./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 20:08:05,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 20:08:05,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 20:08:05,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 20:08:05,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 20:08:05,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 20:08:05,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 20:08:05,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 20:08:05,380 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 20:08:05,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 20:08:05,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 20:08:05,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 20:08:05,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 20:08:05,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 20:08:05,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 20:08:05,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 20:08:05,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 20:08:05,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 20:08:05,398 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 20:08:05,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 20:08:05,403 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 20:08:05,405 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 20:08:05,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 20:08:05,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 20:08:05,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 20:08:05,414 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 20:08:05,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 20:08:05,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 20:08:05,417 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 20:08:05,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 20:08:05,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 20:08:05,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 20:08:05,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 20:08:05,422 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 20:08:05,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 20:08:05,425 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 20:08:05,426 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 20:08:05,426 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 20:08:05,427 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 20:08:05,428 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 20:08:05,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 20:08:05,433 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 20:08:05,480 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 20:08:05,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 20:08:05,482 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 20:08:05,482 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 20:08:05,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 20:08:05,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 20:08:05,487 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 20:08:05,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 20:08:05,487 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 20:08:05,488 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 20:08:05,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 20:08:05,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 20:08:05,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 20:08:05,489 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 20:08:05,489 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 20:08:05,489 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 20:08:05,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 20:08:05,490 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 20:08:05,490 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 20:08:05,490 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 20:08:05,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 20:08:05,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 20:08:05,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 20:08:05,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:08:05,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 20:08:05,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 20:08:05,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 20:08:05,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 20:08:05,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 20:08:05,493 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_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 [2021-10-21 20:08:05,911 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 20:08:05,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 20:08:05,947 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 20:08:05,949 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 20:08:05,951 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 20:08:05,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2021-10-21 20:08:06,052 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/data/f9a548b94/13ee4d5b04864d8c85b02298e5875325/FLAG09db24607 [2021-10-21 20:08:06,690 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 20:08:06,691 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2021-10-21 20:08:06,721 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/data/f9a548b94/13ee4d5b04864d8c85b02298e5875325/FLAG09db24607 [2021-10-21 20:08:06,954 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/data/f9a548b94/13ee4d5b04864d8c85b02298e5875325 [2021-10-21 20:08:06,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 20:08:06,967 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 20:08:06,974 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 20:08:06,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 20:08:06,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 20:08:06,978 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:08:06" (1/1) ... [2021-10-21 20:08:06,981 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66dd9f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:08:06, skipping insertion in model container [2021-10-21 20:08:06,982 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 08:08:06" (1/1) ... [2021-10-21 20:08:06,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 20:08:07,037 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 20:08:07,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:08:07,455 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 20:08:07,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 20:08:07,560 INFO L208 MainTranslator]: Completed translation [2021-10-21 20:08:07,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:08:07 WrapperNode [2021-10-21 20:08:07,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 20:08:07,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 20:08:07,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 20:08:07,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 20:08:07,572 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:08:07" (1/1) ... [2021-10-21 20:08:07,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:08:07" (1/1) ... [2021-10-21 20:08:07,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:08:07" (1/1) ... [2021-10-21 20:08:07,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:08:07" (1/1) ... [2021-10-21 20:08:07,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:08:07" (1/1) ... [2021-10-21 20:08:07,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:08:07" (1/1) ... [2021-10-21 20:08:07,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:08:07" (1/1) ... [2021-10-21 20:08:07,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 20:08:07,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 20:08:07,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 20:08:07,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 20:08:07,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:08:07" (1/1) ... [2021-10-21 20:08:07,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 20:08:07,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:07,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 20:08:07,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 20:08:07,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 20:08:07,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 20:08:07,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 20:08:07,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 20:08:07,724 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 20:08:07,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 20:08:07,725 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 20:08:07,725 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcmp [2021-10-21 20:08:07,725 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 20:08:07,725 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 20:08:07,726 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 20:08:07,729 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 20:08:07,729 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 20:08:07,729 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 20:08:07,729 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 20:08:07,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 20:08:07,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 20:08:07,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 20:08:07,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 20:08:07,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 20:08:07,730 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 20:08:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 20:08:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 20:08:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 20:08:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 20:08:07,731 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 20:08:07,732 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 20:08:07,732 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 20:08:07,732 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 20:08:07,732 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 20:08:07,732 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 20:08:07,732 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 20:08:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 20:08:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 20:08:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 20:08:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 20:08:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 20:08:07,733 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 20:08:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 20:08:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 20:08:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 20:08:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 20:08:07,734 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 20:08:07,735 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 20:08:07,735 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 20:08:07,735 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 20:08:07,735 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 20:08:07,735 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 20:08:07,735 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 20:08:07,736 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 20:08:07,736 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 20:08:07,736 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 20:08:07,736 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 20:08:07,736 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 20:08:07,737 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 20:08:07,737 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 20:08:07,737 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 20:08:07,737 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 20:08:07,737 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 20:08:07,737 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 20:08:07,738 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 20:08:07,738 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 20:08:07,738 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 20:08:07,738 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 20:08:07,738 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 20:08:07,738 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 20:08:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 20:08:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 20:08:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 20:08:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 20:08:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 20:08:07,739 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 20:08:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 20:08:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 20:08:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 20:08:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 20:08:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 20:08:07,740 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 20:08:07,741 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 20:08:07,741 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 20:08:07,741 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 20:08:07,741 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 20:08:07,741 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 20:08:07,742 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 20:08:07,742 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 20:08:07,742 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 20:08:07,742 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 20:08:07,742 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 20:08:07,742 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 20:08:07,743 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 20:08:07,743 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 20:08:07,743 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 20:08:07,743 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 20:08:07,743 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 20:08:07,743 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 20:08:07,744 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 20:08:07,744 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 20:08:07,744 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 20:08:07,744 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 20:08:07,744 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 20:08:07,744 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 20:08:07,745 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 20:08:07,745 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 20:08:07,745 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 20:08:07,745 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 20:08:07,745 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 20:08:07,746 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 20:08:07,746 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 20:08:07,746 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 20:08:07,746 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 20:08:07,746 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 20:08:07,746 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 20:08:07,747 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 20:08:07,747 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 20:08:07,747 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 20:08:07,747 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 20:08:07,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 20:08:07,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-21 20:08:07,748 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcmp [2021-10-21 20:08:07,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 20:08:07,748 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 20:08:07,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 20:08:07,748 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 20:08:07,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 20:08:07,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 20:08:07,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 20:08:08,372 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 20:08:08,372 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-21 20:08:08,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:08:08 BoogieIcfgContainer [2021-10-21 20:08:08,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 20:08:08,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 20:08:08,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 20:08:08,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 20:08:08,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 08:08:06" (1/3) ... [2021-10-21 20:08:08,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1664c978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:08:08, skipping insertion in model container [2021-10-21 20:08:08,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 08:08:07" (2/3) ... [2021-10-21 20:08:08,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1664c978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 08:08:08, skipping insertion in model container [2021-10-21 20:08:08,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:08:08" (3/3) ... [2021-10-21 20:08:08,387 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrcmp-alloca-2.i [2021-10-21 20:08:08,394 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 20:08:08,395 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-10-21 20:08:08,454 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 20:08:08,461 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 20:08:08,461 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-21 20:08:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand has 61 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 54 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:08:08,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 20:08:08,491 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:08,491 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:08,492 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:08,499 INFO L82 PathProgramCache]: Analyzing trace with hash 903973826, now seen corresponding path program 1 times [2021-10-21 20:08:08,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:08,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312392322] [2021-10-21 20:08:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:08,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:08,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:08,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:08,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:08,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312392322] [2021-10-21 20:08:08,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312392322] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:08,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:08,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:08:08,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619546986] [2021-10-21 20:08:08,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:08:08,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:08,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:08:08,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:08:08,805 INFO L87 Difference]: Start difference. First operand has 61 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 54 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:09,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:09,167 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-10-21 20:08:09,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:08:09,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 20:08:09,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:09,182 INFO L225 Difference]: With dead ends: 82 [2021-10-21 20:08:09,182 INFO L226 Difference]: Without dead ends: 78 [2021-10-21 20:08:09,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:08:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-21 20:08:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2021-10-21 20:08:09,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 55 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-10-21 20:08:09,253 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 11 [2021-10-21 20:08:09,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:09,254 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-10-21 20:08:09,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-10-21 20:08:09,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 20:08:09,256 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:09,257 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:09,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 20:08:09,257 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:09,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:09,260 INFO L82 PathProgramCache]: Analyzing trace with hash 905820868, now seen corresponding path program 1 times [2021-10-21 20:08:09,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:09,260 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195470797] [2021-10-21 20:08:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:09,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:09,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:09,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:09,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195470797] [2021-10-21 20:08:09,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195470797] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:09,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:09,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:08:09,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479387954] [2021-10-21 20:08:09,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:08:09,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:09,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:08:09,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:08:09,413 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:09,561 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-10-21 20:08:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:08:09,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 20:08:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:09,570 INFO L225 Difference]: With dead ends: 59 [2021-10-21 20:08:09,570 INFO L226 Difference]: Without dead ends: 59 [2021-10-21 20:08:09,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:08:09,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-21 20:08:09,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-21 20:08:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 53 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-10-21 20:08:09,594 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 11 [2021-10-21 20:08:09,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:09,594 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-10-21 20:08:09,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:09,595 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-10-21 20:08:09,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 20:08:09,596 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:09,596 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:09,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 20:08:09,596 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:09,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:09,597 INFO L82 PathProgramCache]: Analyzing trace with hash 905820869, now seen corresponding path program 1 times [2021-10-21 20:08:09,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:09,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458235478] [2021-10-21 20:08:09,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:09,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:09,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:09,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:09,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458235478] [2021-10-21 20:08:09,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458235478] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:09,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:09,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:08:09,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492243066] [2021-10-21 20:08:09,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:08:09,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:09,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:08:09,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:08:09,813 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:10,041 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-10-21 20:08:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:08:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 20:08:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:10,052 INFO L225 Difference]: With dead ends: 79 [2021-10-21 20:08:10,052 INFO L226 Difference]: Without dead ends: 79 [2021-10-21 20:08:10,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:08:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-21 20:08:10,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-10-21 20:08:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.641025641025641) internal successors, (64), 55 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:10,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-10-21 20:08:10,079 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 11 [2021-10-21 20:08:10,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:10,080 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-10-21 20:08:10,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:10,081 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-10-21 20:08:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 20:08:10,082 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:10,082 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:10,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 20:08:10,083 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:10,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:10,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1135404026, now seen corresponding path program 1 times [2021-10-21 20:08:10,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:10,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601278778] [2021-10-21 20:08:10,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:10,094 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:10,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:10,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:10,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601278778] [2021-10-21 20:08:10,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601278778] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:10,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:10,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:08:10,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752746577] [2021-10-21 20:08:10,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:08:10,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:10,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:08:10,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:08:10,253 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:10,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:10,433 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-10-21 20:08:10,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:08:10,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 20:08:10,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:10,435 INFO L225 Difference]: With dead ends: 60 [2021-10-21 20:08:10,435 INFO L226 Difference]: Without dead ends: 60 [2021-10-21 20:08:10,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:08:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-21 20:08:10,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-21 20:08:10,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 54 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:10,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-10-21 20:08:10,443 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 13 [2021-10-21 20:08:10,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:10,444 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-10-21 20:08:10,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:10,469 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-10-21 20:08:10,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 20:08:10,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:10,471 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:10,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 20:08:10,471 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:10,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:10,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1135404079, now seen corresponding path program 1 times [2021-10-21 20:08:10,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:10,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417168828] [2021-10-21 20:08:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:10,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:10,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:10,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:10,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:10,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417168828] [2021-10-21 20:08:10,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417168828] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:10,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:10,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:08:10,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306041739] [2021-10-21 20:08:10,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:08:10,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:10,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:08:10,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:08:10,596 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:10,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:10,847 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-10-21 20:08:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:08:10,848 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 20:08:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:10,849 INFO L225 Difference]: With dead ends: 73 [2021-10-21 20:08:10,849 INFO L226 Difference]: Without dead ends: 73 [2021-10-21 20:08:10,850 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:08:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-21 20:08:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2021-10-21 20:08:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 56 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-10-21 20:08:10,857 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 13 [2021-10-21 20:08:10,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:10,858 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-10-21 20:08:10,858 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:10,858 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-10-21 20:08:10,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-21 20:08:10,859 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:10,860 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:10,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 20:08:10,860 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:10,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1135404078, now seen corresponding path program 1 times [2021-10-21 20:08:10,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:10,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192405601] [2021-10-21 20:08:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:10,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:10,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:10,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:10,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192405601] [2021-10-21 20:08:10,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192405601] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:10,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:10,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 20:08:10,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924032373] [2021-10-21 20:08:10,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:08:10,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:10,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:08:10,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:08:10,913 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:11,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:11,030 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2021-10-21 20:08:11,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:08:11,031 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-21 20:08:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:11,033 INFO L225 Difference]: With dead ends: 60 [2021-10-21 20:08:11,034 INFO L226 Difference]: Without dead ends: 60 [2021-10-21 20:08:11,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:08:11,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-21 20:08:11,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-21 20:08:11,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 54 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:11,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-10-21 20:08:11,040 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 13 [2021-10-21 20:08:11,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:11,041 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-10-21 20:08:11,041 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), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:11,041 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-10-21 20:08:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-21 20:08:11,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:11,043 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:11,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 20:08:11,043 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr7REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:11,044 INFO L82 PathProgramCache]: Analyzing trace with hash 837786484, now seen corresponding path program 1 times [2021-10-21 20:08:11,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:11,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978153540] [2021-10-21 20:08:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:11,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:11,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:11,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:11,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:11,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978153540] [2021-10-21 20:08:11,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978153540] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:11,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:11,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:08:11,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61828543] [2021-10-21 20:08:11,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:08:11,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:11,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:08:11,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:08:11,120 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:11,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:11,226 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2021-10-21 20:08:11,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 20:08:11,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-10-21 20:08:11,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:11,228 INFO L225 Difference]: With dead ends: 59 [2021-10-21 20:08:11,229 INFO L226 Difference]: Without dead ends: 59 [2021-10-21 20:08:11,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:08:11,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-21 20:08:11,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-21 20:08:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 53 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:11,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2021-10-21 20:08:11,235 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 14 [2021-10-21 20:08:11,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:11,236 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2021-10-21 20:08:11,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:11,236 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2021-10-21 20:08:11,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 20:08:11,237 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:11,238 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:11,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 20:08:11,238 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:11,239 INFO L82 PathProgramCache]: Analyzing trace with hash 930202632, now seen corresponding path program 1 times [2021-10-21 20:08:11,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:11,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546991245] [2021-10-21 20:08:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:11,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:11,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:11,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:11,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546991245] [2021-10-21 20:08:11,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546991245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:11,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120774152] [2021-10-21 20:08:11,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:11,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:11,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:11,346 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:11,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 20:08:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:11,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 20:08:11,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:11,795 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 20:08:11,796 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:08:11,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-21 20:08:11,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:11,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120774152] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:11,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:08:11,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-21 20:08:11,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038633185] [2021-10-21 20:08:11,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 20:08:11,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:11,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 20:08:11,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 20:08:11,976 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:12,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:12,187 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2021-10-21 20:08:12,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:08:12,188 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-21 20:08:12,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:12,189 INFO L225 Difference]: With dead ends: 74 [2021-10-21 20:08:12,189 INFO L226 Difference]: Without dead ends: 74 [2021-10-21 20:08:12,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:08:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-21 20:08:12,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2021-10-21 20:08:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 50 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-10-21 20:08:12,205 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 15 [2021-10-21 20:08:12,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:12,205 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-10-21 20:08:12,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:12,206 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-10-21 20:08:12,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:08:12,208 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:12,208 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:12,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:12,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:12,424 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrcmpErr0REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:12,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:12,425 INFO L82 PathProgramCache]: Analyzing trace with hash 442243660, now seen corresponding path program 1 times [2021-10-21 20:08:12,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:12,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005658565] [2021-10-21 20:08:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:12,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:12,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:12,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:12,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:12,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:12,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005658565] [2021-10-21 20:08:12,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005658565] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:12,603 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:12,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:08:12,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747933050] [2021-10-21 20:08:12,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:08:12,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:12,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:08:12,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:08:12,610 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:12,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:12,846 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-10-21 20:08:12,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:08:12,847 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-21 20:08:12,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:12,848 INFO L225 Difference]: With dead ends: 53 [2021-10-21 20:08:12,848 INFO L226 Difference]: Without dead ends: 53 [2021-10-21 20:08:12,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:08:12,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-21 20:08:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-10-21 20:08:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.435897435897436) internal successors, (56), 47 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-10-21 20:08:12,868 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 17 [2021-10-21 20:08:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:12,868 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-10-21 20:08:12,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:12,869 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-10-21 20:08:12,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:08:12,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:12,871 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:12,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-21 20:08:12,871 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:12,872 INFO L82 PathProgramCache]: Analyzing trace with hash 442243661, now seen corresponding path program 1 times [2021-10-21 20:08:12,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:12,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744270749] [2021-10-21 20:08:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:12,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:13,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:13,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:13,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744270749] [2021-10-21 20:08:13,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744270749] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:13,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:13,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 20:08:13,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344695234] [2021-10-21 20:08:13,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:08:13,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:13,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:08:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:08:13,122 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:13,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:13,480 INFO L93 Difference]: Finished difference Result 72 states and 83 transitions. [2021-10-21 20:08:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:08:13,481 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-21 20:08:13,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:13,483 INFO L225 Difference]: With dead ends: 72 [2021-10-21 20:08:13,483 INFO L226 Difference]: Without dead ends: 72 [2021-10-21 20:08:13,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:08:13,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-21 20:08:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2021-10-21 20:08:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.446808510638298) internal successors, (68), 55 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-10-21 20:08:13,488 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 17 [2021-10-21 20:08:13,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:13,489 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-10-21 20:08:13,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-10-21 20:08:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 20:08:13,490 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:13,490 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:13,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 20:08:13,490 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:13,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:13,491 INFO L82 PathProgramCache]: Analyzing trace with hash 490904818, now seen corresponding path program 1 times [2021-10-21 20:08:13,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:13,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116114794] [2021-10-21 20:08:13,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:13,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:13,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:13,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:13,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:13,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116114794] [2021-10-21 20:08:13,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116114794] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:13,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914779103] [2021-10-21 20:08:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:13,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:13,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:13,601 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:13,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 20:08:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:13,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 20:08:13,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:13,823 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:08:13,824 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:08:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:13,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914779103] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:13,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:08:13,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-21 20:08:13,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933093272] [2021-10-21 20:08:13,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:08:13,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:13,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:08:13,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:08:13,979 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:14,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:14,195 INFO L93 Difference]: Finished difference Result 68 states and 80 transitions. [2021-10-21 20:08:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:08:14,196 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-21 20:08:14,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:14,197 INFO L225 Difference]: With dead ends: 68 [2021-10-21 20:08:14,197 INFO L226 Difference]: Without dead ends: 68 [2021-10-21 20:08:14,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-21 20:08:14,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-21 20:08:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-10-21 20:08:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 52 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-10-21 20:08:14,203 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 17 [2021-10-21 20:08:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:14,203 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-10-21 20:08:14,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:14,204 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-10-21 20:08:14,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:08:14,209 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:14,210 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:14,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:14,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:14,420 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:14,421 INFO L82 PathProgramCache]: Analyzing trace with hash -18493692, now seen corresponding path program 1 times [2021-10-21 20:08:14,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:14,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302899571] [2021-10-21 20:08:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:14,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:14,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:14,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:14,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302899571] [2021-10-21 20:08:14,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302899571] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:14,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:14,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:08:14,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778036594] [2021-10-21 20:08:14,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 20:08:14,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:14,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 20:08:14,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 20:08:14,483 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:14,569 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-10-21 20:08:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:08:14,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 20:08:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:14,571 INFO L225 Difference]: With dead ends: 60 [2021-10-21 20:08:14,571 INFO L226 Difference]: Without dead ends: 60 [2021-10-21 20:08:14,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:08:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-21 20:08:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-21 20:08:14,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 54 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-10-21 20:08:14,576 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 21 [2021-10-21 20:08:14,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:14,579 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-10-21 20:08:14,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:14,579 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-10-21 20:08:14,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:08:14,580 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:14,580 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:14,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 20:08:14,581 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrcmpErr4REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:14,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:14,582 INFO L82 PathProgramCache]: Analyzing trace with hash -18502766, now seen corresponding path program 1 times [2021-10-21 20:08:14,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:14,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13177078] [2021-10-21 20:08:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:14,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:14,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:14,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:14,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13177078] [2021-10-21 20:08:14,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13177078] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:14,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:14,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 20:08:14,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141871389] [2021-10-21 20:08:14,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 20:08:14,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:14,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 20:08:14,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 20:08:14,668 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 6 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:14,800 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2021-10-21 20:08:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 20:08:14,800 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 20:08:14,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:14,802 INFO L225 Difference]: With dead ends: 58 [2021-10-21 20:08:14,802 INFO L226 Difference]: Without dead ends: 58 [2021-10-21 20:08:14,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:08:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-21 20:08:14,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-21 20:08:14,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 52 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:14,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-10-21 20:08:14,807 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 21 [2021-10-21 20:08:14,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:14,810 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-10-21 20:08:14,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:14,810 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-10-21 20:08:14,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 20:08:14,813 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:14,813 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:14,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 20:08:14,814 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:14,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:14,815 INFO L82 PathProgramCache]: Analyzing trace with hash -18502765, now seen corresponding path program 1 times [2021-10-21 20:08:14,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:14,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438342659] [2021-10-21 20:08:14,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:14,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:14,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:14,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:14,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438342659] [2021-10-21 20:08:14,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438342659] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:14,938 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:14,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 20:08:14,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284195881] [2021-10-21 20:08:14,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 20:08:14,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 20:08:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-21 20:08:14,940 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:15,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:15,195 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2021-10-21 20:08:15,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 20:08:15,195 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 20:08:15,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:15,196 INFO L225 Difference]: With dead ends: 65 [2021-10-21 20:08:15,197 INFO L226 Difference]: Without dead ends: 65 [2021-10-21 20:08:15,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-21 20:08:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-21 20:08:15,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2021-10-21 20:08:15,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.3061224489795917) internal successors, (64), 54 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:15,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-10-21 20:08:15,201 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 21 [2021-10-21 20:08:15,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:15,201 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-10-21 20:08:15,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-10-21 20:08:15,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 20:08:15,202 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:15,202 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:15,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 20:08:15,203 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:15,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1460095726, now seen corresponding path program 1 times [2021-10-21 20:08:15,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:15,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184690060] [2021-10-21 20:08:15,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:15,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:15,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:15,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:15,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184690060] [2021-10-21 20:08:15,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184690060] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:15,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:15,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-21 20:08:15,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428983824] [2021-10-21 20:08:15,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 20:08:15,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:15,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 20:08:15,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-10-21 20:08:15,520 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:16,239 INFO L93 Difference]: Finished difference Result 95 states and 107 transitions. [2021-10-21 20:08:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 20:08:16,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-21 20:08:16,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:16,241 INFO L225 Difference]: With dead ends: 95 [2021-10-21 20:08:16,241 INFO L226 Difference]: Without dead ends: 95 [2021-10-21 20:08:16,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 417.7ms TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-10-21 20:08:16,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-21 20:08:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2021-10-21 20:08:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 73 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 20:08:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2021-10-21 20:08:16,248 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 24 [2021-10-21 20:08:16,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:16,248 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2021-10-21 20:08:16,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:16,249 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2021-10-21 20:08:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 20:08:16,250 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:16,250 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:16,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 20:08:16,251 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:16,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:16,251 INFO L82 PathProgramCache]: Analyzing trace with hash -76483473, now seen corresponding path program 1 times [2021-10-21 20:08:16,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:16,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660743681] [2021-10-21 20:08:16,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:16,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:16,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:16,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:08:16,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:16,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660743681] [2021-10-21 20:08:16,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660743681] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:16,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:16,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 20:08:16,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891379936] [2021-10-21 20:08:16,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 20:08:16,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:16,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 20:08:16,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-21 20:08:16,438 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:16,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:16,791 INFO L93 Difference]: Finished difference Result 122 states and 137 transitions. [2021-10-21 20:08:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 20:08:16,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-10-21 20:08:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:16,794 INFO L225 Difference]: With dead ends: 122 [2021-10-21 20:08:16,794 INFO L226 Difference]: Without dead ends: 122 [2021-10-21 20:08:16,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:08:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-21 20:08:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2021-10-21 20:08:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 86 states have (on average 1.2325581395348837) internal successors, (106), 93 states have internal predecessors, (106), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 20:08:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2021-10-21 20:08:16,801 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 28 [2021-10-21 20:08:16,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:16,801 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2021-10-21 20:08:16,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2021-10-21 20:08:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 20:08:16,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:16,803 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:16,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 20:08:16,803 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:16,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:16,804 INFO L82 PathProgramCache]: Analyzing trace with hash 142371245, now seen corresponding path program 1 times [2021-10-21 20:08:16,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:16,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546449603] [2021-10-21 20:08:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:16,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:17,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:17,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:08:17,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:17,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546449603] [2021-10-21 20:08:17,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546449603] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:17,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:17,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-21 20:08:17,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324645840] [2021-10-21 20:08:17,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 20:08:17,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:17,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 20:08:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-21 20:08:17,038 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:17,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:17,416 INFO L93 Difference]: Finished difference Result 147 states and 165 transitions. [2021-10-21 20:08:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 20:08:17,417 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-10-21 20:08:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:17,419 INFO L225 Difference]: With dead ends: 147 [2021-10-21 20:08:17,419 INFO L226 Difference]: Without dead ends: 147 [2021-10-21 20:08:17,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 212.9ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-21 20:08:17,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-21 20:08:17,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 102. [2021-10-21 20:08:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 87 states have (on average 1.2413793103448276) internal successors, (108), 94 states have internal predecessors, (108), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 20:08:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2021-10-21 20:08:17,427 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 28 [2021-10-21 20:08:17,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:17,427 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2021-10-21 20:08:17,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:17,428 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2021-10-21 20:08:17,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 20:08:17,429 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:17,429 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:17,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 20:08:17,429 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:17,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:17,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1893037799, now seen corresponding path program 1 times [2021-10-21 20:08:17,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:17,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399868129] [2021-10-21 20:08:17,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:17,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:17,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:17,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 20:08:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:17,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:17,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:17,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399868129] [2021-10-21 20:08:17,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399868129] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:17,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:17,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-10-21 20:08:17,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907846399] [2021-10-21 20:08:17,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 20:08:17,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:17,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 20:08:17,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:08:17,826 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:18,496 INFO L93 Difference]: Finished difference Result 146 states and 164 transitions. [2021-10-21 20:08:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 20:08:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-10-21 20:08:18,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:18,498 INFO L225 Difference]: With dead ends: 146 [2021-10-21 20:08:18,498 INFO L226 Difference]: Without dead ends: 143 [2021-10-21 20:08:18,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 487.5ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-10-21 20:08:18,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-21 20:08:18,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2021-10-21 20:08:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 98 states have (on average 1.2244897959183674) internal successors, (120), 107 states have internal predecessors, (120), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 2 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-21 20:08:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 132 transitions. [2021-10-21 20:08:18,508 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 132 transitions. Word has length 30 [2021-10-21 20:08:18,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:18,509 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 132 transitions. [2021-10-21 20:08:18,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:18,509 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 132 transitions. [2021-10-21 20:08:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 20:08:18,511 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:18,511 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:18,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-21 20:08:18,512 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:18,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1835779497, now seen corresponding path program 1 times [2021-10-21 20:08:18,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:18,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449904140] [2021-10-21 20:08:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:18,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:18,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:18,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-21 20:08:18,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 20:08:18,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:18,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449904140] [2021-10-21 20:08:18,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449904140] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 20:08:18,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 20:08:18,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 20:08:18,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592356018] [2021-10-21 20:08:18,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 20:08:18,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:18,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 20:08:18,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:08:18,622 INFO L87 Difference]: Start difference. First operand 115 states and 132 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:18,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:18,705 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2021-10-21 20:08:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 20:08:18,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-10-21 20:08:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:18,707 INFO L225 Difference]: With dead ends: 114 [2021-10-21 20:08:18,707 INFO L226 Difference]: Without dead ends: 47 [2021-10-21 20:08:18,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 20:08:18,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-21 20:08:18,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-21 20:08:18,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.236842105263158) internal successors, (47), 42 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-10-21 20:08:18,710 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 30 [2021-10-21 20:08:18,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:18,711 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-10-21 20:08:18,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 20:08:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-10-21 20:08:18,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 20:08:18,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:18,712 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:18,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-21 20:08:18,713 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:18,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:18,713 INFO L82 PathProgramCache]: Analyzing trace with hash 816426698, now seen corresponding path program 1 times [2021-10-21 20:08:18,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:18,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056951917] [2021-10-21 20:08:18,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:18,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:18,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:18,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:18,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:08:18,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:18,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056951917] [2021-10-21 20:08:18,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056951917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:18,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293199229] [2021-10-21 20:08:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:18,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:18,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:18,875 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:18,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 20:08:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:19,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 20:08:19,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:19,132 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 20:08:19,133 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:08:19,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-21 20:08:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:08:19,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293199229] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:19,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:08:19,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-21 20:08:19,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372992838] [2021-10-21 20:08:19,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 20:08:19,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:19,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 20:08:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-21 20:08:19,482 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:19,859 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2021-10-21 20:08:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 20:08:19,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-10-21 20:08:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:19,861 INFO L225 Difference]: With dead ends: 63 [2021-10-21 20:08:19,861 INFO L226 Difference]: Without dead ends: 63 [2021-10-21 20:08:19,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-10-21 20:08:19,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-21 20:08:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-10-21 20:08:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.2553191489361701) internal successors, (59), 51 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-10-21 20:08:19,864 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 32 [2021-10-21 20:08:19,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:19,865 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-10-21 20:08:19,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 12 states have internal predecessors, (47), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:19,865 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-10-21 20:08:19,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 20:08:19,865 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:19,866 INFO L512 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, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:19,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:20,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:20,080 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:20,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:20,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1395308944, now seen corresponding path program 1 times [2021-10-21 20:08:20,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:20,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884452242] [2021-10-21 20:08:20,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:20,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:20,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:08:20,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:20,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884452242] [2021-10-21 20:08:20,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884452242] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:20,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388300924] [2021-10-21 20:08:20,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:20,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:20,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:20,414 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:20,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 20:08:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:20,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 20:08:20,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:08:20,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388300924] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:20,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:08:20,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2021-10-21 20:08:20,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958257277] [2021-10-21 20:08:20,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 20:08:20,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:20,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 20:08:20,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-10-21 20:08:20,923 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 17 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:21,266 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-10-21 20:08:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:08:21,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-10-21 20:08:21,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:21,268 INFO L225 Difference]: With dead ends: 61 [2021-10-21 20:08:21,268 INFO L226 Difference]: Without dead ends: 57 [2021-10-21 20:08:21,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 308.9ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-10-21 20:08:21,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-21 20:08:21,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-10-21 20:08:21,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-10-21 20:08:21,272 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 36 [2021-10-21 20:08:21,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:21,272 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-10-21 20:08:21,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:21,272 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-10-21 20:08:21,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 20:08:21,273 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:21,273 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2021-10-21 20:08:21,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:21,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:21,474 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:21,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:21,474 INFO L82 PathProgramCache]: Analyzing trace with hash 955222517, now seen corresponding path program 2 times [2021-10-21 20:08:21,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:21,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399317891] [2021-10-21 20:08:21,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:21,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:21,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:22,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:08:22,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:22,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399317891] [2021-10-21 20:08:22,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399317891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:22,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69240401] [2021-10-21 20:08:22,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:08:22,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:22,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:22,172 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:22,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 20:08:22,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:08:22,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:08:22,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 20:08:22,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:22,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:08:23,555 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-10-21 20:08:23,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 32 [2021-10-21 20:08:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:08:23,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69240401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:23,651 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:08:23,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2021-10-21 20:08:23,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038604143] [2021-10-21 20:08:23,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-21 20:08:23,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:23,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-21 20:08:23,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-10-21 20:08:23,654 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:25,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:25,786 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2021-10-21 20:08:25,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-21 20:08:25,787 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-10-21 20:08:25,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:25,787 INFO L225 Difference]: With dead ends: 127 [2021-10-21 20:08:25,788 INFO L226 Difference]: Without dead ends: 68 [2021-10-21 20:08:25,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 2187.2ms TimeCoverageRelationStatistics Valid=346, Invalid=2734, Unknown=0, NotChecked=0, Total=3080 [2021-10-21 20:08:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-21 20:08:25,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2021-10-21 20:08:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.169811320754717) internal successors, (62), 57 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:25,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-10-21 20:08:25,794 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 39 [2021-10-21 20:08:25,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:25,795 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-10-21 20:08:25,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.5) internal successors, (65), 24 states have internal predecessors, (65), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-10-21 20:08:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 20:08:25,796 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:25,796 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:25,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:26,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-21 20:08:26,022 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:26,023 INFO L82 PathProgramCache]: Analyzing trace with hash -2015293125, now seen corresponding path program 3 times [2021-10-21 20:08:26,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:26,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524083397] [2021-10-21 20:08:26,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:26,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:26,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:08:26,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:26,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524083397] [2021-10-21 20:08:26,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524083397] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:26,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84435296] [2021-10-21 20:08:26,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:08:26,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:26,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:26,260 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:26,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 20:08:26,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 20:08:26,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:08:26,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-21 20:08:26,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:26,603 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 20:08:26,604 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 20:08:26,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-21 20:08:27,110 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:08:27,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84435296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:27,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:08:27,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-21 20:08:27,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998944309] [2021-10-21 20:08:27,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 20:08:27,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:27,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 20:08:27,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:08:27,115 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 16 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:27,700 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2021-10-21 20:08:27,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 20:08:27,701 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 16 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-10-21 20:08:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:27,702 INFO L225 Difference]: With dead ends: 75 [2021-10-21 20:08:27,702 INFO L226 Difference]: Without dead ends: 75 [2021-10-21 20:08:27,702 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 438.0ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-10-21 20:08:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-21 20:08:27,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-10-21 20:08:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 66 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2021-10-21 20:08:27,706 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 47 [2021-10-21 20:08:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:27,706 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2021-10-21 20:08:27,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.111111111111111) internal successors, (74), 16 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2021-10-21 20:08:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 20:08:27,707 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:27,708 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:27,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:27,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 20:08:27,908 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:27,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:27,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1575388287, now seen corresponding path program 2 times [2021-10-21 20:08:27,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:27,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965356804] [2021-10-21 20:08:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:27,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:28,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:08:28,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:28,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965356804] [2021-10-21 20:08:28,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965356804] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:28,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195359843] [2021-10-21 20:08:28,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:08:28,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:28,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:28,246 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:28,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 20:08:28,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:08:28,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:08:28,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 20:08:28,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:08:28,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195359843] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:28,979 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:08:28,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-10-21 20:08:28,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991643050] [2021-10-21 20:08:28,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 20:08:28,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:28,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 20:08:28,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-10-21 20:08:28,981 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 19 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:29,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:29,433 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2021-10-21 20:08:29,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 20:08:29,434 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-10-21 20:08:29,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:29,435 INFO L225 Difference]: With dead ends: 73 [2021-10-21 20:08:29,435 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 20:08:29,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 338.0ms TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-10-21 20:08:29,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 20:08:29,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-21 20:08:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.15) internal successors, (69), 64 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-10-21 20:08:29,439 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 51 [2021-10-21 20:08:29,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:29,439 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-10-21 20:08:29,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:29,439 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-10-21 20:08:29,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-21 20:08:29,440 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:29,440 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:29,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:29,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:29,641 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:29,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:29,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1284852124, now seen corresponding path program 4 times [2021-10-21 20:08:29,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:29,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17608453] [2021-10-21 20:08:29,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:29,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:29,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:08:29,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:29,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17608453] [2021-10-21 20:08:29,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17608453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:29,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612130875] [2021-10-21 20:08:29,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:08:29,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:29,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:29,956 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:29,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 20:08:30,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:08:30,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:08:30,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-21 20:08:30,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:30,292 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:08:30,293 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:08:30,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-21 20:08:31,394 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-10-21 20:08:31,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 49 treesize of output 41 [2021-10-21 20:08:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 20:08:31,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612130875] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:31,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:08:31,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 31 [2021-10-21 20:08:31,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642610326] [2021-10-21 20:08:31,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-21 20:08:31,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:31,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-21 20:08:31,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-10-21 20:08:31,452 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 31 states, 30 states have (on average 2.9) internal successors, (87), 28 states have internal predecessors, (87), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:33,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:33,852 INFO L93 Difference]: Finished difference Result 167 states and 172 transitions. [2021-10-21 20:08:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-21 20:08:33,852 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.9) internal successors, (87), 28 states have internal predecessors, (87), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-10-21 20:08:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:33,853 INFO L225 Difference]: With dead ends: 167 [2021-10-21 20:08:33,854 INFO L226 Difference]: Without dead ends: 83 [2021-10-21 20:08:33,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 2259.0ms TimeCoverageRelationStatistics Valid=522, Invalid=4308, Unknown=0, NotChecked=0, Total=4830 [2021-10-21 20:08:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-21 20:08:33,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2021-10-21 20:08:33,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 72 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:33,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2021-10-21 20:08:33,860 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 54 [2021-10-21 20:08:33,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:33,860 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2021-10-21 20:08:33,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.9) internal successors, (87), 28 states have internal predecessors, (87), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:33,861 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2021-10-21 20:08:33,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-21 20:08:33,862 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:33,862 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:33,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:34,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:34,076 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:34,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:34,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1240638882, now seen corresponding path program 5 times [2021-10-21 20:08:34,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:34,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212890393] [2021-10-21 20:08:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:34,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:34,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:34,290 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:08:34,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:34,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212890393] [2021-10-21 20:08:34,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212890393] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:34,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964739123] [2021-10-21 20:08:34,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:08:34,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:34,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:34,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:34,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 20:08:34,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-21 20:08:34,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:08:34,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-21 20:08:34,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:08:35,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964739123] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:35,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:08:35,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-10-21 20:08:35,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880669237] [2021-10-21 20:08:35,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 20:08:35,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:35,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 20:08:35,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-21 20:08:35,289 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 17 states have internal predecessors, (81), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:35,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:35,758 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2021-10-21 20:08:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 20:08:35,758 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 17 states have internal predecessors, (81), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-10-21 20:08:35,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:35,759 INFO L225 Difference]: With dead ends: 90 [2021-10-21 20:08:35,759 INFO L226 Difference]: Without dead ends: 90 [2021-10-21 20:08:35,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-10-21 20:08:35,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-21 20:08:35,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-10-21 20:08:35,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.155844155844156) internal successors, (89), 81 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:35,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2021-10-21 20:08:35,763 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 62 [2021-10-21 20:08:35,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:35,764 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2021-10-21 20:08:35,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.2631578947368425) internal successors, (81), 17 states have internal predecessors, (81), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2021-10-21 20:08:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-21 20:08:35,765 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:35,765 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:35,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:35,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:35,980 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:35,981 INFO L82 PathProgramCache]: Analyzing trace with hash -521766108, now seen corresponding path program 3 times [2021-10-21 20:08:35,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:35,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187382670] [2021-10-21 20:08:35,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:35,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:36,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:36,216 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:08:36,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:36,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187382670] [2021-10-21 20:08:36,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187382670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:36,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175742094] [2021-10-21 20:08:36,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:08:36,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:36,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:36,218 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:36,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 20:08:36,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 20:08:36,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:08:36,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 20:08:36,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:36,622 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:08:36,622 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:08:36,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-21 20:08:37,161 INFO L354 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2021-10-21 20:08:37,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 34 treesize of output 51 [2021-10-21 20:08:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-10-21 20:08:37,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175742094] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:37,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:08:37,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-10-21 20:08:37,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065381064] [2021-10-21 20:08:37,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-21 20:08:37,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:37,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-21 20:08:37,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2021-10-21 20:08:37,425 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 24 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:39,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:08:39,530 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2021-10-21 20:08:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-21 20:08:39,531 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-10-21 20:08:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:08:39,532 INFO L225 Difference]: With dead ends: 89 [2021-10-21 20:08:39,532 INFO L226 Difference]: Without dead ends: 82 [2021-10-21 20:08:39,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1777.3ms TimeCoverageRelationStatistics Valid=470, Invalid=2392, Unknown=0, NotChecked=0, Total=2862 [2021-10-21 20:08:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-21 20:08:39,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2021-10-21 20:08:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 73 states have (on average 1.095890410958904) internal successors, (80), 75 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-10-21 20:08:39,537 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 66 [2021-10-21 20:08:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:08:39,537 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-10-21 20:08:39,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 21 states have internal predecessors, (83), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:08:39,538 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-10-21 20:08:39,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-21 20:08:39,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:08:39,539 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:08:39,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 20:08:39,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 20:08:39,752 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:08:39,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:08:39,753 INFO L82 PathProgramCache]: Analyzing trace with hash -447516703, now seen corresponding path program 6 times [2021-10-21 20:08:39,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:08:39,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164655356] [2021-10-21 20:08:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:08:39,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:08:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:40,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:08:40,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:08:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:08:40,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:08:40,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164655356] [2021-10-21 20:08:40,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164655356] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:40,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239239852] [2021-10-21 20:08:40,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:08:40,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:08:40,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:08:40,144 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:08:40,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 20:08:40,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-21 20:08:40,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:08:40,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-21 20:08:40,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:08:40,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:08:41,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:08:41,160 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-21 20:08:41,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-21 20:08:42,380 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-21 20:08:42,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 23 [2021-10-21 20:08:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:08:42,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239239852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:08:42,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:08:42,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 30 [2021-10-21 20:08:42,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169728957] [2021-10-21 20:08:42,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-21 20:08:42,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:08:42,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-21 20:08:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2021-10-21 20:08:42,405 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 30 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 27 states have internal predecessors, (103), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:03,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:03,803 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-10-21 20:09:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 20:09:03,804 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 27 states have internal predecessors, (103), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-10-21 20:09:03,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:03,805 INFO L225 Difference]: With dead ends: 129 [2021-10-21 20:09:03,805 INFO L226 Difference]: Without dead ends: 87 [2021-10-21 20:09:03,806 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 21332.5ms TimeCoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 20:09:03,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-21 20:09:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2021-10-21 20:09:03,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 79 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-10-21 20:09:03,810 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 69 [2021-10-21 20:09:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:03,811 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-10-21 20:09:03,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 27 states have internal predecessors, (103), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-10-21 20:09:03,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-21 20:09:03,812 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:03,813 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:03,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-10-21 20:09:04,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 20:09:04,028 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:09:04,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:04,028 INFO L82 PathProgramCache]: Analyzing trace with hash 831442788, now seen corresponding path program 7 times [2021-10-21 20:09:04,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:04,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420984219] [2021-10-21 20:09:04,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:04,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:04,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:04,359 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:09:04,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:04,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420984219] [2021-10-21 20:09:04,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420984219] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:04,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955201998] [2021-10-21 20:09:04,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:09:04,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:04,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:04,362 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:04,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 20:09:04,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:04,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-21 20:09:04,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:09:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 20:09:05,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955201998] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:05,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:09:05,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-10-21 20:09:05,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527898425] [2021-10-21 20:09:05,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-21 20:09:05,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:09:05,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-21 20:09:05,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-10-21 20:09:05,324 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 24 states, 23 states have (on average 4.173913043478261) internal successors, (96), 21 states have internal predecessors, (96), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:05,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:05,911 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-10-21 20:09:05,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 20:09:05,912 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 4.173913043478261) internal successors, (96), 21 states have internal predecessors, (96), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2021-10-21 20:09:05,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:05,913 INFO L225 Difference]: With dead ends: 93 [2021-10-21 20:09:05,913 INFO L226 Difference]: Without dead ends: 91 [2021-10-21 20:09:05,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-10-21 20:09:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-21 20:09:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-10-21 20:09:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 86 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:05,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2021-10-21 20:09:05,918 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 73 [2021-10-21 20:09:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:05,918 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2021-10-21 20:09:05,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 4.173913043478261) internal successors, (96), 21 states have internal predecessors, (96), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2021-10-21 20:09:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-21 20:09:05,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:05,920 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:05,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 20:09:06,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 20:09:06,132 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:09:06,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:06,133 INFO L82 PathProgramCache]: Analyzing trace with hash -8689637, now seen corresponding path program 8 times [2021-10-21 20:09:06,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:06,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229394042] [2021-10-21 20:09:06,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:06,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:06,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:06,430 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 49 proven. 41 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 20:09:06,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:06,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229394042] [2021-10-21 20:09:06,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229394042] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:06,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894341068] [2021-10-21 20:09:06,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:09:06,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:06,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:06,432 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:06,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 20:09:07,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:09:07,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:09:07,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 20:09:07,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:09:07,244 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:09:07,244 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:09:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 20:09:07,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894341068] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:07,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:09:07,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-10-21 20:09:07,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207145965] [2021-10-21 20:09:07,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 20:09:07,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:09:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 20:09:07,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-10-21 20:09:07,916 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 29 states, 28 states have (on average 4.321428571428571) internal successors, (121), 26 states have internal predecessors, (121), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:08,331 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2021-10-21 20:09:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 20:09:08,332 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.321428571428571) internal successors, (121), 26 states have internal predecessors, (121), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-10-21 20:09:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:08,333 INFO L225 Difference]: With dead ends: 135 [2021-10-21 20:09:08,333 INFO L226 Difference]: Without dead ends: 98 [2021-10-21 20:09:08,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 457.6ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 20:09:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-21 20:09:08,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2021-10-21 20:09:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 88 states have (on average 1.0795454545454546) internal successors, (95), 90 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-10-21 20:09:08,338 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 80 [2021-10-21 20:09:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:08,338 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-10-21 20:09:08,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.321428571428571) internal successors, (121), 26 states have internal predecessors, (121), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-10-21 20:09:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-21 20:09:08,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:08,340 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:08,366 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 20:09:08,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:08,548 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:09:08,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:08,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1792286072, now seen corresponding path program 9 times [2021-10-21 20:09:08,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:08,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528387392] [2021-10-21 20:09:08,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:08,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:08,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:09,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 20:09:09,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:09,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528387392] [2021-10-21 20:09:09,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528387392] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:09,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769781388] [2021-10-21 20:09:09,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:09:09,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:09,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:09,040 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:09,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 20:09:09,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-21 20:09:09,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:09:09,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-21 20:09:09,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:09:09,951 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:09:09,951 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:09:11,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-10-21 20:09:11,220 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-10-21 20:09:11,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2021-10-21 20:09:16,320 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-10-21 20:09:16,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 51 treesize of output 34 [2021-10-21 20:09:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 20:09:16,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769781388] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:16,350 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:09:16,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 34 [2021-10-21 20:09:16,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248120258] [2021-10-21 20:09:16,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-21 20:09:16,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:09:16,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-21 20:09:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1050, Unknown=0, NotChecked=0, Total=1122 [2021-10-21 20:09:16,352 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 34 states, 33 states have (on average 3.787878787878788) internal successors, (125), 31 states have internal predecessors, (125), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:19,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:19,047 INFO L93 Difference]: Finished difference Result 155 states and 160 transitions. [2021-10-21 20:09:19,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 20:09:19,047 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 3.787878787878788) internal successors, (125), 31 states have internal predecessors, (125), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-10-21 20:09:19,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:19,048 INFO L225 Difference]: With dead ends: 155 [2021-10-21 20:09:19,048 INFO L226 Difference]: Without dead ends: 102 [2021-10-21 20:09:19,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2207.7ms TimeCoverageRelationStatistics Valid=192, Invalid=2358, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 20:09:19,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-21 20:09:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-10-21 20:09:19,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 92 states have (on average 1.076086956521739) internal successors, (99), 94 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-10-21 20:09:19,054 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 84 [2021-10-21 20:09:19,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:19,054 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-10-21 20:09:19,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 3.787878787878788) internal successors, (125), 31 states have internal predecessors, (125), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:19,055 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-10-21 20:09:19,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-21 20:09:19,056 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:19,056 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:19,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 20:09:19,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:19,272 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:09:19,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:19,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1345546133, now seen corresponding path program 10 times [2021-10-21 20:09:19,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:19,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227928638] [2021-10-21 20:09:19,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:19,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:19,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:19,609 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-21 20:09:19,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:19,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227928638] [2021-10-21 20:09:19,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227928638] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:19,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846783115] [2021-10-21 20:09:19,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:09:19,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:19,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:19,612 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:19,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 20:09:20,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:09:20,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:09:20,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-21 20:09:20,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:09:20,363 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:09:20,363 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:09:20,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-21 20:09:21,641 INFO L354 Elim1Store]: treesize reduction 28, result has 31.7 percent of original size [2021-10-21 20:09:21,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 49 treesize of output 41 [2021-10-21 20:09:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 67 proven. 36 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-21 20:09:21,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846783115] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:21,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:09:21,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23] total 38 [2021-10-21 20:09:21,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166171747] [2021-10-21 20:09:21,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-21 20:09:21,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:09:21,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-21 20:09:21,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 20:09:21,720 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 38 states, 37 states have (on average 3.675675675675676) internal successors, (136), 35 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:23,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:23,997 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2021-10-21 20:09:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-21 20:09:23,997 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.675675675675676) internal successors, (136), 35 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-10-21 20:09:23,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:23,998 INFO L225 Difference]: With dead ends: 154 [2021-10-21 20:09:23,999 INFO L226 Difference]: Without dead ends: 113 [2021-10-21 20:09:24,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 1989.6ms TimeCoverageRelationStatistics Valid=603, Invalid=4947, Unknown=0, NotChecked=0, Total=5550 [2021-10-21 20:09:24,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-21 20:09:24,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-10-21 20:09:24,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 103 states have (on average 1.0679611650485437) internal successors, (110), 105 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:24,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-10-21 20:09:24,006 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 88 [2021-10-21 20:09:24,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:24,006 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-10-21 20:09:24,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.675675675675676) internal successors, (136), 35 states have internal predecessors, (136), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:24,007 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-10-21 20:09:24,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-21 20:09:24,007 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:24,008 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:24,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 20:09:24,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:24,220 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:09:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash -47887411, now seen corresponding path program 11 times [2021-10-21 20:09:24,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:24,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153181957] [2021-10-21 20:09:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:24,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:24,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 26 proven. 130 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-21 20:09:24,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:24,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153181957] [2021-10-21 20:09:24,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153181957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:24,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624771901] [2021-10-21 20:09:24,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:09:24,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:24,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:24,749 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:24,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 20:09:25,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-21 20:09:25,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:09:25,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-21 20:09:25,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:09:26,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:09:27,492 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-10-21 20:09:27,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 36 [2021-10-21 20:09:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-21 20:09:27,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624771901] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:27,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:09:27,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2021-10-21 20:09:27,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964921611] [2021-10-21 20:09:27,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-21 20:09:27,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:09:27,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-21 20:09:27,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1634, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 20:09:27,572 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 42 states, 41 states have (on average 3.731707317073171) internal successors, (153), 39 states have internal predecessors, (153), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:32,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:32,374 INFO L93 Difference]: Finished difference Result 283 states and 288 transitions. [2021-10-21 20:09:32,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-10-21 20:09:32,374 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.731707317073171) internal successors, (153), 39 states have internal predecessors, (153), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2021-10-21 20:09:32,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:32,375 INFO L225 Difference]: With dead ends: 283 [2021-10-21 20:09:32,375 INFO L226 Difference]: Without dead ends: 124 [2021-10-21 20:09:32,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3582.4ms TimeCoverageRelationStatistics Valid=491, Invalid=7341, Unknown=0, NotChecked=0, Total=7832 [2021-10-21 20:09:32,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-21 20:09:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2021-10-21 20:09:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 111 states have (on average 1.063063063063063) internal successors, (118), 113 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:32,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-10-21 20:09:32,382 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 99 [2021-10-21 20:09:32,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:32,383 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-10-21 20:09:32,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.731707317073171) internal successors, (153), 39 states have internal predecessors, (153), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-10-21 20:09:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-21 20:09:32,384 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:32,385 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:32,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 20:09:32,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:32,600 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:09:32,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:32,600 INFO L82 PathProgramCache]: Analyzing trace with hash 242398739, now seen corresponding path program 12 times [2021-10-21 20:09:32,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:32,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080771945] [2021-10-21 20:09:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:32,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:32,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:32,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:32,980 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 28 proven. 149 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-21 20:09:32,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:32,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080771945] [2021-10-21 20:09:32,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080771945] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:32,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711679748] [2021-10-21 20:09:32,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:09:32,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:32,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:32,988 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:33,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 20:09:34,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-21 20:09:34,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:09:34,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-21 20:09:34,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:09:34,072 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:09:34,073 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:09:34,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:09:35,613 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-21 20:09:35,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711679748] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:35,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:09:35,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-10-21 20:09:35,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223530599] [2021-10-21 20:09:35,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-21 20:09:35,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:09:35,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-21 20:09:35,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 20:09:35,615 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 35 states, 34 states have (on average 4.764705882352941) internal successors, (162), 32 states have internal predecessors, (162), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:36,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:36,882 INFO L93 Difference]: Finished difference Result 127 states and 132 transitions. [2021-10-21 20:09:36,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 20:09:36,883 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.764705882352941) internal successors, (162), 32 states have internal predecessors, (162), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2021-10-21 20:09:36,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:36,884 INFO L225 Difference]: With dead ends: 127 [2021-10-21 20:09:36,884 INFO L226 Difference]: Without dead ends: 125 [2021-10-21 20:09:36,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1182.0ms TimeCoverageRelationStatistics Valid=277, Invalid=2173, Unknown=0, NotChecked=0, Total=2450 [2021-10-21 20:09:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-21 20:09:36,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-10-21 20:09:36,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 118 states have (on average 1.0593220338983051) internal successors, (125), 120 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:36,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2021-10-21 20:09:36,890 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 107 [2021-10-21 20:09:36,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:36,890 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2021-10-21 20:09:36,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.764705882352941) internal successors, (162), 32 states have internal predecessors, (162), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:36,891 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2021-10-21 20:09:36,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-10-21 20:09:36,892 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:36,892 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:36,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 20:09:37,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:37,108 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:09:37,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:37,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1099534708, now seen corresponding path program 13 times [2021-10-21 20:09:37,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:37,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873023994] [2021-10-21 20:09:37,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:37,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:37,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 31 proven. 189 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-21 20:09:37,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:37,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873023994] [2021-10-21 20:09:37,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873023994] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:37,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369909543] [2021-10-21 20:09:37,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:09:37,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:37,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:37,765 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:37,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 20:09:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:38,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-21 20:09:38,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:09:39,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:09:40,813 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-10-21 20:09:40,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 32 [2021-10-21 20:09:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 7 proven. 213 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-21 20:09:40,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369909543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:40,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:09:40,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 46 [2021-10-21 20:09:40,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266543837] [2021-10-21 20:09:40,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-21 20:09:40,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:09:40,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-21 20:09:40,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1974, Unknown=0, NotChecked=0, Total=2070 [2021-10-21 20:09:40,877 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 46 states, 45 states have (on average 3.888888888888889) internal successors, (175), 43 states have internal predecessors, (175), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:46,343 INFO L93 Difference]: Finished difference Result 323 states and 328 transitions. [2021-10-21 20:09:46,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-21 20:09:46,344 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.888888888888889) internal successors, (175), 43 states have internal predecessors, (175), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-10-21 20:09:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:46,345 INFO L225 Difference]: With dead ends: 323 [2021-10-21 20:09:46,345 INFO L226 Difference]: Without dead ends: 139 [2021-10-21 20:09:46,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1497 ImplicationChecksByTransitivity, 4081.1ms TimeCoverageRelationStatistics Valid=529, Invalid=8783, Unknown=0, NotChecked=0, Total=9312 [2021-10-21 20:09:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-21 20:09:46,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 133. [2021-10-21 20:09:46,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 126 states have (on average 1.0555555555555556) internal successors, (133), 128 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2021-10-21 20:09:46,354 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 114 [2021-10-21 20:09:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:46,354 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2021-10-21 20:09:46,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.888888888888889) internal successors, (175), 43 states have internal predecessors, (175), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2021-10-21 20:09:46,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-21 20:09:46,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:46,356 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:46,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 20:09:46,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-21 20:09:46,580 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:09:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash -972370042, now seen corresponding path program 14 times [2021-10-21 20:09:46,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:46,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961044856] [2021-10-21 20:09:46,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:46,581 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:47,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 45 proven. 200 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-21 20:09:47,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:47,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961044856] [2021-10-21 20:09:47,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961044856] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:47,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591631333] [2021-10-21 20:09:47,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:09:47,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:47,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:47,030 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:47,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 20:09:48,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:09:48,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:09:48,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-21 20:09:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:09:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 66 proven. 179 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-21 20:09:48,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591631333] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:48,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:09:48,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2021-10-21 20:09:48,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896563008] [2021-10-21 20:09:48,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-21 20:09:48,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:09:48,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-21 20:09:48,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 20:09:48,779 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 33 states, 32 states have (on average 4.40625) internal successors, (141), 30 states have internal predecessors, (141), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:49,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:09:49,726 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2021-10-21 20:09:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 20:09:49,727 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 4.40625) internal successors, (141), 30 states have internal predecessors, (141), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-10-21 20:09:49,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:09:49,728 INFO L225 Difference]: With dead ends: 142 [2021-10-21 20:09:49,728 INFO L226 Difference]: Without dead ends: 140 [2021-10-21 20:09:49,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 672.6ms TimeCoverageRelationStatistics Valid=233, Invalid=1659, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 20:09:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-10-21 20:09:49,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2021-10-21 20:09:49,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 133 states have (on average 1.0526315789473684) internal successors, (140), 135 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2021-10-21 20:09:49,733 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 122 [2021-10-21 20:09:49,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:09:49,734 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2021-10-21 20:09:49,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 4.40625) internal successors, (141), 30 states have internal predecessors, (141), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:09:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2021-10-21 20:09:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-10-21 20:09:49,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:09:49,735 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:09:49,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 20:09:49,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:49,940 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:09:49,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:09:49,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1936154041, now seen corresponding path program 15 times [2021-10-21 20:09:49,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:09:49,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704100306] [2021-10-21 20:09:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:09:49,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:09:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:50,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:09:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:09:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 36 proven. 259 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-21 20:09:50,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:09:50,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704100306] [2021-10-21 20:09:50,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704100306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:50,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723329570] [2021-10-21 20:09:50,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:09:50,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:09:50,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:09:50,798 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:09:50,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 20:09:52,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-21 20:09:52,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:09:52,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 106 conjunts are in the unsatisfiable core [2021-10-21 20:09:52,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:09:53,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:09:55,721 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-21 20:09:55,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 27 [2021-10-21 20:09:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 8 proven. 377 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 20:09:55,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723329570] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:09:55,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:09:55,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 35] total 57 [2021-10-21 20:09:55,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325299007] [2021-10-21 20:09:55,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-10-21 20:09:55,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:09:55,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-10-21 20:09:55,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=3058, Unknown=0, NotChecked=0, Total=3192 [2021-10-21 20:09:55,788 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 57 states, 56 states have (on average 3.9464285714285716) internal successors, (221), 54 states have internal predecessors, (221), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:02,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:02,468 INFO L93 Difference]: Finished difference Result 363 states and 368 transitions. [2021-10-21 20:10:02,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-21 20:10:02,468 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.9464285714285716) internal successors, (221), 54 states have internal predecessors, (221), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2021-10-21 20:10:02,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:02,469 INFO L225 Difference]: With dead ends: 363 [2021-10-21 20:10:02,469 INFO L226 Difference]: Without dead ends: 154 [2021-10-21 20:10:02,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2722 ImplicationChecksByTransitivity, 5517.2ms TimeCoverageRelationStatistics Valid=668, Invalid=13612, Unknown=0, NotChecked=0, Total=14280 [2021-10-21 20:10:02,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-21 20:10:02,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2021-10-21 20:10:02,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 141 states have (on average 1.049645390070922) internal successors, (148), 143 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:02,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2021-10-21 20:10:02,477 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 129 [2021-10-21 20:10:02,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:02,477 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2021-10-21 20:10:02,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.9464285714285716) internal successors, (221), 54 states have internal predecessors, (221), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:02,478 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2021-10-21 20:10:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-10-21 20:10:02,481 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:02,482 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:02,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:02,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-21 20:10:02,704 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:10:02,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:02,705 INFO L82 PathProgramCache]: Analyzing trace with hash 171788671, now seen corresponding path program 16 times [2021-10-21 20:10:02,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:02,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263309167] [2021-10-21 20:10:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:02,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:02,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:03,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:03,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:03,315 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 66 proven. 258 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-21 20:10:03,315 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:03,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263309167] [2021-10-21 20:10:03,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263309167] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:03,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568249251] [2021-10-21 20:10:03,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:10:03,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:03,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:03,324 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:03,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 20:10:04,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:10:04,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:10:04,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-21 20:10:04,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:04,707 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:10:04,708 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:10:04,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:10:06,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-21 20:10:06,282 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-21 20:10:06,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-21 20:10:08,496 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-10-21 20:10:08,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 26 [2021-10-21 20:10:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 98 proven. 226 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-21 20:10:08,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568249251] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:08,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:08,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 47 [2021-10-21 20:10:08,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454008870] [2021-10-21 20:10:08,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-21 20:10:08,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:08,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-21 20:10:08,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2081, Unknown=0, NotChecked=0, Total=2256 [2021-10-21 20:10:08,934 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 48 states, 46 states have (on average 4.478260869565218) internal successors, (206), 45 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:12,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:12,449 INFO L93 Difference]: Finished difference Result 157 states and 162 transitions. [2021-10-21 20:10:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-21 20:10:12,449 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 4.478260869565218) internal successors, (206), 45 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2021-10-21 20:10:12,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:12,451 INFO L225 Difference]: With dead ends: 157 [2021-10-21 20:10:12,451 INFO L226 Difference]: Without dead ends: 155 [2021-10-21 20:10:12,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 2775.9ms TimeCoverageRelationStatistics Valid=367, Invalid=3665, Unknown=0, NotChecked=0, Total=4032 [2021-10-21 20:10:12,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-21 20:10:12,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-10-21 20:10:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 148 states have (on average 1.0472972972972974) internal successors, (155), 150 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2021-10-21 20:10:12,457 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 137 [2021-10-21 20:10:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:12,458 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2021-10-21 20:10:12,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 4.478260869565218) internal successors, (206), 45 states have internal predecessors, (206), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2021-10-21 20:10:12,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-10-21 20:10:12,460 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:12,460 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:12,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:12,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-21 20:10:12,684 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:10:12,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:12,685 INFO L82 PathProgramCache]: Analyzing trace with hash -349214304, now seen corresponding path program 17 times [2021-10-21 20:10:12,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:12,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324950561] [2021-10-21 20:10:12,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:12,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:13,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:13,558 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 41 proven. 340 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-21 20:10:13,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:13,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324950561] [2021-10-21 20:10:13,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324950561] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:13,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828219037] [2021-10-21 20:10:13,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:10:13,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:13,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:13,561 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:13,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 20:10:15,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-21 20:10:15,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:10:15,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-21 20:10:15,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:15,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:10:18,074 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-10-21 20:10:18,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 36 [2021-10-21 20:10:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 9 proven. 372 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-21 20:10:18,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828219037] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:18,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:18,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 30] total 54 [2021-10-21 20:10:18,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031908018] [2021-10-21 20:10:18,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-21 20:10:18,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:18,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-21 20:10:18,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2750, Unknown=0, NotChecked=0, Total=2862 [2021-10-21 20:10:18,138 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand has 54 states, 53 states have (on average 4.132075471698113) internal successors, (219), 51 states have internal predecessors, (219), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:25,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:25,835 INFO L93 Difference]: Finished difference Result 403 states and 408 transitions. [2021-10-21 20:10:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-10-21 20:10:25,835 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 4.132075471698113) internal successors, (219), 51 states have internal predecessors, (219), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2021-10-21 20:10:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:25,836 INFO L225 Difference]: With dead ends: 403 [2021-10-21 20:10:25,837 INFO L226 Difference]: Without dead ends: 169 [2021-10-21 20:10:25,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1975 ImplicationChecksByTransitivity, 5314.5ms TimeCoverageRelationStatistics Valid=605, Invalid=12051, Unknown=0, NotChecked=0, Total=12656 [2021-10-21 20:10:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-10-21 20:10:25,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 163. [2021-10-21 20:10:25,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 156 states have (on average 1.044871794871795) internal successors, (163), 158 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:25,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 167 transitions. [2021-10-21 20:10:25,843 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 167 transitions. Word has length 144 [2021-10-21 20:10:25,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:25,843 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 167 transitions. [2021-10-21 20:10:25,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 4.132075471698113) internal successors, (219), 51 states have internal predecessors, (219), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:25,844 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 167 transitions. [2021-10-21 20:10:25,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-10-21 20:10:25,845 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:25,845 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:25,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:26,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-21 20:10:26,060 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:10:26,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:26,060 INFO L82 PathProgramCache]: Analyzing trace with hash 2138052890, now seen corresponding path program 18 times [2021-10-21 20:10:26,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:26,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896379222] [2021-10-21 20:10:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:26,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:26,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 91 proven. 323 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-21 20:10:26,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:26,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896379222] [2021-10-21 20:10:26,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896379222] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:26,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907510379] [2021-10-21 20:10:26,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:10:26,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:26,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:26,576 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:26,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 20:10:30,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-21 20:10:30,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:10:30,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-21 20:10:30,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:31,773 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 120 proven. 294 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-21 20:10:31,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907510379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:31,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:31,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 37 [2021-10-21 20:10:31,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152496242] [2021-10-21 20:10:31,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-21 20:10:31,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:31,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-21 20:10:31,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 20:10:31,776 INFO L87 Difference]: Start difference. First operand 163 states and 167 transitions. Second operand has 38 states, 37 states have (on average 5.054054054054054) internal successors, (187), 35 states have internal predecessors, (187), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:33,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:33,258 INFO L93 Difference]: Finished difference Result 172 states and 177 transitions. [2021-10-21 20:10:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-21 20:10:33,259 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 5.054054054054054) internal successors, (187), 35 states have internal predecessors, (187), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2021-10-21 20:10:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:33,260 INFO L225 Difference]: With dead ends: 172 [2021-10-21 20:10:33,260 INFO L226 Difference]: Without dead ends: 170 [2021-10-21 20:10:33,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1141.3ms TimeCoverageRelationStatistics Valid=322, Invalid=2228, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 20:10:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-21 20:10:33,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2021-10-21 20:10:33,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 163 states have (on average 1.0429447852760736) internal successors, (170), 165 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2021-10-21 20:10:33,266 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 152 [2021-10-21 20:10:33,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:33,267 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2021-10-21 20:10:33,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 5.054054054054054) internal successors, (187), 35 states have internal predecessors, (187), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2021-10-21 20:10:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-10-21 20:10:33,268 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:33,269 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:33,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:33,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-21 20:10:33,484 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:10:33,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:33,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1839471195, now seen corresponding path program 19 times [2021-10-21 20:10:33,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:33,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248605861] [2021-10-21 20:10:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:33,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:34,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 46 proven. 432 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-21 20:10:34,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:34,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248605861] [2021-10-21 20:10:34,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248605861] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:34,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912167211] [2021-10-21 20:10:34,714 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 20:10:34,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:34,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:34,716 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:34,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 20:10:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:36,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-21 20:10:36,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:37,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:10:39,466 INFO L354 Elim1Store]: treesize reduction 22, result has 43.6 percent of original size [2021-10-21 20:10:39,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 36 [2021-10-21 20:10:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 10 proven. 468 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-21 20:10:39,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912167211] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:39,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:39,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32] total 58 [2021-10-21 20:10:39,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280360048] [2021-10-21 20:10:39,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-10-21 20:10:39,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:39,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-10-21 20:10:39,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3186, Unknown=0, NotChecked=0, Total=3306 [2021-10-21 20:10:39,546 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 58 states, 57 states have (on average 4.228070175438597) internal successors, (241), 55 states have internal predecessors, (241), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:48,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:48,389 INFO L93 Difference]: Finished difference Result 443 states and 448 transitions. [2021-10-21 20:10:48,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-10-21 20:10:48,389 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 4.228070175438597) internal successors, (241), 55 states have internal predecessors, (241), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2021-10-21 20:10:48,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:48,391 INFO L225 Difference]: With dead ends: 443 [2021-10-21 20:10:48,391 INFO L226 Difference]: Without dead ends: 184 [2021-10-21 20:10:48,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2238 ImplicationChecksByTransitivity, 6127.8ms TimeCoverageRelationStatistics Valid=643, Invalid=13877, Unknown=0, NotChecked=0, Total=14520 [2021-10-21 20:10:48,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-10-21 20:10:48,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 178. [2021-10-21 20:10:48,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 171 states have (on average 1.04093567251462) internal successors, (178), 173 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:48,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2021-10-21 20:10:48,399 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 159 [2021-10-21 20:10:48,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:48,399 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2021-10-21 20:10:48,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 4.228070175438597) internal successors, (241), 55 states have internal predecessors, (241), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:48,400 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2021-10-21 20:10:48,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-10-21 20:10:48,401 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:48,401 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:48,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:48,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-10-21 20:10:48,616 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:10:48,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:48,617 INFO L82 PathProgramCache]: Analyzing trace with hash -988368149, now seen corresponding path program 20 times [2021-10-21 20:10:48,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:48,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382652709] [2021-10-21 20:10:48,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:48,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:49,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 120 proven. 395 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-21 20:10:49,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:49,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382652709] [2021-10-21 20:10:49,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382652709] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:49,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649841870] [2021-10-21 20:10:49,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 20:10:49,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:49,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:49,210 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:49,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 20:10:50,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 20:10:50,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:10:50,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-21 20:10:50,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 153 proven. 362 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-21 20:10:52,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649841870] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:52,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:10:52,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 41 [2021-10-21 20:10:52,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520301891] [2021-10-21 20:10:52,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-21 20:10:52,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:10:52,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-21 20:10:52,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1499, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 20:10:52,058 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 42 states, 41 states have (on average 4.536585365853658) internal successors, (186), 39 states have internal predecessors, (186), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:53,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:10:53,554 INFO L93 Difference]: Finished difference Result 187 states and 192 transitions. [2021-10-21 20:10:53,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 20:10:53,555 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.536585365853658) internal successors, (186), 39 states have internal predecessors, (186), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2021-10-21 20:10:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:10:53,556 INFO L225 Difference]: With dead ends: 187 [2021-10-21 20:10:53,556 INFO L226 Difference]: Without dead ends: 185 [2021-10-21 20:10:53,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 999.9ms TimeCoverageRelationStatistics Valid=356, Invalid=2724, Unknown=0, NotChecked=0, Total=3080 [2021-10-21 20:10:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-10-21 20:10:53,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2021-10-21 20:10:53,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 178 states have (on average 1.0393258426966292) internal successors, (185), 180 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:53,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2021-10-21 20:10:53,560 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 167 [2021-10-21 20:10:53,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:10:53,560 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2021-10-21 20:10:53,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.536585365853658) internal successors, (186), 39 states have internal predecessors, (186), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:10:53,560 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2021-10-21 20:10:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-10-21 20:10:53,561 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:10:53,561 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:10:53,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-21 20:10:53,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-21 20:10:53,762 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:10:53,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:10:53,762 INFO L82 PathProgramCache]: Analyzing trace with hash 681365172, now seen corresponding path program 21 times [2021-10-21 20:10:53,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:10:53,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43454821] [2021-10-21 20:10:53,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:10:53,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:10:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:54,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:10:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:10:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 51 proven. 535 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-21 20:10:54,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:10:54,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43454821] [2021-10-21 20:10:54,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43454821] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:10:54,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865435209] [2021-10-21 20:10:54,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 20:10:54,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:10:54,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:10:54,674 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:10:54,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 20:10:58,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-21 20:10:58,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:10:58,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 84 conjunts are in the unsatisfiable core [2021-10-21 20:10:58,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:10:59,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:11:01,568 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-10-21 20:11:01,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 32 [2021-10-21 20:11:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 776 backedges. 11 proven. 575 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-21 20:11:01,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865435209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:11:01,645 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:11:01,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34] total 62 [2021-10-21 20:11:01,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663455339] [2021-10-21 20:11:01,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-21 20:11:01,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:11:01,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-21 20:11:01,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=3654, Unknown=0, NotChecked=0, Total=3782 [2021-10-21 20:11:01,647 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand has 62 states, 61 states have (on average 4.311475409836065) internal successors, (263), 59 states have internal predecessors, (263), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:11,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:11:11,772 INFO L93 Difference]: Finished difference Result 483 states and 488 transitions. [2021-10-21 20:11:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-10-21 20:11:11,773 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 4.311475409836065) internal successors, (263), 59 states have internal predecessors, (263), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2021-10-21 20:11:11,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:11:11,774 INFO L225 Difference]: With dead ends: 483 [2021-10-21 20:11:11,775 INFO L226 Difference]: Without dead ends: 199 [2021-10-21 20:11:11,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 6775.1ms TimeCoverageRelationStatistics Valid=681, Invalid=15831, Unknown=0, NotChecked=0, Total=16512 [2021-10-21 20:11:11,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-10-21 20:11:11,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 193. [2021-10-21 20:11:11,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 186 states have (on average 1.0376344086021505) internal successors, (193), 188 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:11,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 197 transitions. [2021-10-21 20:11:11,782 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 197 transitions. Word has length 174 [2021-10-21 20:11:11,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:11:11,782 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 197 transitions. [2021-10-21 20:11:11,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 4.311475409836065) internal successors, (263), 59 states have internal predecessors, (263), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:11,783 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 197 transitions. [2021-10-21 20:11:11,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-10-21 20:11:11,784 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:11:11,785 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:11:11,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-21 20:11:12,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:11:12,012 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:11:12,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:11:12,013 INFO L82 PathProgramCache]: Analyzing trace with hash -119444306, now seen corresponding path program 22 times [2021-10-21 20:11:12,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:11:12,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591426827] [2021-10-21 20:11:12,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:11:12,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:11:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:11:12,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:11:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:11:12,674 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 153 proven. 474 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-10-21 20:11:12,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:11:12,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591426827] [2021-10-21 20:11:12,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591426827] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:11:12,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103265587] [2021-10-21 20:11:12,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 20:11:12,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:11:12,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:11:12,676 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:11:12,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 20:11:14,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 20:11:14,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:11:14,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-21 20:11:14,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:11:14,967 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 20:11:14,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 20:11:14,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:11:17,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-21 20:11:17,334 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-21 20:11:17,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-21 20:11:20,515 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-10-21 20:11:20,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 26 [2021-10-21 20:11:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 200 proven. 427 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-10-21 20:11:20,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103265587] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:11:20,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:11:20,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32] total 59 [2021-10-21 20:11:20,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384289828] [2021-10-21 20:11:20,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-10-21 20:11:20,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:11:20,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-10-21 20:11:20,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=3263, Unknown=0, NotChecked=0, Total=3540 [2021-10-21 20:11:20,907 INFO L87 Difference]: Start difference. First operand 193 states and 197 transitions. Second operand has 60 states, 58 states have (on average 4.689655172413793) internal successors, (272), 57 states have internal predecessors, (272), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:26,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:11:26,452 INFO L93 Difference]: Finished difference Result 202 states and 207 transitions. [2021-10-21 20:11:26,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-21 20:11:26,453 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 58 states have (on average 4.689655172413793) internal successors, (272), 57 states have internal predecessors, (272), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2021-10-21 20:11:26,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:11:26,454 INFO L225 Difference]: With dead ends: 202 [2021-10-21 20:11:26,454 INFO L226 Difference]: Without dead ends: 200 [2021-10-21 20:11:26,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 3979.6ms TimeCoverageRelationStatistics Valid=523, Invalid=5639, Unknown=0, NotChecked=0, Total=6162 [2021-10-21 20:11:26,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-21 20:11:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-10-21 20:11:26,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 195 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2021-10-21 20:11:26,459 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 182 [2021-10-21 20:11:26,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:11:26,460 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2021-10-21 20:11:26,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 58 states have (on average 4.689655172413793) internal successors, (272), 57 states have internal predecessors, (272), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:26,460 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2021-10-21 20:11:26,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-10-21 20:11:26,461 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:11:26,462 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:11:26,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-21 20:11:26,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-21 20:11:26,688 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:11:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:11:26,689 INFO L82 PathProgramCache]: Analyzing trace with hash -679140463, now seen corresponding path program 23 times [2021-10-21 20:11:26,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:11:26,689 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838760823] [2021-10-21 20:11:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:11:26,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:11:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:11:27,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:11:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:11:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 56 proven. 649 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-10-21 20:11:27,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:11:27,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838760823] [2021-10-21 20:11:27,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838760823] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:11:27,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615893099] [2021-10-21 20:11:27,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 20:11:27,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:11:27,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:11:27,804 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:11:27,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 20:11:31,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-10-21 20:11:31,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:11:31,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 88 conjunts are in the unsatisfiable core [2021-10-21 20:11:31,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:11:32,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 20:11:35,174 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-10-21 20:11:35,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 39 treesize of output 32 [2021-10-21 20:11:35,260 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 12 proven. 693 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-10-21 20:11:35,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615893099] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:11:35,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:11:35,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 36] total 66 [2021-10-21 20:11:35,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964820576] [2021-10-21 20:11:35,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-21 20:11:35,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:11:35,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-21 20:11:35,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4154, Unknown=0, NotChecked=0, Total=4290 [2021-10-21 20:11:35,263 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 66 states, 65 states have (on average 4.384615384615385) internal successors, (285), 63 states have internal predecessors, (285), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:47,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:11:47,455 INFO L93 Difference]: Finished difference Result 523 states and 528 transitions. [2021-10-21 20:11:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-10-21 20:11:47,455 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 4.384615384615385) internal successors, (285), 63 states have internal predecessors, (285), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2021-10-21 20:11:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:11:47,457 INFO L225 Difference]: With dead ends: 523 [2021-10-21 20:11:47,457 INFO L226 Difference]: Without dead ends: 214 [2021-10-21 20:11:47,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2812 ImplicationChecksByTransitivity, 7851.4ms TimeCoverageRelationStatistics Valid=719, Invalid=17913, Unknown=0, NotChecked=0, Total=18632 [2021-10-21 20:11:47,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-10-21 20:11:47,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 208. [2021-10-21 20:11:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 201 states have (on average 1.0348258706467661) internal successors, (208), 203 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:47,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2021-10-21 20:11:47,463 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 189 [2021-10-21 20:11:47,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:11:47,464 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2021-10-21 20:11:47,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 4.384615384615385) internal successors, (285), 63 states have internal predecessors, (285), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:11:47,464 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2021-10-21 20:11:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-10-21 20:11:47,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 20:11:47,466 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 20:11:47,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-21 20:11:47,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-21 20:11:47,692 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-21 20:11:47,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 20:11:47,693 INFO L82 PathProgramCache]: Analyzing trace with hash -761712041, now seen corresponding path program 24 times [2021-10-21 20:11:47,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 20:11:47,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915557615] [2021-10-21 20:11:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 20:11:47,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 20:11:47,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:11:48,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 20:11:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 20:11:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 190 proven. 560 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-10-21 20:11:48,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 20:11:48,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915557615] [2021-10-21 20:11:48,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915557615] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:11:48,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99534550] [2021-10-21 20:11:48,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 20:11:48,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 20:11:48,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 20:11:48,434 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 20:11:48,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 20:11:56,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-21 20:11:56,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 20:11:56,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-21 20:11:56,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 20:11:56,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 20:11:56,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-21 20:11:58,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-21 20:11:58,352 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-10-21 20:11:58,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-10-21 20:11:59,824 INFO L354 Elim1Store]: treesize reduction 39, result has 23.5 percent of original size [2021-10-21 20:11:59,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 35 treesize of output 26 [2021-10-21 20:12:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 948 trivial. 0 not checked. [2021-10-21 20:12:00,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99534550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 20:12:00,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 20:12:00,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 11] total 40 [2021-10-21 20:12:00,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604717301] [2021-10-21 20:12:00,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-21 20:12:00,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 20:12:00,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-21 20:12:00,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1441, Unknown=0, NotChecked=0, Total=1640 [2021-10-21 20:12:00,172 INFO L87 Difference]: Start difference. First operand 208 states and 212 transitions. Second operand has 41 states, 39 states have (on average 4.615384615384615) internal successors, (180), 38 states have internal predecessors, (180), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:04,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 20:12:04,201 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2021-10-21 20:12:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-21 20:12:04,202 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 4.615384615384615) internal successors, (180), 38 states have internal predecessors, (180), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2021-10-21 20:12:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 20:12:04,202 INFO L225 Difference]: With dead ends: 206 [2021-10-21 20:12:04,202 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 20:12:04,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 3000.9ms TimeCoverageRelationStatistics Valid=655, Invalid=4601, Unknown=0, NotChecked=0, Total=5256 [2021-10-21 20:12:04,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 20:12:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 20:12:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 20:12:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 20:12:04,203 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 197 [2021-10-21 20:12:04,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 20:12:04,203 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 20:12:04,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 4.615384615384615) internal successors, (180), 38 states have internal predecessors, (180), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 20:12:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 20:12:04,204 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 20:12:04,206 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr0REQUIRES_VIOLATION [2021-10-21 20:12:04,206 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr1REQUIRES_VIOLATION [2021-10-21 20:12:04,207 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr2REQUIRES_VIOLATION [2021-10-21 20:12:04,207 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr3REQUIRES_VIOLATION [2021-10-21 20:12:04,207 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr4REQUIRES_VIOLATION [2021-10-21 20:12:04,207 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr5REQUIRES_VIOLATION [2021-10-21 20:12:04,207 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr6REQUIRES_VIOLATION [2021-10-21 20:12:04,207 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr7REQUIRES_VIOLATION [2021-10-21 20:12:04,207 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr8REQUIRES_VIOLATION [2021-10-21 20:12:04,208 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr9REQUIRES_VIOLATION [2021-10-21 20:12:04,208 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-21 20:12:04,208 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-21 20:12:04,208 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-21 20:12:04,208 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-21 20:12:04,208 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-21 20:12:04,208 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-21 20:12:04,208 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-21 20:12:04,208 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-21 20:12:04,209 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 20:12:04,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-21 20:12:04,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-21 20:12:04,427 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 20:12:04,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 08:12:04 BoogieIcfgContainer [2021-10-21 20:12:04,435 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 20:12:04,436 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 20:12:04,436 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 20:12:04,436 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 20:12:04,464 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 08:08:08" (3/4) ... [2021-10-21 20:12:04,468 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 20:12:04,483 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 20:12:04,485 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrcmp [2021-10-21 20:12:04,486 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-21 20:12:04,486 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-21 20:12:04,491 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-21 20:12:04,491 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-21 20:12:04,492 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 20:12:04,492 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-21 20:12:04,498 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2021-10-21 20:12:04,506 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-10-21 20:12:04,507 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:12:04,507 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 20:12:04,577 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 20:12:04,578 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 20:12:04,579 INFO L168 Benchmark]: Toolchain (without parser) took 237611.56 ms. Allocated memory was 111.1 MB in the beginning and 625.0 MB in the end (delta: 513.8 MB). Free memory was 76.0 MB in the beginning and 193.3 MB in the end (delta: -117.2 MB). Peak memory consumption was 394.9 MB. Max. memory is 16.1 GB. [2021-10-21 20:12:04,580 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 75.5 MB. Free memory was 49.3 MB in the beginning and 49.2 MB in the end (delta: 27.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 20:12:04,581 INFO L168 Benchmark]: CACSL2BoogieTranslator took 587.80 ms. Allocated memory is still 111.1 MB. Free memory was 75.8 MB in the beginning and 82.6 MB in the end (delta: -6.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:12:04,581 INFO L168 Benchmark]: Boogie Preprocessor took 66.78 ms. Allocated memory is still 111.1 MB. Free memory was 82.6 MB in the beginning and 80.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:12:04,582 INFO L168 Benchmark]: RCFGBuilder took 745.61 ms. Allocated memory is still 111.1 MB. Free memory was 80.0 MB in the beginning and 59.4 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-21 20:12:04,583 INFO L168 Benchmark]: TraceAbstraction took 236057.67 ms. Allocated memory was 111.1 MB in the beginning and 625.0 MB in the end (delta: 513.8 MB). Free memory was 58.8 MB in the beginning and 196.1 MB in the end (delta: -137.3 MB). Peak memory consumption was 378.5 MB. Max. memory is 16.1 GB. [2021-10-21 20:12:04,583 INFO L168 Benchmark]: Witness Printer took 142.28 ms. Allocated memory is still 625.0 MB. Free memory was 196.1 MB in the beginning and 193.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 20:12:04,586 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 75.5 MB. Free memory was 49.3 MB in the beginning and 49.2 MB in the end (delta: 27.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 587.80 ms. Allocated memory is still 111.1 MB. Free memory was 75.8 MB in the beginning and 82.6 MB in the end (delta: -6.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 66.78 ms. Allocated memory is still 111.1 MB. Free memory was 82.6 MB in the beginning and 80.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 745.61 ms. Allocated memory is still 111.1 MB. Free memory was 80.0 MB in the beginning and 59.4 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 236057.67 ms. Allocated memory was 111.1 MB in the beginning and 625.0 MB in the end (delta: 513.8 MB). Free memory was 58.8 MB in the beginning and 196.1 MB in the end (delta: -137.3 MB). Peak memory consumption was 378.5 MB. Max. memory is 16.1 GB. * Witness Printer took 142.28 ms. Allocated memory is still 625.0 MB. Free memory was 196.1 MB in the beginning and 193.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 522]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 544]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 548]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 9 procedures, 76 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 235966.7ms, OverallIterations: 46, TraceHistogramMax: 12, EmptinessCheckTime: 68.9ms, AutomataDifference: 115631.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1849 SDtfs, 8404 SDslu, 13028 SDs, 0 SdLazy, 78534 SolverSat, 1349 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 45344.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4392 GetRequests, 2503 SyntacticMatches, 23 SemanticMatches, 1866 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24834 ImplicationChecksByTransitivity, 89438.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=45, InterpolantAutomatonStates: 1177, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 312.4ms AutomataMinimizationTime, 46 MinimizatonAttempts, 285 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 603.9ms SsaConstructionTime, 14976.7ms SatisfiabilityAnalysisTime, 71158.1ms InterpolantComputationTime, 6093 NumberOfCodeBlocks, 6038 NumberOfCodeBlocksAsserted, 170 NumberOfCheckSat, 6018 ConstructedInterpolants, 720 QuantifiedInterpolants, 65704 SizeOfPredicates, 312 NumberOfNonLiveVariables, 10916 ConjunctsInSsa, 1397 ConjunctsInUnsatCore, 75 InterpolantComputations, 17 PerfectInterpolantSequences, 7090/17384 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 - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 20:12:04,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_03b55022-96c5-401f-9104-c08cebfc1c09/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...