transitions. [2021-11-20 07:05:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:05:44,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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 47 [2021-11-20 07:05:44,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:44,262 INFO L225 Difference]: With dead ends: 358 [2021-11-20 07:05:44,262 INFO L226 Difference]: Without dead ends: 358 [2021-11-20 07:05:44,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 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 07:05:44,263 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 42 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:05:44,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 111 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:05:44,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-20 07:05:44,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 351. [2021-11-20 07:05:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 314 states have (on average 1.2802547770700636) internal successors, (402), 334 states have internal predecessors, (402), 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 07:05:44,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 427 transitions. [2021-11-20 07:05:44,275 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 427 transitions. Word has length 47 [2021-11-20 07:05:44,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:44,276 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 427 transitions. [2021-11-20 07:05:44,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 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 07:05:44,276 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 427 transitions. [2021-11-20 07:05:44,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 07:05:44,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:44,277 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 07:05:44,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-20 07:05:44,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:05:44,492 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:05:44,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:44,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2005037283, now seen corresponding path program 1 times [2021-11-20 07:05:44,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:05:44,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965104765] [2021-11-20 07:05:44,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:05:44,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:05:44,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:05:44,495 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:05:44,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-20 07:05:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:05:44,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 07:05:44,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:05:44,740 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 07:05:44,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:05:44,831 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 07:05:44,831 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:05:44,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965104765] [2021-11-20 07:05:44,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965104765] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:05:44,832 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:05:44,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 07:05:44,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576527541] [2021-11-20 07:05:44,832 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:05:44,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 07:05:44,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:05:44,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 07:05:44,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 07:05:44,833 INFO L87 Difference]: Start difference. First operand 351 states and 427 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 07:05:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:44,845 INFO L93 Difference]: Finished difference Result 328 states and 385 transitions. [2021-11-20 07:05:44,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 07:05:44,846 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 07:05:44,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:44,849 INFO L225 Difference]: With dead ends: 328 [2021-11-20 07:05:44,849 INFO L226 Difference]: Without dead ends: 328 [2021-11-20 07:05:44,849 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 07:05:44,850 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 9 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 95 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 07:05:44,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 95 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:05:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-20 07:05:44,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 323. [2021-11-20 07:05:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 291 states have (on average 1.2233676975945018) internal successors, (356), 306 states have internal predecessors, (356), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-20 07:05:44,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 380 transitions. [2021-11-20 07:05:44,921 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 380 transitions. Word has length 47 [2021-11-20 07:05:44,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:44,922 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 380 transitions. [2021-11-20 07:05:44,922 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 07:05:44,922 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 380 transitions. [2021-11-20 07:05:44,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:05:44,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:44,923 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] [2021-11-20 07:05:44,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-20 07:05:45,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:05:45,136 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:05:45,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:45,136 INFO L85 PathProgramCache]: Analyzing trace with hash -120223612, now seen corresponding path program 1 times [2021-11-20 07:05:45,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:05:45,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [206853826] [2021-11-20 07:05:45,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:05:45,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:05:45,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:05:45,139 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:05:45,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-20 07:05:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:05:45,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:05:45,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:05:45,964 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:05:45,965 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 28 treesize of output 30 [2021-11-20 07:05:45,973 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:05:45,973 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 27 treesize of output 23 [2021-11-20 07:05:46,291 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:05:46,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-20 07:05:46,556 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:05:46,556 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 07:05:46,722 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 07:05:46,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:05:47,133 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:05:47,133 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 07:05:49,756 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:05:49,757 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 07:06:15,407 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 07:06:15,408 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:06:15,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [206853826] [2021-11-20 07:06:15,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [206853826] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:06:15,408 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:06:15,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2021-11-20 07:06:15,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142277061] [2021-11-20 07:06:15,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:15,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:06:15,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:06:15,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:06:15,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=204, Unknown=10, NotChecked=0, Total=272 [2021-11-20 07:06:15,411 INFO L87 Difference]: Start difference. First operand 323 states and 380 transitions. Second operand has 17 states, 16 states have (on average 5.375) internal successors, (86), 14 states have internal predecessors, (86), 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 07:06:36,340 WARN L227 SmtUtils]: Spent 12.39s on a formula simplification. DAG size of input: 37 DAG size of output: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:06:39,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:39,636 INFO L93 Difference]: Finished difference Result 339 states and 392 transitions. [2021-11-20 07:06:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:06:39,638 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.375) internal successors, (86), 14 states have internal predecessors, (86), 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 48 [2021-11-20 07:06:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:39,639 INFO L225 Difference]: With dead ends: 339 [2021-11-20 07:06:39,640 INFO L226 Difference]: Without dead ends: 339 [2021-11-20 07:06:39,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=181, Invalid=561, Unknown=14, NotChecked=0, Total=756 [2021-11-20 07:06:39,641 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 431 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:39,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 310 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 101 Invalid, 0 Unknown, 324 Unchecked, 0.7s Time] [2021-11-20 07:06:39,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-20 07:06:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 323. [2021-11-20 07:06:39,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 291 states have (on average 1.2199312714776633) internal successors, (355), 306 states have internal predecessors, (355), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-20 07:06:39,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 379 transitions. [2021-11-20 07:06:39,652 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 379 transitions. Word has length 48 [2021-11-20 07:06:39,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:39,652 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 379 transitions. [2021-11-20 07:06:39,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.375) internal successors, (86), 14 states have internal predecessors, (86), 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 07:06:39,653 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 379 transitions. [2021-11-20 07:06:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 07:06:39,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:39,654 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 07:06:39,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:39,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:06:39,869 INFO L402 AbstractCegarLoop]: === Iteration 30 === 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 07:06:39,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:39,870 INFO L85 PathProgramCache]: Analyzing trace with hash -2026621493, now seen corresponding path program 1 times [2021-11-20 07:06:39,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:06:39,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55561571] [2021-11-20 07:06:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:39,871 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:06:39,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:06:39,871 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:06:39,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-20 07:06:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:39,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:06:39,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:06:40,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:06:40,638 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:06:40,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55561571] [2021-11-20 07:06:40,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55561571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:40,639 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:06:40,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-20 07:06:40,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156217975] [2021-11-20 07:06:40,639 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:40,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 07:06:40,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:06:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 07:06:40,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 07:06:40,641 INFO L87 Difference]: Start difference. First operand 323 states and 379 transitions. Second operand has 7 states, 6 states have (on average 13.0) internal successors, (78), 7 states have internal predecessors, (78), 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 07:06:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:40,930 INFO L93 Difference]: Finished difference Result 334 states and 380 transitions. [2021-11-20 07:06:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 07:06:40,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.0) internal successors, (78), 7 states have internal predecessors, (78), 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 48 [2021-11-20 07:06:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:40,934 INFO L225 Difference]: With dead ends: 334 [2021-11-20 07:06:40,934 INFO L226 Difference]: Without dead ends: 334 [2021-11-20 07:06:40,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 89 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 07:06:40,935 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 55 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:40,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 195 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:06:40,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-20 07:06:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 319. [2021-11-20 07:06:40,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 288 states have (on average 1.1944444444444444) internal successors, (344), 302 states have internal predecessors, (344), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-20 07:06:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 368 transitions. [2021-11-20 07:06:40,945 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 368 transitions. Word has length 48 [2021-11-20 07:06:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:40,945 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 368 transitions. [2021-11-20 07:06:40,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.0) internal successors, (78), 7 states have internal predecessors, (78), 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 07:06:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 368 transitions. [2021-11-20 07:06:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 07:06:40,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:40,947 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 07:06:40,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:41,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:06:41,162 INFO L402 AbstractCegarLoop]: === Iteration 31 === 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 07:06:41,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:41,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1599243231, now seen corresponding path program 1 times [2021-11-20 07:06:41,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:06:41,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578143888] [2021-11-20 07:06:41,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:41,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:06:41,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:06:41,166 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:06:41,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-20 07:06:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:41,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 07:06:41,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:41,333 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 07:06:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:06:41,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:06:41,711 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:06:41,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578143888] [2021-11-20 07:06:41,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578143888] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:06:41,712 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:06:41,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-20 07:06:41,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033532889] [2021-11-20 07:06:41,712 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:06:41,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:06:41,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:06:41,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:06:41,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:06:41,713 INFO L87 Difference]: Start difference. First operand 319 states and 368 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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 07:06:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:41,925 INFO L93 Difference]: Finished difference Result 340 states and 382 transitions. [2021-11-20 07:06:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-20 07:06:41,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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 49 [2021-11-20 07:06:41,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:41,928 INFO L225 Difference]: With dead ends: 340 [2021-11-20 07:06:41,928 INFO L226 Difference]: Without dead ends: 340 [2021-11-20 07:06:41,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 93 SyntacticMatches, 1 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 07:06:41,930 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 20 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:41,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 133 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:06:41,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-11-20 07:06:41,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 323. [2021-11-20 07:06:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 292 states have (on average 1.1815068493150684) internal successors, (345), 306 states have internal predecessors, (345), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-11-20 07:06:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 369 transitions. [2021-11-20 07:06:41,940 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 369 transitions. Word has length 49 [2021-11-20 07:06:41,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:41,940 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 369 transitions. [2021-11-20 07:06:41,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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 07:06:41,941 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 369 transitions. [2021-11-20 07:06:41,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 07:06:41,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:41,942 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] [2021-11-20 07:06:41,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (32)] Ended with exit code 0 [2021-11-20 07:06:42,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:06:42,161 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 07:06:42,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:42,162 INFO L85 PathProgramCache]: Analyzing trace with hash 429224355, now seen corresponding path program 1 times [2021-11-20 07:06:42,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:06:42,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [891648753] [2021-11-20 07:06:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:42,163 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:06:42,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:06:42,164 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:06:42,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-20 07:06:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:06:42,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-20 07:06:42,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:43,255 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:06:43,256 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 07:06:43,269 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:06:43,270 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 07:06:43,839 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-20 07:06:43,839 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 07:06:44,209 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:06:44,210 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 34 [2021-11-20 07:06:44,550 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 07:06:44,560 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 07:06:44,665 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 07:06:44,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:45,146 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-20 07:06:45,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-11-20 07:06:47,931 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:06:47,932 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 37 treesize of output 36 [2021-11-20 07:07:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:07:18,176 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:07:18,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [891648753] [2021-11-20 07:07:18,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [891648753] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:07:18,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:07:18,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2021-11-20 07:07:18,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427800434] [2021-11-20 07:07:18,177 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:07:18,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:07:18,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:07:18,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:07:18,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=415, Unknown=14, NotChecked=0, Total=552 [2021-11-20 07:07:18,179 INFO L87 Difference]: Start difference. First operand 323 states and 369 transitions. Second operand has 24 states, 22 states have (on average 4.090909090909091) internal successors, (90), 19 states have internal predecessors, (90), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:07:26,533 WARN L227 SmtUtils]: Spent 5.33s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:07:43,539 WARN L227 SmtUtils]: Spent 6.23s 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 07:07:58,898 WARN L227 SmtUtils]: Spent 10.90s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:08:18,944 WARN L227 SmtUtils]: Spent 11.97s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:08:42,264 WARN L227 SmtUtils]: Spent 12.98s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:09:00,514 WARN L227 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:09:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:00,527 INFO L93 Difference]: Finished difference Result 375 states and 429 transitions. [2021-11-20 07:09:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 07:09:00,528 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 4.090909090909091) internal successors, (90), 19 states have internal predecessors, (90), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2021-11-20 07:09:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:00,530 INFO L225 Difference]: With dead ends: 375 [2021-11-20 07:09:00,530 INFO L226 Difference]: Without dead ends: 375 [2021-11-20 07:09:00,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 134.7s TimeCoverageRelationStatistics Valid=327, Invalid=1119, Unknown=36, NotChecked=0, Total=1482 [2021-11-20 07:09:00,531 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 107 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:00,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 341 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 193 Unchecked, 0.2s Time] [2021-11-20 07:09:00,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-20 07:09:00,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 358. [2021-11-20 07:09:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 323 states have (on average 1.1795665634674923) internal successors, (381), 339 states have internal predecessors, (381), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-20 07:09:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 412 transitions. [2021-11-20 07:09:00,549 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 412 transitions. Word has length 50 [2021-11-20 07:09:00,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:00,550 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 412 transitions. [2021-11-20 07:09:00,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 4.090909090909091) internal successors, (90), 19 states have internal predecessors, (90), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:09:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 412 transitions. [2021-11-20 07:09:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 07:09:00,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:00,551 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 07:09:00,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:00,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:09:00,763 INFO L402 AbstractCegarLoop]: === Iteration 33 === 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 07:09:00,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:00,763 INFO L85 PathProgramCache]: Analyzing trace with hash 825866446, now seen corresponding path program 1 times [2021-11-20 07:09:00,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:09:00,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001894541] [2021-11-20 07:09:00,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:00,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:09:00,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:09:00,765 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:09:00,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-20 07:09:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:00,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:09:00,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:01,115 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 07:09:01,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:09:01,551 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 07:09:01,551 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:09:01,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001894541] [2021-11-20 07:09:01,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001894541] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:09:01,551 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:09:01,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-11-20 07:09:01,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073667488] [2021-11-20 07:09:01,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:09:01,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:09:01,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:09:01,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:09:01,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:09:01,552 INFO L87 Difference]: Start difference. First operand 358 states and 412 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 07:09:02,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:02,009 INFO L93 Difference]: Finished difference Result 375 states and 421 transitions. [2021-11-20 07:09:02,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:09:02,010 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 07:09:02,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:02,012 INFO L225 Difference]: With dead ends: 375 [2021-11-20 07:09:02,012 INFO L226 Difference]: Without dead ends: 375 [2021-11-20 07:09:02,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:09:02,013 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 249 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:02,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 152 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 07:09:02,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-11-20 07:09:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 358. [2021-11-20 07:09:02,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 323 states have (on average 1.1640866873065014) internal successors, (376), 339 states have internal predecessors, (376), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-20 07:09:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 407 transitions. [2021-11-20 07:09:02,024 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 407 transitions. Word has length 51 [2021-11-20 07:09:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:02,025 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 407 transitions. [2021-11-20 07:09:02,025 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 07:09:02,025 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 407 transitions. [2021-11-20 07:09:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 07:09:02,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:02,026 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 07:09:02,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:02,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:09:02,239 INFO L402 AbstractCegarLoop]: === Iteration 34 === 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 07:09:02,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:02,240 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2021-11-20 07:09:02,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:09:02,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115047159] [2021-11-20 07:09:02,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:02,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:09:02,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:09:02,242 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:09:02,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-20 07:09:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:02,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:09:02,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:02,777 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 07:09:02,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:09:03,244 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 07:09:03,247 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:09:03,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115047159] [2021-11-20 07:09:03,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115047159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:09:03,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:09:03,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2021-11-20 07:09:03,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027195377] [2021-11-20 07:09:03,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:09:03,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:09:03,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:09:03,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:09:03,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:09:03,251 INFO L87 Difference]: Start difference. First operand 358 states and 407 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 07:09:04,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:04,010 INFO L93 Difference]: Finished difference Result 367 states and 410 transitions. [2021-11-20 07:09:04,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:09:04,011 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 07:09:04,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:04,013 INFO L225 Difference]: With dead ends: 367 [2021-11-20 07:09:04,013 INFO L226 Difference]: Without dead ends: 367 [2021-11-20 07:09:04,014 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 07:09:04,014 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 228 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:04,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 204 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 07:09:04,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-20 07:09:04,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 357. [2021-11-20 07:09:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 323 states have (on average 1.1455108359133126) internal successors, (370), 338 states have internal predecessors, (370), 9 states have call successors, (9), 9 states have call predecessors, (9), 17 states have return successors, (22), 9 states have call predecessors, (22), 9 states have call successors, (22) [2021-11-20 07:09:04,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 401 transitions. [2021-11-20 07:09:04,023 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 401 transitions. Word has length 52 [2021-11-20 07:09:04,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:04,024 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 401 transitions. [2021-11-20 07:09:04,024 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 07:09:04,024 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 401 transitions. [2021-11-20 07:09:04,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 07:09:04,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:04,026 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 07:09:04,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:04,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:09:04,238 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:09:04,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:04,238 INFO L85 PathProgramCache]: Analyzing trace with hash 61178226, now seen corresponding path program 1 times [2021-11-20 07:09:04,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:09:04,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [932490537] [2021-11-20 07:09:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:04,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:09:04,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:09:04,240 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:09:04,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-20 07:09:04,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:04,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:09:04,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:05,391 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:09:05,392 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 07:09:05,418 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-20 07:09:05,419 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 07:09:05,784 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 07:09:05,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:09:34,129 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 07:09:34,130 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:09:34,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [932490537] [2021-11-20 07:09:34,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [932490537] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:09:34,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:09:34,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2021-11-20 07:09:34,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7121810] [2021-11-20 07:09:34,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:09:34,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 07:09:34,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:09:34,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 07:09:34,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=92, Unknown=5, NotChecked=0, Total=132 [2021-11-20 07:09:34,132 INFO L87 Difference]: Start difference. First operand 357 states and 401 transitions. Second operand has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 9 states have internal predecessors, (68), 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 07:09:35,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:09:35,164 INFO L93 Difference]: Finished difference Result 386 states and 426 transitions. [2021-11-20 07:09:35,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:09:35,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 9 states have internal predecessors, (68), 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 07:09:35,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:09:35,167 INFO L225 Difference]: With dead ends: 386 [2021-11-20 07:09:35,167 INFO L226 Difference]: Without dead ends: 386 [2021-11-20 07:09:35,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=67, Invalid=168, Unknown=5, NotChecked=0, Total=240 [2021-11-20 07:09:35,168 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 168 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:09:35,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 356 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 108 Invalid, 0 Unknown, 310 Unchecked, 0.6s Time] [2021-11-20 07:09:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-20 07:09:35,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 356. [2021-11-20 07:09:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 323 states have (on average 1.1424148606811146) internal successors, (369), 337 states have internal predecessors, (369), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:09:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 398 transitions. [2021-11-20 07:09:35,177 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 398 transitions. Word has length 54 [2021-11-20 07:09:35,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:09:35,178 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 398 transitions. [2021-11-20 07:09:35,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.181818181818182) internal successors, (68), 9 states have internal predecessors, (68), 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 07:09:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 398 transitions. [2021-11-20 07:09:35,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 07:09:35,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:09:35,179 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] [2021-11-20 07:09:35,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-20 07:09:35,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:09:35,392 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:09:35,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:09:35,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2004614135, now seen corresponding path program 1 times [2021-11-20 07:09:35,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:09:35,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051874835] [2021-11-20 07:09:35,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:09:35,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:09:35,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:09:35,394 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:09:35,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-20 07:09:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:09:35,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:09:35,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:09:36,053 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:09:36,053 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 07:09:36,061 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:09:36,062 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 07:09:36,359 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:09:36,360 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 24 treesize of output 24 [2021-11-20 07:09:36,569 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:09:36,569 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 07:09:36,887 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 07:09:36,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:09:37,560 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:09:37,561 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 07:09:40,061 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:09:40,061 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 27 [2021-11-20 07:10:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 35 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:10:07,734 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:10:07,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051874835] [2021-11-20 07:10:07,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051874835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:10:07,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:10:07,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2021-11-20 07:10:07,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252321686] [2021-11-20 07:10:07,735 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:07,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:10:07,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:10:07,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:10:07,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=204, Unknown=10, NotChecked=0, Total=272 [2021-11-20 07:10:07,737 INFO L87 Difference]: Start difference. First operand 356 states and 398 transitions. Second operand has 17 states, 16 states have (on average 6.125) internal successors, (98), 14 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 07:10:27,375 WARN L227 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:10:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:27,557 INFO L93 Difference]: Finished difference Result 386 states and 422 transitions. [2021-11-20 07:10:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:10:27,558 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 6.125) internal successors, (98), 14 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 54 [2021-11-20 07:10:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:27,560 INFO L225 Difference]: With dead ends: 386 [2021-11-20 07:10:27,560 INFO L226 Difference]: Without dead ends: 386 [2021-11-20 07:10:27,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=144, Invalid=440, Unknown=16, NotChecked=0, Total=600 [2021-11-20 07:10:27,561 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 133 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:27,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 375 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 128 Invalid, 0 Unknown, 215 Unchecked, 0.5s Time] [2021-11-20 07:10:27,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-20 07:10:27,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 356. [2021-11-20 07:10:27,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 323 states have (on average 1.1393188854489165) internal successors, (368), 337 states have internal predecessors, (368), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:10:27,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 397 transitions. [2021-11-20 07:10:27,570 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 397 transitions. Word has length 54 [2021-11-20 07:10:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:27,570 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 397 transitions. [2021-11-20 07:10:27,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 6.125) internal successors, (98), 14 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 07:10:27,570 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 397 transitions. [2021-11-20 07:10:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:10:27,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:27,572 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 07:10:27,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-20 07:10:27,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:10:27,789 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 07:10:27,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1335422540, now seen corresponding path program 3 times [2021-11-20 07:10:27,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:10:27,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636251476] [2021-11-20 07:10:27,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:10:27,791 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:10:27,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:10:27,791 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:10:27,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-20 07:10:27,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:10:27,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:10:27,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:10:27,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:28,679 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:10:28,679 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 07:10:28,684 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:10:28,684 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 07:10:29,014 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 07:10:29,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:46,922 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 07:10:46,922 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:10:46,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636251476] [2021-11-20 07:10:46,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636251476] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:10:46,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:10:46,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-11-20 07:10:46,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008028732] [2021-11-20 07:10:46,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:10:46,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:10:46,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:10:46,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:10:46,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=135, Unknown=3, NotChecked=0, Total=182 [2021-11-20 07:10:46,924 INFO L87 Difference]: Start difference. First operand 356 states and 397 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 07:10:47,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:10:47,467 INFO L93 Difference]: Finished difference Result 369 states and 411 transitions. [2021-11-20 07:10:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:10:47,469 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 07:10:47,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:10:47,471 INFO L225 Difference]: With dead ends: 369 [2021-11-20 07:10:47,472 INFO L226 Difference]: Without dead ends: 369 [2021-11-20 07:10:47,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=49, Invalid=158, Unknown=3, NotChecked=0, Total=210 [2021-11-20 07:10:47,473 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 51 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:10:47,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 227 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 122 Unchecked, 0.4s Time] [2021-11-20 07:10:47,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-20 07:10:47,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 359. [2021-11-20 07:10:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 326 states have (on average 1.138036809815951) internal successors, (371), 340 states have internal predecessors, (371), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:10:47,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 400 transitions. [2021-11-20 07:10:47,483 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 400 transitions. Word has length 56 [2021-11-20 07:10:47,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:10:47,484 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 400 transitions. [2021-11-20 07:10:47,484 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 07:10:47,484 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 400 transitions. [2021-11-20 07:10:47,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 07:10:47,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:10:47,486 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 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] [2021-11-20 07:10:47,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-20 07:10:47,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:10:47,699 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 07:10:47,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:10:47,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2007976587, now seen corresponding path program 1 times [2021-11-20 07:10:47,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:10:47,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283296795] [2021-11-20 07:10:47,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:10:47,700 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:10:47,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:10:47,701 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:10:47,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-20 07:10:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:10:47,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 07:10:47,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:10:48,328 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:10:48,328 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 07:10:48,334 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:10:48,335 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 07:10:48,611 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-20 07:10:48,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-20 07:10:48,881 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 07:10:48,882 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 07:10:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:10:49,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:10:50,322 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:10:50,322 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 38 treesize of output 37 [2021-11-20 07:10:53,024 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-20 07:10:53,024 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 27 [2021-11-20 07:11:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 39 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:11:20,901 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:11:20,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283296795] [2021-11-20 07:11:20,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283296795] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:11:20,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:11:20,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2021-11-20 07:11:20,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668355737] [2021-11-20 07:11:20,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:11:20,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:11:20,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:11:20,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:11:20,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=262, Unknown=12, NotChecked=0, Total=342 [2021-11-20 07:11:20,903 INFO L87 Difference]: Start difference. First operand 359 states and 400 transitions. Second operand has 19 states, 18 states have (on average 5.666666666666667) internal successors, (102), 16 states have internal predecessors, (102), 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 07:11:37,458 WARN L227 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 31 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:11:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:44,992 INFO L93 Difference]: Finished difference Result 377 states and 415 transitions. [2021-11-20 07:11:44,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 07:11:44,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 5.666666666666667) internal successors, (102), 16 states have internal predecessors, (102), 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 56 [2021-11-20 07:11:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:44,995 INFO L225 Difference]: With dead ends: 377 [2021-11-20 07:11:44,995 INFO L226 Difference]: Without dead ends: 377 [2021-11-20 07:11:44,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 52.5s TimeCoverageRelationStatistics Valid=125, Invalid=506, Unknown=19, NotChecked=0, Total=650 [2021-11-20 07:11:44,996 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 132 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:44,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 375 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 270 Unchecked, 0.5s Time] [2021-11-20 07:11:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-20 07:11:45,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 359. [2021-11-20 07:11:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 326 states have (on average 1.1349693251533743) internal successors, (370), 340 states have internal predecessors, (370), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:11:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 399 transitions. [2021-11-20 07:11:45,004 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 399 transitions. Word has length 56 [2021-11-20 07:11:45,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:45,005 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 399 transitions. [2021-11-20 07:11:45,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 5.666666666666667) internal successors, (102), 16 states have internal predecessors, (102), 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 07:11:45,005 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 399 transitions. [2021-11-20 07:11:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 07:11:45,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:45,006 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:45,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-20 07:11:45,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:11:45,219 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:11:45,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:45,219 INFO L85 PathProgramCache]: Analyzing trace with hash -170351524, now seen corresponding path program 1 times [2021-11-20 07:11:45,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:11:45,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433832709] [2021-11-20 07:11:45,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:45,220 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:11:45,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:11:45,220 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:11:45,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2021-11-20 07:11:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:45,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-20 07:11:45,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:11:45,645 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-20 07:11:45,646 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 4 case distinctions, treesize of input 34 treesize of output 51 [2021-11-20 07:11:46,254 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-11-20 07:11:46,254 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 6 case distinctions, treesize of input 75 treesize of output 82 [2021-11-20 07:11:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:11:46,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:11:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:11:47,703 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:11:47,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433832709] [2021-11-20 07:11:47,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433832709] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:11:47,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:11:47,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2021-11-20 07:11:47,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476147140] [2021-11-20 07:11:47,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:11:47,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:11:47,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:11:47,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:11:47,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:11:47,705 INFO L87 Difference]: Start difference. First operand 359 states and 399 transitions. Second operand has 19 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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 07:11:54,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:54,985 INFO L93 Difference]: Finished difference Result 391 states and 428 transitions. [2021-11-20 07:11:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:11:54,985 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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 57 [2021-11-20 07:11:54,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:54,987 INFO L225 Difference]: With dead ends: 391 [2021-11-20 07:11:54,987 INFO L226 Difference]: Without dead ends: 391 [2021-11-20 07:11:54,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 97 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=219, Invalid=709, Unknown=2, NotChecked=0, Total=930 [2021-11-20 07:11:54,989 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 339 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:54,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 417 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 236 Invalid, 0 Unknown, 220 Unchecked, 0.5s Time] [2021-11-20 07:11:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-20 07:11:54,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 358. [2021-11-20 07:11:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 326 states have (on average 1.1319018404907975) internal successors, (369), 339 states have internal predecessors, (369), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:11:54,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 398 transitions. [2021-11-20 07:11:54,997 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 398 transitions. Word has length 57 [2021-11-20 07:11:54,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:54,997 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 398 transitions. [2021-11-20 07:11:54,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 6.375) internal successors, (102), 16 states have internal predecessors, (102), 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 07:11:54,998 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 398 transitions. [2021-11-20 07:11:54,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:11:54,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:54,999 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 07:11:55,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2021-11-20 07:11:55,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:11:55,223 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:11:55,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:55,224 INFO L85 PathProgramCache]: Analyzing trace with hash -917707913, now seen corresponding path program 1 times [2021-11-20 07:11:55,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:11:55,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018765722] [2021-11-20 07:11:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:55,225 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:11:55,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:11:55,226 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:11:55,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-20 07:11:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-20 07:11:55,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:11:55,843 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 07:11:55,903 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 07:11:55,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:11:56,212 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 07:11:56,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:11:56,707 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 07:11:58,067 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 07:11:58,067 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:11:58,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018765722] [2021-11-20 07:11:58,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018765722] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:11:58,068 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:11:58,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-11-20 07:11:58,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417173759] [2021-11-20 07:11:58,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:11:58,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:11:58,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:11:58,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:11:58,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:11:58,070 INFO L87 Difference]: Start difference. First operand 358 states and 398 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 07:11:59,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:11:59,278 INFO L93 Difference]: Finished difference Result 392 states and 428 transitions. [2021-11-20 07:11:59,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:11:59,279 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 07:11:59,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:11:59,281 INFO L225 Difference]: With dead ends: 392 [2021-11-20 07:11:59,281 INFO L226 Difference]: Without dead ends: 392 [2021-11-20 07:11:59,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2021-11-20 07:11:59,281 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 187 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:11:59,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 443 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 157 Invalid, 0 Unknown, 164 Unchecked, 0.3s Time] [2021-11-20 07:11:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-20 07:11:59,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 354. [2021-11-20 07:11:59,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 323 states have (on average 1.1238390092879258) internal successors, (363), 335 states have internal predecessors, (363), 9 states have call successors, (9), 9 states have call predecessors, (9), 16 states have return successors, (20), 9 states have call predecessors, (20), 9 states have call successors, (20) [2021-11-20 07:11:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 392 transitions. [2021-11-20 07:11:59,291 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 392 transitions. Word has length 58 [2021-11-20 07:11:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:11:59,291 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 392 transitions. [2021-11-20 07:11:59,291 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 07:11:59,292 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 392 transitions. [2021-11-20 07:11:59,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:11:59,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:11:59,293 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:11:59,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-20 07:11:59,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:11:59,504 INFO L402 AbstractCegarLoop]: === Iteration 41 === 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 07:11:59,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:11:59,504 INFO L85 PathProgramCache]: Analyzing trace with hash -985929967, now seen corresponding path program 1 times [2021-11-20 07:11:59,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:11:59,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [243350627] [2021-11-20 07:11:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:11:59,505 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:11:59,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:11:59,506 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:11:59,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-20 07:11:59,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:11:59,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-20 07:11:59,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:12:00,038 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 07:12:00,039 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 23 treesize of output 30 [2021-11-20 07:12:00,922 INFO L354 Elim1Store]: treesize reduction 36, result has 25.0 percent of original size [2021-11-20 07:12:00,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 42 [2021-11-20 07:12:01,140 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 26 treesize of output 14 [2021-11-20 07:12:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:12:01,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:12:03,119 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:12:03,120 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:12:03,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [243350627] [2021-11-20 07:12:03,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [243350627] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:12:03,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:12:03,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 25 [2021-11-20 07:12:03,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552020030] [2021-11-20 07:12:03,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:12:03,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 07:12:03,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:12:03,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 07:12:03,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-11-20 07:12:03,121 INFO L87 Difference]: Start difference. First operand 354 states and 392 transitions. Second operand has 27 states, 24 states have (on average 4.166666666666667) internal successors, (100), 21 states have internal predecessors, (100), 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 07:13:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:17,174 INFO L93 Difference]: Finished difference Result 405 states and 433 transitions. [2021-11-20 07:13:17,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-20 07:13:17,174 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 4.166666666666667) internal successors, (100), 21 states have internal predecessors, (100), 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 58 [2021-11-20 07:13:17,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:17,176 INFO L225 Difference]: With dead ends: 405 [2021-11-20 07:13:17,176 INFO L226 Difference]: Without dead ends: 405 [2021-11-20 07:13:17,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 99 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 74.0s TimeCoverageRelationStatistics Valid=691, Invalid=2478, Unknown=23, NotChecked=0, Total=3192 [2021-11-20 07:13:17,178 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 572 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:17,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 409 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 573 Invalid, 0 Unknown, 223 Unchecked, 1.3s Time] [2021-11-20 07:13:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-11-20 07:13:17,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 317. [2021-11-20 07:13:17,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 289 states have (on average 1.1176470588235294) internal successors, (323), 300 states have internal predecessors, (323), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-20 07:13:17,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 346 transitions. [2021-11-20 07:13:17,186 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 346 transitions. Word has length 58 [2021-11-20 07:13:17,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:17,187 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 346 transitions. [2021-11-20 07:13:17,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 4.166666666666667) internal successors, (100), 21 states have internal predecessors, (100), 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 07:13:17,187 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 346 transitions. [2021-11-20 07:13:17,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:13:17,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:17,188 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] [2021-11-20 07:13:17,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:17,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:13:17,401 INFO L402 AbstractCegarLoop]: === Iteration 42 === 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 07:13:17,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:17,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1720254908, now seen corresponding path program 1 times [2021-11-20 07:13:17,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:13:17,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926364916] [2021-11-20 07:13:17,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:13:17,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:13:17,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:13:17,403 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:13:17,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-20 07:13:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:13:17,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:13:17,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:18,322 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:13:18,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:13:19,516 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:13:19,517 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:13:19,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926364916] [2021-11-20 07:13:19,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926364916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:13:19,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:13:19,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-11-20 07:13:19,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601723360] [2021-11-20 07:13:19,517 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:13:19,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 07:13:19,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:13:19,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 07:13:19,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:13:19,519 INFO L87 Difference]: Start difference. First operand 317 states and 346 transitions. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:13:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:13:20,044 INFO L93 Difference]: Finished difference Result 299 states and 319 transitions. [2021-11-20 07:13:20,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:13:20,045 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2021-11-20 07:13:20,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:13:20,046 INFO L225 Difference]: With dead ends: 299 [2021-11-20 07:13:20,046 INFO L226 Difference]: Without dead ends: 299 [2021-11-20 07:13:20,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 104 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 07:13:20,047 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 95 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:13:20,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 245 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 07:13:20,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-20 07:13:20,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 282. [2021-11-20 07:13:20,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 258 states have (on average 1.1007751937984496) internal successors, (284), 267 states have internal predecessors, (284), 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 07:13:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 302 transitions. [2021-11-20 07:13:20,055 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 302 transitions. Word has length 58 [2021-11-20 07:13:20,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:13:20,055 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 302 transitions. [2021-11-20 07:13:20,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 3 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-20 07:13:20,056 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 302 transitions. [2021-11-20 07:13:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 07:13:20,057 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:13:20,057 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] [2021-11-20 07:13:20,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-20 07:13:20,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:13:20,271 INFO L402 AbstractCegarLoop]: === Iteration 43 === 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 07:13:20,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:13:20,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1225182698, now seen corresponding path program 2 times [2021-11-20 07:13:20,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:13:20,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719669890] [2021-11-20 07:13:20,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:13:20,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:13:20,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:13:20,272 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:13:20,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2021-11-20 07:13:20,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:13:20,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:13:20,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-20 07:13:20,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:13:21,065 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:13:21,066 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 07:13:21,074 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:13:21,074 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 07:13:21,636 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-11-20 07:13:21,637 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 07:13:22,558 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 07:13:22,562 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 07:13:22,674 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 07:13:22,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:03,797 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_parse_input_c1_~x~0#1.base_121| (_ BitVec 32)) (|v_parse_input_c1_~x~0#1.base_125| (_ BitVec 32))) (and (not (let ((.cse0 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (bvult (select (select |c_#memory_$Pointer$.offset| |c_~#commands~0.base|) .cse0) (select (store (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_125| (_ bv1 32)) |v_parse_input_c1_~x~0#1.base_121| (_ bv1 32)) (select (select |c_#memory_$Pointer$.base| |c_~#commands~0.base|) .cse0))))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_125|))))) (forall ((|v_parse_input_c1_~x~0#1.base_121| (_ BitVec 32)) (|v_parse_input_c1_~x~0#1.base_126| (_ BitVec 32))) (or (let ((.cse1 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (bvult (select (select |c_#memory_$Pointer$.offset| |c_~#commands~0.base|) .cse1) (select (store (store |c_#length| |v_parse_input_c1_~x~0#1.base_126| (_ bv1 32)) |v_parse_input_c1_~x~0#1.base_121| (_ bv1 32)) (select (select |c_#memory_$Pointer$.base| |c_~#commands~0.base|) .cse1)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_parse_input_c1_~x~0#1.base_126|))))))) is different from true [2021-11-20 07:14:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 15 refuted. 7 times theorem prover too weak. 0 trivial. 25 not checked. [2021-11-20 07:14:04,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:14:04,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719669890] [2021-11-20 07:14:04,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719669890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:14:04,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:14:04,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2021-11-20 07:14:04,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960697979] [2021-11-20 07:14:04,321 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:14:04,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 07:14:04,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:14:04,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 07:14:04,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=308, Unknown=17, NotChecked=38, Total=462 [2021-11-20 07:14:04,322 INFO L87 Difference]: Start difference. First operand 282 states and 302 transitions. Second operand has 22 states, 19 states have (on average 5.578947368421052) internal successors, (106), 17 states have internal predecessors, (106), 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 07:14:21,188 WARN L227 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:14:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:14:39,707 INFO L93 Difference]: Finished difference Result 333 states and 358 transitions. [2021-11-20 07:14:39,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:14:39,708 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 5.578947368421052) internal successors, (106), 17 states have internal predecessors, (106), 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 58 [2021-11-20 07:14:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:14:39,709 INFO L225 Difference]: With dead ends: 333 [2021-11-20 07:14:39,709 INFO L226 Difference]: Without dead ends: 333 [2021-11-20 07:14:39,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 95 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 75.9s TimeCoverageRelationStatistics Valid=197, Invalid=773, Unknown=26, NotChecked=60, Total=1056 [2021-11-20 07:14:39,710 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 116 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:14:39,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 524 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 342 Unchecked, 0.3s Time] [2021-11-20 07:14:39,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-20 07:14:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 238. [2021-11-20 07:14:39,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 218 states have (on average 1.0963302752293578) internal successors, (239), 225 states have internal predecessors, (239), 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 07:14:39,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 254 transitions. [2021-11-20 07:14:39,715 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 254 transitions. Word has length 58 [2021-11-20 07:14:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:14:39,715 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 254 transitions. [2021-11-20 07:14:39,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 5.578947368421052) internal successors, (106), 17 states have internal predecessors, (106), 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 07:14:39,716 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 254 transitions. [2021-11-20 07:14:39,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 07:14:39,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:14:39,717 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:14:39,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2021-11-20 07:14:39,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:14:39,920 INFO L402 AbstractCegarLoop]: === Iteration 44 === 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 07:14:39,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:14:39,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1709075571, now seen corresponding path program 1 times [2021-11-20 07:14:39,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:14:39,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [966422409] [2021-11-20 07:14:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:14:39,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:14:39,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:14:39,921 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:14:39,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-20 07:14:40,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:14:40,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 07:14:40,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:14:40,258 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-20 07:14:40,259 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 26 treesize of output 33 [2021-11-20 07:14:40,602 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-20 07:14:40,602 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 45 treesize of output 48 [2021-11-20 07:14:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:14:41,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:14:43,909 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:14:43,910 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:14:43,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [966422409] [2021-11-20 07:14:43,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [966422409] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:14:43,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:14:43,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-11-20 07:14:43,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80327459] [2021-11-20 07:14:43,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:14:43,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 07:14:43,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:14:43,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 07:14:43,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=294, Unknown=1, NotChecked=0, Total=380 [2021-11-20 07:14:43,911 INFO L87 Difference]: Start difference. First operand 238 states and 254 transitions. Second operand has 20 states, 16 states have (on average 6.0) internal successors, (96), 14 states have internal predecessors, (96), 4 states have call successors, (6), 6 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 07:15:03,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:15:03,327 INFO L93 Difference]: Finished difference Result 300 states and 318 transitions. [2021-11-20 07:15:03,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 07:15:03,327 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 6.0) internal successors, (96), 14 states have internal predecessors, (96), 4 states have call successors, (6), 6 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 07:15:03,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:15:03,328 INFO L225 Difference]: With dead ends: 300 [2021-11-20 07:15:03,328 INFO L226 Difference]: Without dead ends: 300 [2021-11-20 07:15:03,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=286, Invalid=964, Unknown=10, NotChecked=0, Total=1260 [2021-11-20 07:15:03,330 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 248 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:15:03,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 351 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 334 Invalid, 0 Unknown, 216 Unchecked, 0.7s Time] [2021-11-20 07:15:03,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-20 07:15:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 237. [2021-11-20 07:15:03,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 218 states have (on average 1.091743119266055) internal successors, (238), 224 states have internal predecessors, (238), 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 07:15:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 253 transitions. [2021-11-20 07:15:03,335 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 253 transitions. Word has length 60 [2021-11-20 07:15:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:15:03,336 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 253 transitions. [2021-11-20 07:15:03,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 6.0) internal successors, (96), 14 states have internal predecessors, (96), 4 states have call successors, (6), 6 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 07:15:03,336 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 253 transitions. [2021-11-20 07:15:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 07:15:03,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:15:03,337 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 07:15:03,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (45)] Ended with exit code 0 [2021-11-20 07:15:03,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:15:03,551 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-20 07:15:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:15:03,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1338644167, now seen corresponding path program 2 times [2021-11-20 07:15:03,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:15:03,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359433077] [2021-11-20 07:15:03,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:15:03,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:15:03,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:15:03,553 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:15:03,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_108723ba-3a67-43a0-813a-3cf0884fa8ab/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-20 07:15:03,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:15:03,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:15:03,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 07:15:03,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:15:04,586 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-20 07:15:04,587 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 40 treesize of output 42 [2021-11-20 07:15:04,603 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-20 07:15:04,603 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 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-20 07:15:05,228 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 07:15:05,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:15:10,741 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_parse_input_c1_~x~0#1.base_133| (_ BitVec 32))) (and (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_133| (_ bv1 32)) |c_~#commands~0.base|))) (not (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse0)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_133|))))))) (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