./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg --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 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:59:34,730 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:59:34,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:59:34,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:59:34,776 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:59:34,777 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:59:34,780 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:59:34,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:59:34,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:59:34,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:59:34,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:59:34,791 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:59:34,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:59:34,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:59:34,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:59:34,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:59:34,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:59:34,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:59:34,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:59:34,807 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:59:34,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:59:34,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:59:34,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:59:34,816 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:59:34,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:59:34,822 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:59:34,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:59:34,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:59:34,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:59:34,827 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:59:34,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:59:34,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:59:34,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:59:34,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:59:34,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:59:34,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:59:34,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:59:34,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:59:34,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:59:34,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:59:34,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:59:34,842 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 08:59:34,877 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:59:34,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:59:34,878 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:59:34,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:59:34,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:59:34,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:59:34,881 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:59:34,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:59:34,881 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:59:34,882 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:59:34,882 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:59:34,882 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:59:34,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:59:34,883 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:59:34,883 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:59:34,883 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 08:59:34,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:59:34,884 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:59:34,884 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:59:34,884 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:59:34,885 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:59:34,885 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:59:34,885 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:59:34,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:59:34,886 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:59:34,886 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:59:34,886 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:59:34,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:59:34,887 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:59:34,887 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_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd [2021-10-28 08:59:35,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:59:35,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:59:35,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:59:35,238 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:59:35,239 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:59:35,240 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2021-10-28 08:59:35,339 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/data/f4b31f04e/338935adb915427ea655ca54c36bacf7/FLAG2e3797a4f [2021-10-28 08:59:35,948 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:59:35,949 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2021-10-28 08:59:35,972 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/data/f4b31f04e/338935adb915427ea655ca54c36bacf7/FLAG2e3797a4f [2021-10-28 08:59:36,280 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/data/f4b31f04e/338935adb915427ea655ca54c36bacf7 [2021-10-28 08:59:36,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:59:36,289 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:59:36,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:59:36,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:59:36,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:59:36,310 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:59:36" (1/1) ... [2021-10-28 08:59:36,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dda1061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:36, skipping insertion in model container [2021-10-28 08:59:36,328 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:59:36" (1/1) ... [2021-10-28 08:59:36,336 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:59:36,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:59:37,341 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:59:37,359 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:59:37,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:59:37,575 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:59:37,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:37 WrapperNode [2021-10-28 08:59:37,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:59:37,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:59:37,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:59:37,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:59:37,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:37" (1/1) ... [2021-10-28 08:59:37,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:37" (1/1) ... [2021-10-28 08:59:37,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:37" (1/1) ... [2021-10-28 08:59:37,664 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:37" (1/1) ... [2021-10-28 08:59:37,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:37" (1/1) ... [2021-10-28 08:59:37,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:37" (1/1) ... [2021-10-28 08:59:37,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:37" (1/1) ... [2021-10-28 08:59:37,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:59:37,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:59:37,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:59:37,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:59:37,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:37" (1/1) ... [2021-10-28 08:59:37,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:59:37,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:59:37,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:59:37,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:59:37,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:59:37,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:59:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 08:59:37,989 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 08:59:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 08:59:37,990 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 08:59:37,991 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 08:59:37,992 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrcmp [2021-10-28 08:59:37,992 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:59:37,992 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 08:59:37,992 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 08:59:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 08:59:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 08:59:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 08:59:37,994 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 08:59:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 08:59:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 08:59:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 08:59:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 08:59:37,995 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 08:59:37,996 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 08:59:37,996 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 08:59:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 08:59:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 08:59:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 08:59:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 08:59:37,997 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 08:59:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 08:59:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 08:59:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 08:59:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 08:59:37,998 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 08:59:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 08:59:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 08:59:37,999 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 08:59:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 08:59:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 08:59:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 08:59:38,000 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 08:59:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 08:59:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 08:59:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 08:59:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 08:59:38,001 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 08:59:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 08:59:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 08:59:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 08:59:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 08:59:38,002 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 08:59:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 08:59:38,003 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 08:59:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 08:59:38,004 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 08:59:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 08:59:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 08:59:38,005 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 08:59:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 08:59:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 08:59:38,006 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 08:59:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 08:59:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 08:59:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 08:59:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 08:59:38,007 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 08:59:38,008 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 08:59:38,008 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 08:59:38,008 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 08:59:38,009 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 08:59:38,010 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 08:59:38,011 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 08:59:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 08:59:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 08:59:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:59:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 08:59:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 08:59:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 08:59:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 08:59:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 08:59:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 08:59:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 08:59:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 08:59:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 08:59:38,015 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 08:59:38,015 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 08:59:38,016 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 08:59:38,016 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 08:59:38,016 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 08:59:38,016 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 08:59:38,016 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 08:59:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 08:59:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 08:59:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 08:59:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 08:59:38,017 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 08:59:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 08:59:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 08:59:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 08:59:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 08:59:38,018 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 08:59:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 08:59:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 08:59:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 08:59:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 08:59:38,019 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 08:59:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 08:59:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 08:59:38,020 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 08:59:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 08:59:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 08:59:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 08:59:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 08:59:38,021 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 08:59:38,022 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 08:59:38,023 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 08:59:38,023 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 08:59:38,023 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 08:59:38,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 08:59:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-28 08:59:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure cstrcmp [2021-10-28 08:59:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 08:59:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:59:38,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:59:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 08:59:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:59:38,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:59:38,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:59:38,647 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:59:38,648 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-28 08:59:38,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:59:38 BoogieIcfgContainer [2021-10-28 08:59:38,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:59:38,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:59:38,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:59:38,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:59:38,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:59:36" (1/3) ... [2021-10-28 08:59:38,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f60cd0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:59:38, skipping insertion in model container [2021-10-28 08:59:38,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:59:37" (2/3) ... [2021-10-28 08:59:38,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f60cd0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:59:38, skipping insertion in model container [2021-10-28 08:59:38,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:59:38" (3/3) ... [2021-10-28 08:59:38,661 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2021-10-28 08:59:38,667 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:59:38,668 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-10-28 08:59:38,734 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:59:38,741 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 [2021-10-28 08:59:38,741 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-10-28 08:59:38,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 32 states have (on average 1.875) internal successors, (60), 51 states have internal predecessors, (60), 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) [2021-10-28 08:59:38,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 08:59:38,768 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:38,768 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:38,769 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:38,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:38,775 INFO L85 PathProgramCache]: Analyzing trace with hash -568922052, now seen corresponding path program 1 times [2021-10-28 08:59:38,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:38,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133388653] [2021-10-28 08:59:38,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:38,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:39,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:39,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:39,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:39,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133388653] [2021-10-28 08:59:39,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133388653] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:39,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:39,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:59:39,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503720192] [2021-10-28 08:59:39,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:59:39,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:39,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:59:39,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:59:39,093 INFO L87 Difference]: Start difference. First operand has 58 states, 32 states have (on average 1.875) internal successors, (60), 51 states have internal predecessors, (60), 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 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) [2021-10-28 08:59:39,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:39,337 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-10-28 08:59:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:59:39,340 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 [2021-10-28 08:59:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:39,354 INFO L225 Difference]: With dead ends: 56 [2021-10-28 08:59:39,355 INFO L226 Difference]: Without dead ends: 53 [2021-10-28 08:59:39,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:59:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-28 08:59:39,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-10-28 08:59:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 47 states have internal predecessors, (53), 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) [2021-10-28 08:59:39,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2021-10-28 08:59:39,413 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 11 [2021-10-28 08:59:39,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:39,414 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2021-10-28 08:59:39,414 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) [2021-10-28 08:59:39,415 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2021-10-28 08:59:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 08:59:39,416 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:39,416 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:39,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:59:39,417 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:39,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:39,418 INFO L85 PathProgramCache]: Analyzing trace with hash -568922051, now seen corresponding path program 1 times [2021-10-28 08:59:39,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:39,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513043927] [2021-10-28 08:59:39,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:39,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:39,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:39,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:39,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513043927] [2021-10-28 08:59:39,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513043927] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:39,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:39,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:59:39,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479156849] [2021-10-28 08:59:39,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:59:39,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:39,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:59:39,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:59:39,667 INFO L87 Difference]: Start difference. First operand 53 states and 58 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) [2021-10-28 08:59:39,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:39,899 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2021-10-28 08:59:39,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:59:39,900 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 [2021-10-28 08:59:39,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:39,904 INFO L225 Difference]: With dead ends: 73 [2021-10-28 08:59:39,904 INFO L226 Difference]: Without dead ends: 73 [2021-10-28 08:59:39,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:59:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-28 08:59:39,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 55. [2021-10-28 08:59:39,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 33 states have (on average 1.696969696969697) internal successors, (56), 49 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) [2021-10-28 08:59:39,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-10-28 08:59:39,929 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 11 [2021-10-28 08:59:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:39,930 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-10-28 08:59:39,930 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) [2021-10-28 08:59:39,944 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-10-28 08:59:39,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 08:59:39,946 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:39,946 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:39,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:59:39,947 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:39,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:39,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1273294668, now seen corresponding path program 1 times [2021-10-28 08:59:39,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:39,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23898371] [2021-10-28 08:59:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:39,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:40,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:40,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:40,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23898371] [2021-10-28 08:59:40,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23898371] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:40,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:40,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:59:40,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322217900] [2021-10-28 08:59:40,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:59:40,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:40,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:59:40,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:59:40,069 INFO L87 Difference]: Start difference. First operand 55 states and 61 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) [2021-10-28 08:59:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:40,290 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2021-10-28 08:59:40,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:59:40,291 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 [2021-10-28 08:59:40,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:40,296 INFO L225 Difference]: With dead ends: 54 [2021-10-28 08:59:40,296 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 08:59:40,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:59:40,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 08:59:40,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-28 08:59:40,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 48 states have internal predecessors, (55), 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) [2021-10-28 08:59:40,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-10-28 08:59:40,316 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 13 [2021-10-28 08:59:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:40,317 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-10-28 08:59:40,317 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) [2021-10-28 08:59:40,318 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-10-28 08:59:40,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 08:59:40,318 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:40,318 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:40,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:59:40,319 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr2REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:40,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:40,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1273294616, now seen corresponding path program 1 times [2021-10-28 08:59:40,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:40,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268318305] [2021-10-28 08:59:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:40,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:40,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:40,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:40,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:40,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268318305] [2021-10-28 08:59:40,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268318305] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:40,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:40,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:59:40,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615697390] [2021-10-28 08:59:40,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:59:40,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:40,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:59:40,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:59:40,417 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.0) 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) [2021-10-28 08:59:40,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:40,620 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-10-28 08:59:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:59:40,621 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) 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 [2021-10-28 08:59:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:40,629 INFO L225 Difference]: With dead ends: 72 [2021-10-28 08:59:40,630 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 08:59:40,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:59:40,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 08:59:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2021-10-28 08:59:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 57 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) [2021-10-28 08:59:40,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2021-10-28 08:59:40,655 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 13 [2021-10-28 08:59:40,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:40,656 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2021-10-28 08:59:40,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) 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) [2021-10-28 08:59:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2021-10-28 08:59:40,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 08:59:40,658 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:40,658 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:40,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:59:40,660 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:40,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:40,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1216036314, now seen corresponding path program 1 times [2021-10-28 08:59:40,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:40,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540989520] [2021-10-28 08:59:40,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:40,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:40,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:40,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:40,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540989520] [2021-10-28 08:59:40,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540989520] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:40,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:40,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:59:40,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460318905] [2021-10-28 08:59:40,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:59:40,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:40,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:59:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:59:40,761 INFO L87 Difference]: Start difference. First operand 63 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) [2021-10-28 08:59:40,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:40,888 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-10-28 08:59:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:59:40,891 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 [2021-10-28 08:59:40,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:40,894 INFO L225 Difference]: With dead ends: 61 [2021-10-28 08:59:40,894 INFO L226 Difference]: Without dead ends: 61 [2021-10-28 08:59:40,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:59:40,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-28 08:59:40,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-10-28 08:59:40,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 55 states have internal predecessors, (65), 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) [2021-10-28 08:59:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-10-28 08:59:40,921 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2021-10-28 08:59:40,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:40,922 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-10-28 08:59:40,922 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) [2021-10-28 08:59:40,922 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-10-28 08:59:40,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 08:59:40,923 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:40,924 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:40,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 08:59:40,924 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:40,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:40,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1216036313, now seen corresponding path program 1 times [2021-10-28 08:59:40,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:40,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345822836] [2021-10-28 08:59:40,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:40,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:40,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:41,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:41,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:41,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345822836] [2021-10-28 08:59:41,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345822836] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:41,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:41,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:59:41,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306306877] [2021-10-28 08:59:41,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:59:41,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:41,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:59:41,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:59:41,061 INFO L87 Difference]: Start difference. First operand 61 states and 70 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) [2021-10-28 08:59:41,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:41,295 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2021-10-28 08:59:41,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:59:41,300 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 [2021-10-28 08:59:41,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:41,301 INFO L225 Difference]: With dead ends: 72 [2021-10-28 08:59:41,301 INFO L226 Difference]: Without dead ends: 72 [2021-10-28 08:59:41,301 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:59:41,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-28 08:59:41,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2021-10-28 08:59:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.5454545454545454) internal successors, (68), 57 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) [2021-10-28 08:59:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-10-28 08:59:41,307 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 13 [2021-10-28 08:59:41,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:41,307 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-10-28 08:59:41,308 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) [2021-10-28 08:59:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-10-28 08:59:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 08:59:41,309 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:41,309 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:41,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 08:59:41,310 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr7REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:41,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:41,311 INFO L85 PathProgramCache]: Analyzing trace with hash -817429008, now seen corresponding path program 1 times [2021-10-28 08:59:41,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:41,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599428137] [2021-10-28 08:59:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:41,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:41,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:41,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:41,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599428137] [2021-10-28 08:59:41,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599428137] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:41,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:41,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:59:41,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883849350] [2021-10-28 08:59:41,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:59:41,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:59:41,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:59:41,445 INFO L87 Difference]: Start difference. First operand 63 states and 73 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) [2021-10-28 08:59:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:41,584 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2021-10-28 08:59:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:59:41,585 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 [2021-10-28 08:59:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:41,586 INFO L225 Difference]: With dead ends: 62 [2021-10-28 08:59:41,586 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 08:59:41,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:59:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 08:59:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-28 08:59:41,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.5227272727272727) 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) [2021-10-28 08:59:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-10-28 08:59:41,613 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 14 [2021-10-28 08:59:41,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:41,613 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-10-28 08:59:41,614 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) [2021-10-28 08:59:41,614 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-10-28 08:59:41,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 08:59:41,615 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:41,615 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:41,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 08:59:41,617 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:41,618 INFO L85 PathProgramCache]: Analyzing trace with hash 478071552, now seen corresponding path program 1 times [2021-10-28 08:59:41,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:41,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792384165] [2021-10-28 08:59:41,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:41,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:41,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:41,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:41,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792384165] [2021-10-28 08:59:41,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792384165] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:41,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361722978] [2021-10-28 08:59:41,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:41,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:59:41,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:59:41,816 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:59:41,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 08:59:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:41,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 08:59:41,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:59:42,099 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:59:42,100 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 [2021-10-28 08:59:42,124 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 [2021-10-28 08:59:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:42,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361722978] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:42,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:59:42,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 08:59:42,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430206985] [2021-10-28 08:59:42,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:59:42,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:42,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:59:42,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:59:42,324 INFO L87 Difference]: Start difference. First operand 62 states and 72 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) [2021-10-28 08:59:42,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:42,549 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-10-28 08:59:42,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:59:42,550 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 [2021-10-28 08:59:42,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:42,551 INFO L225 Difference]: With dead ends: 81 [2021-10-28 08:59:42,551 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 08:59:42,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:59:42,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 08:59:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2021-10-28 08:59:42,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 40 states have (on average 1.475) internal successors, (59), 51 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) [2021-10-28 08:59:42,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-10-28 08:59:42,568 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 15 [2021-10-28 08:59:42,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:42,568 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-10-28 08:59:42,569 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) [2021-10-28 08:59:42,569 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-10-28 08:59:42,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 08:59:42,572 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:42,572 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:42,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:59:42,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 08:59:42,790 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting cstrcmpErr0REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:42,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:42,791 INFO L85 PathProgramCache]: Analyzing trace with hash 437037254, now seen corresponding path program 1 times [2021-10-28 08:59:42,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:42,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616132246] [2021-10-28 08:59:42,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:42,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:42,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:42,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:42,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616132246] [2021-10-28 08:59:42,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616132246] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:42,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:42,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:59:42,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458276556] [2021-10-28 08:59:42,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:59:42,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:42,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:59:42,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:59:42,986 INFO L87 Difference]: Start difference. First operand 57 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) [2021-10-28 08:59:43,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:43,127 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-10-28 08:59:43,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:59:43,128 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 [2021-10-28 08:59:43,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:43,129 INFO L225 Difference]: With dead ends: 55 [2021-10-28 08:59:43,129 INFO L226 Difference]: Without dead ends: 55 [2021-10-28 08:59:43,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:59:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-28 08:59:43,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-10-28 08:59:43,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.425) internal successors, (57), 49 states have internal predecessors, (57), 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) [2021-10-28 08:59:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-10-28 08:59:43,134 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 17 [2021-10-28 08:59:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:43,135 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-10-28 08:59:43,135 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) [2021-10-28 08:59:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-10-28 08:59:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 08:59:43,136 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:43,137 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:43,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 08:59:43,137 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:43,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:43,138 INFO L85 PathProgramCache]: Analyzing trace with hash 437037255, now seen corresponding path program 1 times [2021-10-28 08:59:43,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:43,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349012] [2021-10-28 08:59:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:43,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:43,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:43,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:43,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:43,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349012] [2021-10-28 08:59:43,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349012] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:43,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:43,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:59:43,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651503261] [2021-10-28 08:59:43,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:59:43,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:43,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:59:43,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:59:43,267 INFO L87 Difference]: Start difference. First operand 55 states and 62 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) [2021-10-28 08:59:43,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:43,553 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-10-28 08:59:43,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:59:43,553 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 [2021-10-28 08:59:43,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:43,556 INFO L225 Difference]: With dead ends: 69 [2021-10-28 08:59:43,556 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 08:59:43,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:59:43,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 08:59:43,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-10-28 08:59:43,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 54 states have internal predecessors, (65), 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) [2021-10-28 08:59:43,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2021-10-28 08:59:43,561 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 17 [2021-10-28 08:59:43,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:43,562 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2021-10-28 08:59:43,562 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) [2021-10-28 08:59:43,563 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2021-10-28 08:59:43,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 08:59:43,563 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:43,564 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:43,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 08:59:43,564 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:43,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:43,565 INFO L85 PathProgramCache]: Analyzing trace with hash 92671082, now seen corresponding path program 1 times [2021-10-28 08:59:43,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:43,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320445822] [2021-10-28 08:59:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:43,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:43,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:43,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:43,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320445822] [2021-10-28 08:59:43,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320445822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:43,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904629816] [2021-10-28 08:59:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:43,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:59:43,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:59:43,701 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:59:43,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 08:59:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:43,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 08:59:43,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:59:43,921 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 08:59:43,921 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 [2021-10-28 08:59:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:44,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904629816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:44,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:59:44,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-28 08:59:44,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516231831] [2021-10-28 08:59:44,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:59:44,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:44,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:59:44,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:59:44,097 INFO L87 Difference]: Start difference. First operand 60 states and 70 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) [2021-10-28 08:59:44,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:44,340 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-10-28 08:59:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:59:44,341 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 [2021-10-28 08:59:44,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:44,342 INFO L225 Difference]: With dead ends: 67 [2021-10-28 08:59:44,342 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 08:59:44,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:59:44,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 08:59:44,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2021-10-28 08:59:44,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 51 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) [2021-10-28 08:59:44,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2021-10-28 08:59:44,347 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 17 [2021-10-28 08:59:44,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:44,347 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2021-10-28 08:59:44,347 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) [2021-10-28 08:59:44,347 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2021-10-28 08:59:44,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 08:59:44,349 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:44,349 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:44,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:59:44,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:59:44,569 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrcmpErr2REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:44,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:44,569 INFO L85 PathProgramCache]: Analyzing trace with hash -913994489, now seen corresponding path program 1 times [2021-10-28 08:59:44,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:44,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411110443] [2021-10-28 08:59:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:44,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:44,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:44,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:44,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:44,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411110443] [2021-10-28 08:59:44,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411110443] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:44,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:44,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 08:59:44,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811078909] [2021-10-28 08:59:44,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:59:44,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:44,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:59:44,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:59:44,668 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-10-28 08:59:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:44,858 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-10-28 08:59:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:59:44,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 19 [2021-10-28 08:59:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:44,859 INFO L225 Difference]: With dead ends: 56 [2021-10-28 08:59:44,859 INFO L226 Difference]: Without dead ends: 56 [2021-10-28 08:59:44,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:59:44,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-28 08:59:44,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-28 08:59:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.372093023255814) 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) [2021-10-28 08:59:44,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-10-28 08:59:44,862 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 19 [2021-10-28 08:59:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:44,863 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-10-28 08:59:44,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-10-28 08:59:44,863 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-10-28 08:59:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 08:59:44,864 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:44,864 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:44,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 08:59:44,864 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:44,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:44,865 INFO L85 PathProgramCache]: Analyzing trace with hash -913994488, now seen corresponding path program 1 times [2021-10-28 08:59:44,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:44,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551630002] [2021-10-28 08:59:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:44,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:44,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:44,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:44,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:44,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551630002] [2021-10-28 08:59:44,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551630002] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:44,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:44,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 08:59:44,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341788387] [2021-10-28 08:59:44,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:59:44,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:44,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:59:44,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:59:44,992 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-10-28 08:59:45,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:45,248 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-10-28 08:59:45,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:59:45,249 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 19 [2021-10-28 08:59:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:45,250 INFO L225 Difference]: With dead ends: 56 [2021-10-28 08:59:45,250 INFO L226 Difference]: Without dead ends: 56 [2021-10-28 08:59:45,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-28 08:59:45,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-28 08:59:45,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-28 08:59:45,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 50 states have internal predecessors, (58), 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) [2021-10-28 08:59:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-10-28 08:59:45,254 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 19 [2021-10-28 08:59:45,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:45,254 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-10-28 08:59:45,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2021-10-28 08:59:45,255 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-10-28 08:59:45,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 08:59:45,255 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:45,255 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:45,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 08:59:45,256 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrcmpErr4REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:45,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:45,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2119591432, now seen corresponding path program 1 times [2021-10-28 08:59:45,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:45,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415870942] [2021-10-28 08:59:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:45,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:45,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:45,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:45,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415870942] [2021-10-28 08:59:45,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415870942] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:45,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:45,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 08:59:45,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50134079] [2021-10-28 08:59:45,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:59:45,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:45,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:59:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:59:45,362 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-10-28 08:59:45,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:45,544 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-10-28 08:59:45,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:59:45,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 [2021-10-28 08:59:45,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:45,546 INFO L225 Difference]: With dead ends: 55 [2021-10-28 08:59:45,546 INFO L226 Difference]: Without dead ends: 55 [2021-10-28 08:59:45,546 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:59:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-28 08:59:45,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-10-28 08:59:45,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 49 states have internal predecessors, (57), 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) [2021-10-28 08:59:45,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-10-28 08:59:45,550 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 21 [2021-10-28 08:59:45,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:45,550 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-10-28 08:59:45,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-10-28 08:59:45,551 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-10-28 08:59:45,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 08:59:45,552 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:45,552 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:45,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-28 08:59:45,553 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:45,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:45,553 INFO L85 PathProgramCache]: Analyzing trace with hash 2119591433, now seen corresponding path program 1 times [2021-10-28 08:59:45,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:45,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150435666] [2021-10-28 08:59:45,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:45,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:45,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:45,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:45,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:45,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150435666] [2021-10-28 08:59:45,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150435666] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:45,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:45,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 08:59:45,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848392434] [2021-10-28 08:59:45,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 08:59:45,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:45,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 08:59:45,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:59:45,655 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) 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) [2021-10-28 08:59:45,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:45,866 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2021-10-28 08:59:45,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 08:59:45,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) 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 [2021-10-28 08:59:45,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:45,868 INFO L225 Difference]: With dead ends: 64 [2021-10-28 08:59:45,868 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 08:59:45,868 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-28 08:59:45,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 08:59:45,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2021-10-28 08:59:45,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.3181818181818181) internal successors, (58), 50 states have internal predecessors, (58), 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) [2021-10-28 08:59:45,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-10-28 08:59:45,871 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 21 [2021-10-28 08:59:45,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:45,872 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-10-28 08:59:45,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) 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) [2021-10-28 08:59:45,872 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-10-28 08:59:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 08:59:45,873 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:45,873 INFO L513 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] [2021-10-28 08:59:45,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-28 08:59:45,874 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrcmpErr8REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:45,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1112818005, now seen corresponding path program 1 times [2021-10-28 08:59:45,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:45,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683545795] [2021-10-28 08:59:45,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:45,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:45,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:45,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:45,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683545795] [2021-10-28 08:59:45,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683545795] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:45,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:45,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 08:59:45,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183600327] [2021-10-28 08:59:45,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 08:59:45,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:45,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 08:59:45,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:59:45,950 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-10-28 08:59:46,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:46,101 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-10-28 08:59:46,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:59:46,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 23 [2021-10-28 08:59:46,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:46,104 INFO L225 Difference]: With dead ends: 55 [2021-10-28 08:59:46,104 INFO L226 Difference]: Without dead ends: 55 [2021-10-28 08:59:46,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 08:59:46,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-28 08:59:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-10-28 08:59:46,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 49 states have internal predecessors, (57), 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) [2021-10-28 08:59:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-10-28 08:59:46,108 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 23 [2021-10-28 08:59:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:46,109 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-10-28 08:59:46,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-10-28 08:59:46,110 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-10-28 08:59:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 08:59:46,111 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:46,111 INFO L513 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] [2021-10-28 08:59:46,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 08:59:46,112 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrcmpErr9REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:46,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:46,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1112818006, now seen corresponding path program 1 times [2021-10-28 08:59:46,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:46,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306158823] [2021-10-28 08:59:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:46,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:46,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:46,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:46,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306158823] [2021-10-28 08:59:46,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306158823] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:46,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:46,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 08:59:46,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496568627] [2021-10-28 08:59:46,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 08:59:46,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:46,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 08:59:46,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-10-28 08:59:46,252 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2021-10-28 08:59:46,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:46,570 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-10-28 08:59:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:59:46,571 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 23 [2021-10-28 08:59:46,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:46,572 INFO L225 Difference]: With dead ends: 63 [2021-10-28 08:59:46,572 INFO L226 Difference]: Without dead ends: 63 [2021-10-28 08:59:46,572 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:59:46,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-28 08:59:46,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-10-28 08:59:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 51 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) [2021-10-28 08:59:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2021-10-28 08:59:46,576 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 23 [2021-10-28 08:59:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:46,576 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2021-10-28 08:59:46,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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) [2021-10-28 08:59:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2021-10-28 08:59:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 08:59:46,577 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:46,577 INFO L513 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] [2021-10-28 08:59:46,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 08:59:46,577 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:46,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:46,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1112867735, now seen corresponding path program 1 times [2021-10-28 08:59:46,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:46,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591872658] [2021-10-28 08:59:46,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:46,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:46,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:46,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:46,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591872658] [2021-10-28 08:59:46,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591872658] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:46,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:46,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 08:59:46,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563532183] [2021-10-28 08:59:46,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 08:59:46,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:46,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 08:59:46,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-28 08:59:46,833 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 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) [2021-10-28 08:59:47,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:47,180 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2021-10-28 08:59:47,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 08:59:47,180 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 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 23 [2021-10-28 08:59:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:47,182 INFO L225 Difference]: With dead ends: 93 [2021-10-28 08:59:47,182 INFO L226 Difference]: Without dead ends: 93 [2021-10-28 08:59:47,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:59:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-28 08:59:47,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2021-10-28 08:59:47,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 69 states have (on average 1.2463768115942029) internal successors, (86), 75 states have internal predecessors, (86), 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) [2021-10-28 08:59:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2021-10-28 08:59:47,187 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 23 [2021-10-28 08:59:47,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:47,187 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2021-10-28 08:59:47,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 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) [2021-10-28 08:59:47,187 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2021-10-28 08:59:47,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 08:59:47,188 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:47,188 INFO L513 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] [2021-10-28 08:59:47,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 08:59:47,188 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:47,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:47,189 INFO L85 PathProgramCache]: Analyzing trace with hash 590156061, now seen corresponding path program 1 times [2021-10-28 08:59:47,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:47,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772702059] [2021-10-28 08:59:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:47,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:47,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:47,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:47,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-10-28 08:59:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:47,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:47,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772702059] [2021-10-28 08:59:47,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772702059] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:47,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:47,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:59:47,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385363032] [2021-10-28 08:59:47,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:59:47,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:47,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:59:47,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:59:47,268 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2021-10-28 08:59:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:47,331 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-10-28 08:59:47,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:59:47,332 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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 26 [2021-10-28 08:59:47,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:47,333 INFO L225 Difference]: With dead ends: 81 [2021-10-28 08:59:47,333 INFO L226 Difference]: Without dead ends: 50 [2021-10-28 08:59:47,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:59:47,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-28 08:59:47,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-28 08:59:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 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) [2021-10-28 08:59:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-10-28 08:59:47,337 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 26 [2021-10-28 08:59:47,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:47,337 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-10-28 08:59:47,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 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) [2021-10-28 08:59:47,338 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-10-28 08:59:47,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-28 08:59:47,338 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:47,339 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:47,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-28 08:59:47,339 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:47,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:47,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1603523034, now seen corresponding path program 1 times [2021-10-28 08:59:47,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:47,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418593477] [2021-10-28 08:59:47,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:47,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:47,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:47,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:47,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:47,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418593477] [2021-10-28 08:59:47,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418593477] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:47,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484789617] [2021-10-28 08:59:47,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:47,526 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:59:47,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:59:47,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:59:47,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 08:59:47,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:47,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 08:59:47,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:59:47,751 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 08:59:47,752 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 [2021-10-28 08:59:47,759 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 [2021-10-28 08:59:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:59:48,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484789617] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:48,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:59:48,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2021-10-28 08:59:48,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432657259] [2021-10-28 08:59:48,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 08:59:48,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:48,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 08:59:48,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-10-28 08:59:48,073 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 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) [2021-10-28 08:59:48,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:48,538 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2021-10-28 08:59:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 08:59:48,539 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 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 27 [2021-10-28 08:59:48,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:48,540 INFO L225 Difference]: With dead ends: 66 [2021-10-28 08:59:48,540 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 08:59:48,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-10-28 08:59:48,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 08:59:48,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 56. [2021-10-28 08:59:48,543 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) [2021-10-28 08:59:48,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-10-28 08:59:48,544 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 27 [2021-10-28 08:59:48,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:48,545 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-10-28 08:59:48,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 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) [2021-10-28 08:59:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-10-28 08:59:48,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 08:59:48,545 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:48,546 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:48,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:59:48,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:59:48,765 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:48,765 INFO L85 PathProgramCache]: Analyzing trace with hash -907625125, now seen corresponding path program 1 times [2021-10-28 08:59:48,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:48,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703000571] [2021-10-28 08:59:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:48,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:48,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:49,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:59:49,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:49,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703000571] [2021-10-28 08:59:49,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703000571] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:49,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:49,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-28 08:59:49,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278854622] [2021-10-28 08:59:49,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 08:59:49,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:49,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 08:59:49,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-10-28 08:59:49,065 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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) [2021-10-28 08:59:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:49,401 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2021-10-28 08:59:49,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:59:49,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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 29 [2021-10-28 08:59:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:49,402 INFO L225 Difference]: With dead ends: 66 [2021-10-28 08:59:49,402 INFO L226 Difference]: Without dead ends: 48 [2021-10-28 08:59:49,403 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-10-28 08:59:49,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-28 08:59:49,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-28 08:59:49,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 43 states have internal predecessors, (49), 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) [2021-10-28 08:59:49,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2021-10-28 08:59:49,406 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 29 [2021-10-28 08:59:49,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:49,406 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2021-10-28 08:59:49,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 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) [2021-10-28 08:59:49,406 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2021-10-28 08:59:49,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 08:59:49,407 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:49,407 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:49,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 08:59:49,407 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:49,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:49,408 INFO L85 PathProgramCache]: Analyzing trace with hash -688770407, now seen corresponding path program 1 times [2021-10-28 08:59:49,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:49,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786572923] [2021-10-28 08:59:49,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:49,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:49,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:49,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:59:49,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:49,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786572923] [2021-10-28 08:59:49,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786572923] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:59:49,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:59:49,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-28 08:59:49,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698929510] [2021-10-28 08:59:49,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 08:59:49,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:49,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 08:59:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-10-28 08:59:49,705 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 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) [2021-10-28 08:59:50,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:50,037 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-10-28 08:59:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 08:59:50,040 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 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 29 [2021-10-28 08:59:50,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:50,041 INFO L225 Difference]: With dead ends: 62 [2021-10-28 08:59:50,041 INFO L226 Difference]: Without dead ends: 52 [2021-10-28 08:59:50,042 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-10-28 08:59:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-28 08:59:50,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-10-28 08:59:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.25) internal successors, (50), 44 states have internal predecessors, (50), 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) [2021-10-28 08:59:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-10-28 08:59:50,044 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 29 [2021-10-28 08:59:50,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:50,044 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-10-28 08:59:50,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 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) [2021-10-28 08:59:50,045 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-10-28 08:59:50,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 08:59:50,045 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:50,045 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:50,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-28 08:59:50,046 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:50,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:50,046 INFO L85 PathProgramCache]: Analyzing trace with hash -196593956, now seen corresponding path program 1 times [2021-10-28 08:59:50,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:50,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448759052] [2021-10-28 08:59:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:50,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:50,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:59:50,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:50,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448759052] [2021-10-28 08:59:50,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448759052] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:50,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714055077] [2021-10-28 08:59:50,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:50,255 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:59:50,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:59:50,257 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:59:50,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 08:59:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:50,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 08:59:50,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:59:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:59:50,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714055077] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:50,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:59:50,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-10-28 08:59:50,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300131732] [2021-10-28 08:59:50,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 08:59:50,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:50,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 08:59:50,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-10-28 08:59:50,708 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 19 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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) [2021-10-28 08:59:51,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:51,136 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-10-28 08:59:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 08:59:51,137 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 33 [2021-10-28 08:59:51,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:51,138 INFO L225 Difference]: With dead ends: 52 [2021-10-28 08:59:51,138 INFO L226 Difference]: Without dead ends: 52 [2021-10-28 08:59:51,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-10-28 08:59:51,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-28 08:59:51,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2021-10-28 08:59:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.225) internal successors, (49), 44 states have internal predecessors, (49), 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) [2021-10-28 08:59:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-10-28 08:59:51,141 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 33 [2021-10-28 08:59:51,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:51,141 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-10-28 08:59:51,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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) [2021-10-28 08:59:51,142 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-10-28 08:59:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-28 08:59:51,142 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:51,142 INFO L513 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] [2021-10-28 08:59:51,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:59:51,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:59:51,353 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:51,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:51,353 INFO L85 PathProgramCache]: Analyzing trace with hash 51768029, now seen corresponding path program 1 times [2021-10-28 08:59:51,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:51,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542475089] [2021-10-28 08:59:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:51,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:51,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:51,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:59:51,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:51,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542475089] [2021-10-28 08:59:51,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542475089] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:51,563 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133628125] [2021-10-28 08:59:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:51,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:59:51,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:59:51,565 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:59:51,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 08:59:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:51,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 08:59:51,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:59:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:59:52,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133628125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:52,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:59:52,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-10-28 08:59:52,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131610279] [2021-10-28 08:59:52,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 08:59:52,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:52,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 08:59:52,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-10-28 08:59:52,068 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 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) [2021-10-28 08:59:52,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:52,538 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2021-10-28 08:59:52,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 08:59:52,539 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 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 35 [2021-10-28 08:59:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:52,540 INFO L225 Difference]: With dead ends: 57 [2021-10-28 08:59:52,540 INFO L226 Difference]: Without dead ends: 57 [2021-10-28 08:59:52,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-10-28 08:59:52,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-28 08:59:52,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2021-10-28 08:59:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 45 states have internal predecessors, (50), 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) [2021-10-28 08:59:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-10-28 08:59:52,544 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 35 [2021-10-28 08:59:52,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:52,544 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-10-28 08:59:52,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 15 states have internal predecessors, (52), 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) [2021-10-28 08:59:52,545 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-10-28 08:59:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 08:59:52,546 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:52,546 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:52,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:59:52,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 08:59:52,757 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrcmpErr9REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:52,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:52,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1790582486, now seen corresponding path program 1 times [2021-10-28 08:59:52,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:52,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956521331] [2021-10-28 08:59:52,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:52,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:53,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:53,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:53,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:59:53,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:53,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956521331] [2021-10-28 08:59:53,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956521331] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:53,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757230615] [2021-10-28 08:59:53,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:53,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:59:53,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:59:53,461 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:59:53,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 08:59:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:53,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-28 08:59:53,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:59:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:59:54,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757230615] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:54,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:59:54,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-10-28 08:59:54,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195306961] [2021-10-28 08:59:54,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 08:59:54,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:54,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 08:59:54,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-10-28 08:59:54,023 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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) [2021-10-28 08:59:54,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:54,553 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-10-28 08:59:54,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 08:59:54,554 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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 37 [2021-10-28 08:59:54,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:54,555 INFO L225 Difference]: With dead ends: 59 [2021-10-28 08:59:54,555 INFO L226 Difference]: Without dead ends: 56 [2021-10-28 08:59:54,556 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-10-28 08:59:54,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-28 08:59:54,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2021-10-28 08:59:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.2) internal successors, (48), 44 states have internal predecessors, (48), 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) [2021-10-28 08:59:54,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-10-28 08:59:54,559 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 37 [2021-10-28 08:59:54,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:54,559 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-10-28 08:59:54,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 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) [2021-10-28 08:59:54,560 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-10-28 08:59:54,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-28 08:59:54,560 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:54,560 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:54,606 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-28 08:59:54,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 08:59:54,777 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:54,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:54,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1790532757, now seen corresponding path program 1 times [2021-10-28 08:59:54,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:54,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806231501] [2021-10-28 08:59:54,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:54,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:55,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:59:55,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:55,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806231501] [2021-10-28 08:59:55,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806231501] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:55,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002862593] [2021-10-28 08:59:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:55,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:59:55,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:59:55,166 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:59:55,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 08:59:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:55,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-28 08:59:55,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:59:55,637 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 [2021-10-28 08:59:56,407 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-10-28 08:59:56,408 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 19 [2021-10-28 08:59:56,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 08:59:56,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002862593] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:56,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:59:56,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-10-28 08:59:56,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265671606] [2021-10-28 08:59:56,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 08:59:56,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:56,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 08:59:56,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2021-10-28 08:59:56,419 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 25 states have internal predecessors, (60), 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) [2021-10-28 08:59:58,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:59:58,362 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2021-10-28 08:59:58,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-28 08:59:58,362 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 25 states have internal predecessors, (60), 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 37 [2021-10-28 08:59:58,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:59:58,363 INFO L225 Difference]: With dead ends: 124 [2021-10-28 08:59:58,364 INFO L226 Difference]: Without dead ends: 63 [2021-10-28 08:59:58,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=375, Invalid=3407, Unknown=0, NotChecked=0, Total=3782 [2021-10-28 08:59:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-28 08:59:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-10-28 08:59:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 52 states have internal predecessors, (56), 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) [2021-10-28 08:59:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2021-10-28 08:59:58,370 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 37 [2021-10-28 08:59:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:59:58,370 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2021-10-28 08:59:58,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 25 states have internal predecessors, (60), 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) [2021-10-28 08:59:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2021-10-28 08:59:58,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-28 08:59:58,371 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:59:58,371 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:59:58,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:59:58,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 08:59:58,585 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 08:59:58,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:59:58,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1666823887, now seen corresponding path program 2 times [2021-10-28 08:59:58,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:59:58,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273906647] [2021-10-28 08:59:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:59:58,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:59:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:58,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:59:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:59:58,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 08:59:58,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:59:58,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273906647] [2021-10-28 08:59:58,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273906647] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:58,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101717902] [2021-10-28 08:59:58,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 08:59:58,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 08:59:58,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:59:58,845 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 08:59:58,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 08:59:59,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 08:59:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 08:59:59,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 08:59:59,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:59:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 08:59:59,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101717902] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 08:59:59,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 08:59:59,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-10-28 08:59:59,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528635891] [2021-10-28 08:59:59,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 08:59:59,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:59:59,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 08:59:59,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-10-28 08:59:59,455 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 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) [2021-10-28 09:00:00,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:00:00,029 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2021-10-28 09:00:00,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:00:00,029 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 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 45 [2021-10-28 09:00:00,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:00:00,030 INFO L225 Difference]: With dead ends: 67 [2021-10-28 09:00:00,030 INFO L226 Difference]: Without dead ends: 67 [2021-10-28 09:00:00,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:00:00,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-28 09:00:00,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2021-10-28 09:00:00,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 58 states have internal predecessors, (64), 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) [2021-10-28 09:00:00,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2021-10-28 09:00:00,034 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 45 [2021-10-28 09:00:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:00:00,035 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2021-10-28 09:00:00,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 17 states have internal predecessors, (64), 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) [2021-10-28 09:00:00,035 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2021-10-28 09:00:00,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 09:00:00,036 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:00:00,036 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-10-28 09:00:00,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:00:00,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 09:00:00,237 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:00:00,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:00:00,238 INFO L85 PathProgramCache]: Analyzing trace with hash 205044466, now seen corresponding path program 2 times [2021-10-28 09:00:00,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:00:00,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779061428] [2021-10-28 09:00:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:00:00,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:00:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:00,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:00:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:00:00,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:00:00,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779061428] [2021-10-28 09:00:00,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779061428] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:00:00,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128013122] [2021-10-28 09:00:00,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:00:00,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:00:00,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:00:00,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:00:00,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:00:00,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:00:00,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:00:00,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 09:00:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:00:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:00:01,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128013122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:00:01,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:00:01,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 20 [2021-10-28 09:00:01,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368990937] [2021-10-28 09:00:01,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 09:00:01,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:00:01,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 09:00:01,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:00:01,141 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 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) [2021-10-28 09:00:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:00:01,819 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2021-10-28 09:00:01,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:00:01,820 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 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 [2021-10-28 09:00:01,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:00:01,821 INFO L225 Difference]: With dead ends: 63 [2021-10-28 09:00:01,821 INFO L226 Difference]: Without dead ends: 63 [2021-10-28 09:00:01,823 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:00:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-28 09:00:01,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-28 09:00:01,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 58 states have internal predecessors, (63), 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) [2021-10-28 09:00:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2021-10-28 09:00:01,827 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 47 [2021-10-28 09:00:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:00:01,828 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2021-10-28 09:00:01,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 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) [2021-10-28 09:00:01,828 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2021-10-28 09:00:01,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 09:00:01,829 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:00:01,830 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:00:01,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:00:02,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 09:00:02,031 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrcmpErr5REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:00:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:00:02,031 INFO L85 PathProgramCache]: Analyzing trace with hash -520765069, now seen corresponding path program 2 times [2021-10-28 09:00:02,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:00:02,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680019966] [2021-10-28 09:00:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:00:02,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:00:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:02,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:00:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:00:02,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:00:02,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680019966] [2021-10-28 09:00:02,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680019966] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:00:02,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840749148] [2021-10-28 09:00:02,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:00:02,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:00:02,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:00:02,399 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:00:02,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:00:02,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-28 09:00:02,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:00:02,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:00:02,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:00:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-28 09:00:02,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840749148] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:00:02,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:00:02,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [12] total 14 [2021-10-28 09:00:02,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909256543] [2021-10-28 09:00:02,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:00:02,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:00:02,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:00:02,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:00:02,955 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:00:02,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:00:02,988 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2021-10-28 09:00:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:00:02,989 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-10-28 09:00:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:00:02,990 INFO L225 Difference]: With dead ends: 61 [2021-10-28 09:00:02,990 INFO L226 Difference]: Without dead ends: 61 [2021-10-28 09:00:02,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:00:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-28 09:00:02,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-10-28 09:00:02,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-10-28 09:00:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-10-28 09:00:02,996 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 49 [2021-10-28 09:00:02,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:00:02,996 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-10-28 09:00:02,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:00:02,997 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-10-28 09:00:02,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 09:00:02,997 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:00:02,998 INFO L513 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-10-28 09:00:03,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:00:03,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 09:00:03,221 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrcmpErr9REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:00:03,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:00:03,222 INFO L85 PathProgramCache]: Analyzing trace with hash 2055891520, now seen corresponding path program 2 times [2021-10-28 09:00:03,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:00:03,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766070803] [2021-10-28 09:00:03,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:00:03,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:00:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:03,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:00:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:03,644 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:00:03,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:00:03,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766070803] [2021-10-28 09:00:03,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766070803] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:00:03,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596459960] [2021-10-28 09:00:03,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:00:03,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:00:03,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:00:03,653 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:00:03,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:00:04,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-28 09:00:04,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:00:04,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:00:04,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:00:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-10-28 09:00:04,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596459960] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:00:04,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:00:04,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [14] total 17 [2021-10-28 09:00:04,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364947993] [2021-10-28 09:00:04,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:00:04,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:00:04,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:00:04,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:00:04,280 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:00:04,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:00:04,343 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-10-28 09:00:04,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:00:04,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-10-28 09:00:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:00:04,344 INFO L225 Difference]: With dead ends: 58 [2021-10-28 09:00:04,344 INFO L226 Difference]: Without dead ends: 55 [2021-10-28 09:00:04,345 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:00:04,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-28 09:00:04,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-10-28 09:00:04,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 50 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) [2021-10-28 09:00:04,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2021-10-28 09:00:04,348 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 51 [2021-10-28 09:00:04,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:00:04,348 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2021-10-28 09:00:04,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:00:04,350 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2021-10-28 09:00:04,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-28 09:00:04,350 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:00:04,351 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 09:00:04,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:00:04,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:00:04,561 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:00:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:00:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2055941249, now seen corresponding path program 3 times [2021-10-28 09:00:04,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:00:04,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48304960] [2021-10-28 09:00:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:00:04,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:00:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:04,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:00:04,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:00:04,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:00:04,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48304960] [2021-10-28 09:00:04,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48304960] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:00:04,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435519747] [2021-10-28 09:00:04,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:00:04,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:00:04,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:00:04,968 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:00:04,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:00:05,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 09:00:05,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:00:05,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-28 09:00:05,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:00:05,500 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 [2021-10-28 09:00:05,918 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 [2021-10-28 09:00:06,008 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 09:00:06,008 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 [2021-10-28 09:00:07,121 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-28 09:00:07,122 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 [2021-10-28 09:00:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:00:07,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435519747] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:00:07,133 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:00:07,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-10-28 09:00:07,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960038297] [2021-10-28 09:00:07,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 09:00:07,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:00:07,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 09:00:07,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:00:07,137 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 25 states have internal predecessors, (80), 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) [2021-10-28 09:00:28,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:00:28,364 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2021-10-28 09:00:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:00:28,368 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 25 states have internal predecessors, (80), 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 [2021-10-28 09:00:28,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:00:28,370 INFO L225 Difference]: With dead ends: 94 [2021-10-28 09:00:28,370 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 09:00:28,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-10-28 09:00:28,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 09:00:28,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2021-10-28 09:00:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 54 states have internal predecessors, (58), 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) [2021-10-28 09:00:28,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-10-28 09:00:28,375 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 51 [2021-10-28 09:00:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:00:28,375 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-10-28 09:00:28,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 25 states have internal predecessors, (80), 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) [2021-10-28 09:00:28,376 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-10-28 09:00:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 09:00:28,376 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:00:28,377 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:00:28,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:00:28,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:00:28,592 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:00:28,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:00:28,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1984837956, now seen corresponding path program 4 times [2021-10-28 09:00:28,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:00:28,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146204244] [2021-10-28 09:00:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:00:28,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:00:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:28,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:00:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-28 09:00:28,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:00:28,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146204244] [2021-10-28 09:00:28,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146204244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:00:28,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035878199] [2021-10-28 09:00:28,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:00:28,925 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:00:28,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:00:28,928 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:00:28,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:00:29,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:00:29,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:00:29,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-28 09:00:29,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:00:29,525 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:00:29,526 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 [2021-10-28 09:00:30,066 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 [2021-10-28 09:00:30,787 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 34 treesize of output 28 [2021-10-28 09:00:31,089 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-28 09:00:31,089 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 24 [2021-10-28 09:00:31,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:00:31,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035878199] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:00:31,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:00:31,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 33 [2021-10-28 09:00:31,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167491976] [2021-10-28 09:00:31,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 09:00:31,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:00:31,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 09:00:31,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 09:00:31,137 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 33 states, 32 states have (on average 2.6875) internal successors, (86), 30 states have internal predecessors, (86), 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) [2021-10-28 09:00:33,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:00:33,210 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2021-10-28 09:00:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 09:00:33,210 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.6875) internal successors, (86), 30 states have internal predecessors, (86), 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 55 [2021-10-28 09:00:33,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:00:33,211 INFO L225 Difference]: With dead ends: 96 [2021-10-28 09:00:33,211 INFO L226 Difference]: Without dead ends: 74 [2021-10-28 09:00:33,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=388, Invalid=3644, Unknown=0, NotChecked=0, Total=4032 [2021-10-28 09:00:33,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-28 09:00:33,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2021-10-28 09:00:33,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 62 states have internal predecessors, (66), 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) [2021-10-28 09:00:33,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-10-28 09:00:33,218 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 55 [2021-10-28 09:00:33,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:00:33,218 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-10-28 09:00:33,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.6875) internal successors, (86), 30 states have internal predecessors, (86), 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) [2021-10-28 09:00:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-10-28 09:00:33,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-28 09:00:33,220 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:00:33,220 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-10-28 09:00:33,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:00:33,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-28 09:00:33,445 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:00:33,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:00:33,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1240269832, now seen corresponding path program 3 times [2021-10-28 09:00:33,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:00:33,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266773224] [2021-10-28 09:00:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:00:33,446 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:00:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:34,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:00:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:34,023 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:00:34,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:00:34,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266773224] [2021-10-28 09:00:34,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266773224] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:00:34,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543956256] [2021-10-28 09:00:34,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:00:34,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:00:34,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:00:34,037 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:00:34,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:00:35,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 09:00:35,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:00:35,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 09:00:35,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:00:35,124 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:00:35,125 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 [2021-10-28 09:00:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:00:36,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543956256] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:00:36,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:00:36,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2021-10-28 09:00:36,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007037915] [2021-10-28 09:00:36,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 09:00:36,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:00:36,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 09:00:36,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:00:36,148 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 25 states have internal predecessors, (94), 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) [2021-10-28 09:00:37,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:00:37,167 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2021-10-28 09:00:37,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:00:37,168 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 25 states have internal predecessors, (94), 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 61 [2021-10-28 09:00:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:00:37,169 INFO L225 Difference]: With dead ends: 70 [2021-10-28 09:00:37,169 INFO L226 Difference]: Without dead ends: 70 [2021-10-28 09:00:37,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2021-10-28 09:00:37,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-28 09:00:37,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-10-28 09:00:37,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 64 states have internal predecessors, (68), 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) [2021-10-28 09:00:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-10-28 09:00:37,185 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 61 [2021-10-28 09:00:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:00:37,186 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-10-28 09:00:37,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 25 states have internal predecessors, (94), 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) [2021-10-28 09:00:37,187 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-10-28 09:00:37,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-28 09:00:37,192 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:00:37,192 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 09:00:37,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:00:37,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:00:37,409 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:00:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:00:37,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1003947369, now seen corresponding path program 5 times [2021-10-28 09:00:37,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:00:37,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683413540] [2021-10-28 09:00:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:00:37,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:00:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:38,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:00:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:00:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:00:38,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:00:38,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683413540] [2021-10-28 09:00:38,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683413540] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:00:38,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035955788] [2021-10-28 09:00:38,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:00:38,165 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:00:38,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:00:38,189 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:00:38,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:00:39,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-28 09:00:39,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:00:39,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-28 09:00:39,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:00:39,166 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 [2021-10-28 09:00:39,634 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 25 treesize of output 21 [2021-10-28 09:00:39,723 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-28 09:00:39,724 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 39 treesize of output 38 [2021-10-28 09:00:41,169 INFO L354 Elim1Store]: treesize reduction 41, result has 16.3 percent of original size [2021-10-28 09:00:41,170 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 46 treesize of output 34 [2021-10-28 09:00:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-28 09:00:41,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035955788] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:00:41,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:00:41,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 32 [2021-10-28 09:00:41,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427622747] [2021-10-28 09:00:41,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 09:00:41,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:00:41,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 09:00:41,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:00:41,336 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 32 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 29 states have internal predecessors, (102), 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) [2021-10-28 09:01:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:01:22,973 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2021-10-28 09:01:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 09:01:22,975 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 29 states have internal predecessors, (102), 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 65 [2021-10-28 09:01:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:01:22,976 INFO L225 Difference]: With dead ends: 126 [2021-10-28 09:01:22,976 INFO L226 Difference]: Without dead ends: 84 [2021-10-28 09:01:22,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=265, Invalid=2813, Unknown=2, NotChecked=0, Total=3080 [2021-10-28 09:01:22,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-28 09:01:22,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 77. [2021-10-28 09:01:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 72 states have internal predecessors, (76), 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) [2021-10-28 09:01:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-10-28 09:01:22,980 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 65 [2021-10-28 09:01:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:01:22,980 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-10-28 09:01:22,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.2903225806451615) internal successors, (102), 29 states have internal predecessors, (102), 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) [2021-10-28 09:01:22,988 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-10-28 09:01:22,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-28 09:01:22,992 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:01:23,000 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 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] [2021-10-28 09:01:23,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:01:23,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-28 09:01:23,217 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:01:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:01:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash -614215269, now seen corresponding path program 4 times [2021-10-28 09:01:23,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:01:23,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357383408] [2021-10-28 09:01:23,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:23,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:01:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:24,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:01:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:01:24,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:01:24,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357383408] [2021-10-28 09:01:24,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357383408] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:24,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702162939] [2021-10-28 09:01:24,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:01:24,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:01:24,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:01:24,037 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:01:24,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:01:24,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:01:24,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:01:24,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-28 09:01:24,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:01:24,660 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:01:24,661 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 [2021-10-28 09:01:25,267 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 [2021-10-28 09:01:25,914 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 34 treesize of output 28 [2021-10-28 09:01:26,204 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-10-28 09:01:26,205 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 24 [2021-10-28 09:01:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 09:01:26,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702162939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:26,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:01:26,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 43 [2021-10-28 09:01:26,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033533320] [2021-10-28 09:01:26,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-28 09:01:26,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:01:26,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-28 09:01:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1674, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 09:01:26,219 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 43 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 states have internal predecessors, (114), 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) [2021-10-28 09:01:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:01:28,430 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2021-10-28 09:01:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-28 09:01:28,432 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 states have internal predecessors, (114), 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 71 [2021-10-28 09:01:28,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:01:28,432 INFO L225 Difference]: With dead ends: 115 [2021-10-28 09:01:28,433 INFO L226 Difference]: Without dead ends: 87 [2021-10-28 09:01:28,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=413, Invalid=4557, Unknown=0, NotChecked=0, Total=4970 [2021-10-28 09:01:28,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-28 09:01:28,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2021-10-28 09:01:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 76 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) [2021-10-28 09:01:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2021-10-28 09:01:28,439 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 71 [2021-10-28 09:01:28,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:01:28,440 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2021-10-28 09:01:28,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 40 states have internal predecessors, (114), 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) [2021-10-28 09:01:28,440 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2021-10-28 09:01:28,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-28 09:01:28,441 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:01:28,442 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2021-10-28 09:01:28,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:01:28,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-28 09:01:28,665 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:01:28,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:01:28,665 INFO L85 PathProgramCache]: Analyzing trace with hash 746041886, now seen corresponding path program 5 times [2021-10-28 09:01:28,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:01:28,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698030136] [2021-10-28 09:01:28,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:28,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:01:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:29,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:01:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 09:01:29,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:01:29,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698030136] [2021-10-28 09:01:29,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698030136] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:29,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560519250] [2021-10-28 09:01:29,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:01:29,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:01:29,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:01:29,109 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:01:29,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:01:29,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-28 09:01:29,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:01:29,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-28 09:01:29,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:01:29,836 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:01:29,836 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 [2021-10-28 09:01:30,687 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 09:01:30,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560519250] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:30,688 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:01:30,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 31 [2021-10-28 09:01:30,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070022703] [2021-10-28 09:01:30,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 09:01:30,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:01:30,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 09:01:30,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:01:30,691 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 32 states, 30 states have (on average 3.8) internal successors, (114), 29 states have internal predecessors, (114), 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) [2021-10-28 09:01:31,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:01:31,317 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2021-10-28 09:01:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:01:31,321 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 3.8) internal successors, (114), 29 states have internal predecessors, (114), 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 75 [2021-10-28 09:01:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:01:31,322 INFO L225 Difference]: With dead ends: 84 [2021-10-28 09:01:31,323 INFO L226 Difference]: Without dead ends: 84 [2021-10-28 09:01:31,323 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 09:01:31,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-28 09:01:31,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-10-28 09:01:31,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 78 states have internal predecessors, (82), 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) [2021-10-28 09:01:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2021-10-28 09:01:31,327 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 75 [2021-10-28 09:01:31,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:01:31,327 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2021-10-28 09:01:31,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 3.8) internal successors, (114), 29 states have internal predecessors, (114), 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) [2021-10-28 09:01:31,328 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2021-10-28 09:01:31,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-28 09:01:31,329 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:01:31,329 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-10-28 09:01:31,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:01:31,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:01:31,545 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrcmpErr1REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:01:31,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:01:31,545 INFO L85 PathProgramCache]: Analyzing trace with hash -421352019, now seen corresponding path program 6 times [2021-10-28 09:01:31,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:01:31,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115593379] [2021-10-28 09:01:31,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:31,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:01:31,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:31,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:01:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-28 09:01:31,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:01:31,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115593379] [2021-10-28 09:01:31,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115593379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:31,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034141194] [2021-10-28 09:01:31,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:01:31,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:01:31,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:01:31,969 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:01:32,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:01:32,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-28 09:01:32,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:01:32,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 09:01:32,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:01:32,947 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:01:32,948 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 [2021-10-28 09:01:32,959 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 [2021-10-28 09:01:33,483 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 23 treesize of output 19 [2021-10-28 09:01:33,558 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-28 09:01:33,559 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 39 treesize of output 38 [2021-10-28 09:01:34,663 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-10-28 09:01:34,663 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 44 treesize of output 32 [2021-10-28 09:01:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-10-28 09:01:34,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034141194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:34,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:01:34,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9] total 28 [2021-10-28 09:01:34,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140328431] [2021-10-28 09:01:34,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 09:01:34,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:01:34,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 09:01:34,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:01:34,746 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 28 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 25 states have internal predecessors, (89), 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) [2021-10-28 09:01:47,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:01:47,849 INFO L93 Difference]: Finished difference Result 141 states and 145 transitions. [2021-10-28 09:01:47,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-28 09:01:47,850 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 25 states have internal predecessors, (89), 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 79 [2021-10-28 09:01:47,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:01:47,851 INFO L225 Difference]: With dead ends: 141 [2021-10-28 09:01:47,851 INFO L226 Difference]: Without dead ends: 89 [2021-10-28 09:01:47,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=367, Invalid=3173, Unknown=0, NotChecked=0, Total=3540 [2021-10-28 09:01:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-28 09:01:47,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2021-10-28 09:01:47,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 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) [2021-10-28 09:01:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2021-10-28 09:01:47,856 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 79 [2021-10-28 09:01:47,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:01:47,856 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2021-10-28 09:01:47,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.2962962962962963) internal successors, (89), 25 states have internal predecessors, (89), 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) [2021-10-28 09:01:47,857 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2021-10-28 09:01:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-28 09:01:47,857 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:01:47,858 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 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] [2021-10-28 09:01:47,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:01:48,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:01:48,061 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:01:48,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:01:48,061 INFO L85 PathProgramCache]: Analyzing trace with hash -735803919, now seen corresponding path program 6 times [2021-10-28 09:01:48,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:01:48,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374859798] [2021-10-28 09:01:48,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:48,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:01:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:49,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:01:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:01:49,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:01:49,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374859798] [2021-10-28 09:01:49,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374859798] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:49,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983760852] [2021-10-28 09:01:49,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:01:49,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:01:49,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:01:49,296 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:01:49,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:01:50,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-28 09:01:50,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:01:50,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 89 conjunts are in the unsatisfiable core [2021-10-28 09:01:50,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:01:50,567 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 [2021-10-28 09:01:51,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:01:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 88 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 09:01:51,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983760852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:51,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:01:51,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 21] total 40 [2021-10-28 09:01:51,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838897362] [2021-10-28 09:01:51,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 09:01:51,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:01:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 09:01:51,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1453, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 09:01:51,023 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 40 states, 38 states have (on average 3.0) internal successors, (114), 37 states have internal predecessors, (114), 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) [2021-10-28 09:01:53,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:01:53,179 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2021-10-28 09:01:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-28 09:01:53,179 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 3.0) internal successors, (114), 37 states have internal predecessors, (114), 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 85 [2021-10-28 09:01:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:01:53,180 INFO L225 Difference]: With dead ends: 130 [2021-10-28 09:01:53,180 INFO L226 Difference]: Without dead ends: 96 [2021-10-28 09:01:53,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=286, Invalid=3620, Unknown=0, NotChecked=0, Total=3906 [2021-10-28 09:01:53,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-28 09:01:53,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-10-28 09:01:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 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) [2021-10-28 09:01:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2021-10-28 09:01:53,189 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 85 [2021-10-28 09:01:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:01:53,190 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2021-10-28 09:01:53,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 3.0) internal successors, (114), 37 states have internal predecessors, (114), 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) [2021-10-28 09:01:53,190 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2021-10-28 09:01:53,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-28 09:01:53,191 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:01:53,192 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 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] [2021-10-28 09:01:53,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 09:01:53,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-28 09:01:53,401 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:01:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:01:53,402 INFO L85 PathProgramCache]: Analyzing trace with hash 650863924, now seen corresponding path program 7 times [2021-10-28 09:01:53,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:01:53,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879057271] [2021-10-28 09:01:53,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:53,410 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:01:53,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:53,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:01:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:53,987 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 09:01:53,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:01:53,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879057271] [2021-10-28 09:01:53,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879057271] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:53,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944501461] [2021-10-28 09:01:53,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:01:53,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:01:53,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:01:53,989 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:01:53,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:01:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:54,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-28 09:01:54,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:01:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 09:01:55,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944501461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:55,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:01:55,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 29 [2021-10-28 09:01:55,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911032451] [2021-10-28 09:01:55,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 09:01:55,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:01:55,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 09:01:55,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=769, Unknown=0, NotChecked=0, Total=870 [2021-10-28 09:01:55,355 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 30 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 27 states have internal predecessors, (104), 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) [2021-10-28 09:01:56,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:01:56,274 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2021-10-28 09:01:56,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 09:01:56,274 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 27 states have internal predecessors, (104), 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 89 [2021-10-28 09:01:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:01:56,275 INFO L225 Difference]: With dead ends: 97 [2021-10-28 09:01:56,275 INFO L226 Difference]: Without dead ends: 97 [2021-10-28 09:01:56,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=1378, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 09:01:56,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-28 09:01:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2021-10-28 09:01:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 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) [2021-10-28 09:01:56,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2021-10-28 09:01:56,280 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 89 [2021-10-28 09:01:56,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:01:56,280 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2021-10-28 09:01:56,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 27 states have internal predecessors, (104), 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) [2021-10-28 09:01:56,281 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2021-10-28 09:01:56,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-28 09:01:56,281 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:01:56,282 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 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] [2021-10-28 09:01:56,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:01:56,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:01:56,482 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:01:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:01:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash -264733948, now seen corresponding path program 8 times [2021-10-28 09:01:56,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:01:56,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978046872] [2021-10-28 09:01:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:01:56,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:01:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:57,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:01:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:01:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 82 proven. 71 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 09:01:57,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:01:57,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978046872] [2021-10-28 09:01:57,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978046872] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:57,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881725254] [2021-10-28 09:01:57,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:01:57,108 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:01:57,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:01:57,113 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:01:57,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:01:58,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:01:58,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:01:58,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-28 09:01:58,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:01:58,320 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:01:58,321 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 [2021-10-28 09:01:58,323 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 [2021-10-28 09:01:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 103 proven. 50 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-28 09:01:59,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881725254] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:01:59,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:01:59,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 37 [2021-10-28 09:01:59,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88435529] [2021-10-28 09:01:59,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 09:01:59,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:01:59,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 09:01:59,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 09:01:59,171 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 37 states, 37 states have (on average 3.891891891891892) internal successors, (144), 34 states have internal predecessors, (144), 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) [2021-10-28 09:01:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:01:59,983 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2021-10-28 09:01:59,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 09:01:59,984 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.891891891891892) internal successors, (144), 34 states have internal predecessors, (144), 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 95 [2021-10-28 09:01:59,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:01:59,985 INFO L225 Difference]: With dead ends: 166 [2021-10-28 09:01:59,985 INFO L226 Difference]: Without dead ends: 103 [2021-10-28 09:01:59,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=434, Invalid=2218, Unknown=0, NotChecked=0, Total=2652 [2021-10-28 09:01:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-28 09:01:59,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-10-28 09:01:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 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) [2021-10-28 09:01:59,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2021-10-28 09:01:59,991 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 95 [2021-10-28 09:01:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:01:59,991 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2021-10-28 09:01:59,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.891891891891892) internal successors, (144), 34 states have internal predecessors, (144), 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) [2021-10-28 09:01:59,991 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2021-10-28 09:01:59,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-28 09:01:59,995 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:01:59,996 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:02:00,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:02:00,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-28 09:02:00,209 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:02:00,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:02:00,209 INFO L85 PathProgramCache]: Analyzing trace with hash -452087993, now seen corresponding path program 9 times [2021-10-28 09:02:00,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:02:00,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503543299] [2021-10-28 09:02:00,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:02:00,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:02:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:01,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:02:01,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:01,415 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:02:01,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:02:01,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503543299] [2021-10-28 09:02:01,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503543299] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:01,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94105554] [2021-10-28 09:02:01,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:02:01,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:02:01,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:02:01,418 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:02:01,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:02:02,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-28 09:02:02,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:02:02,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 143 conjunts are in the unsatisfiable core [2021-10-28 09:02:02,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:02:02,949 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:02:02,949 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 [2021-10-28 09:02:02,959 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 [2021-10-28 09:02:05,095 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 16 treesize of output 12 [2021-10-28 09:02:05,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:02:05,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-28 09:02:07,752 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:02:07,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2021-10-28 09:02:08,167 INFO L354 Elim1Store]: treesize reduction 74, result has 3.9 percent of original size [2021-10-28 09:02:08,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 43 [2021-10-28 09:02:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:02:08,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94105554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:08,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:02:08,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 38] total 67 [2021-10-28 09:02:08,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008282416] [2021-10-28 09:02:08,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-10-28 09:02:08,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:02:08,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-10-28 09:02:08,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4214, Unknown=0, NotChecked=0, Total=4422 [2021-10-28 09:02:08,190 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 67 states, 65 states have (on average 2.8) internal successors, (182), 64 states have internal predecessors, (182), 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) [2021-10-28 09:02:15,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:02:15,254 INFO L93 Difference]: Finished difference Result 223 states and 228 transitions. [2021-10-28 09:02:15,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-10-28 09:02:15,255 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 65 states have (on average 2.8) internal successors, (182), 64 states have internal predecessors, (182), 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 [2021-10-28 09:02:15,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:02:15,256 INFO L225 Difference]: With dead ends: 223 [2021-10-28 09:02:15,256 INFO L226 Difference]: Without dead ends: 143 [2021-10-28 09:02:15,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4105 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=770, Invalid=13992, Unknown=0, NotChecked=0, Total=14762 [2021-10-28 09:02:15,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-28 09:02:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2021-10-28 09:02:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 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) [2021-10-28 09:02:15,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2021-10-28 09:02:15,263 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 99 [2021-10-28 09:02:15,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:02:15,263 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2021-10-28 09:02:15,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 65 states have (on average 2.8) internal successors, (182), 64 states have internal predecessors, (182), 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) [2021-10-28 09:02:15,264 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2021-10-28 09:02:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-28 09:02:15,265 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:02:15,265 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 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] [2021-10-28 09:02:15,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:02:15,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-10-28 09:02:15,489 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:02:15,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:02:15,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1035648330, now seen corresponding path program 10 times [2021-10-28 09:02:15,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:02:15,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154181505] [2021-10-28 09:02:15,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:02:15,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:02:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:16,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:02:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-28 09:02:16,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:02:16,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154181505] [2021-10-28 09:02:16,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154181505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:16,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106360623] [2021-10-28 09:02:16,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:02:16,292 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:02:16,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:02:16,293 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:02:16,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 09:02:17,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:02:17,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:02:17,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 139 conjunts are in the unsatisfiable core [2021-10-28 09:02:17,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:02:17,477 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:02:17,477 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 [2021-10-28 09:02:18,414 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 16 treesize of output 12 [2021-10-28 09:02:19,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 09:02:19,957 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-10-28 09:02:19,957 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 32 treesize of output 20 [2021-10-28 09:02:20,169 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 50 proven. 124 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-28 09:02:20,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106360623] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:20,170 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:02:20,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30] total 50 [2021-10-28 09:02:20,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285724270] [2021-10-28 09:02:20,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 09:02:20,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:02:20,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 09:02:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2383, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 09:02:20,172 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 51 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 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) [2021-10-28 09:02:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:02:23,153 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2021-10-28 09:02:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 09:02:23,159 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 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 103 [2021-10-28 09:02:23,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:02:23,160 INFO L225 Difference]: With dead ends: 111 [2021-10-28 09:02:23,160 INFO L226 Difference]: Without dead ends: 111 [2021-10-28 09:02:23,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=403, Invalid=4999, Unknown=0, NotChecked=0, Total=5402 [2021-10-28 09:02:23,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-28 09:02:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-10-28 09:02:23,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 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) [2021-10-28 09:02:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2021-10-28 09:02:23,163 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 103 [2021-10-28 09:02:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:02:23,163 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2021-10-28 09:02:23,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 3.2083333333333335) internal successors, (154), 48 states have internal predecessors, (154), 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) [2021-10-28 09:02:23,164 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2021-10-28 09:02:23,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-10-28 09:02:23,165 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:02:23,165 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 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] [2021-10-28 09:02:23,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:02:23,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:02:23,381 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:02:23,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:02:23,381 INFO L85 PathProgramCache]: Analyzing trace with hash -2012288358, now seen corresponding path program 11 times [2021-10-28 09:02:23,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:02:23,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126060240] [2021-10-28 09:02:23,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:02:23,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:02:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:23,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:02:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:23,939 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 116 proven. 97 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-28 09:02:23,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:02:23,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126060240] [2021-10-28 09:02:23,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126060240] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:23,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590174230] [2021-10-28 09:02:23,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:02:23,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:02:23,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:02:23,945 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:02:23,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 09:02:25,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-28 09:02:25,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:02:25,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-28 09:02:25,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:02:25,664 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:02:25,664 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 [2021-10-28 09:02:25,667 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 [2021-10-28 09:02:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 141 proven. 72 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-10-28 09:02:26,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590174230] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:26,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:02:26,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2021-10-28 09:02:26,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194404645] [2021-10-28 09:02:26,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 09:02:26,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:02:26,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 09:02:26,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 09:02:26,641 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 41 states, 41 states have (on average 4.0) internal successors, (164), 38 states have internal predecessors, (164), 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) [2021-10-28 09:02:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:02:27,591 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2021-10-28 09:02:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 09:02:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.0) internal successors, (164), 38 states have internal predecessors, (164), 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 109 [2021-10-28 09:02:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:02:27,593 INFO L225 Difference]: With dead ends: 190 [2021-10-28 09:02:27,593 INFO L226 Difference]: Without dead ends: 117 [2021-10-28 09:02:27,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=543, Invalid=2763, Unknown=0, NotChecked=0, Total=3306 [2021-10-28 09:02:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-28 09:02:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2021-10-28 09:02:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.036697247706422) internal successors, (113), 109 states have internal predecessors, (113), 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) [2021-10-28 09:02:27,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2021-10-28 09:02:27,598 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 109 [2021-10-28 09:02:27,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:02:27,598 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2021-10-28 09:02:27,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.0) internal successors, (164), 38 states have internal predecessors, (164), 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) [2021-10-28 09:02:27,598 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2021-10-28 09:02:27,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-10-28 09:02:27,599 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:02:27,600 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:02:27,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:02:27,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:02:27,825 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:02:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:02:27,825 INFO L85 PathProgramCache]: Analyzing trace with hash -98177635, now seen corresponding path program 12 times [2021-10-28 09:02:27,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:02:27,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929186434] [2021-10-28 09:02:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:02:27,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:02:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:29,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:02:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:02:29,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:02:29,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929186434] [2021-10-28 09:02:29,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929186434] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:29,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13973994] [2021-10-28 09:02:29,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:02:29,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:02:29,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:02:29,235 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:02:29,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 09:02:31,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-28 09:02:31,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:02:31,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 91 conjunts are in the unsatisfiable core [2021-10-28 09:02:31,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:02:31,493 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 [2021-10-28 09:02:32,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:02:32,110 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 21 proven. 192 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-28 09:02:32,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13973994] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:32,110 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:02:32,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 25] total 48 [2021-10-28 09:02:32,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972253196] [2021-10-28 09:02:32,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-28 09:02:32,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:02:32,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-28 09:02:32,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2127, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 09:02:32,114 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 48 states, 46 states have (on average 3.260869565217391) internal successors, (150), 45 states have internal predecessors, (150), 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) [2021-10-28 09:02:35,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:02:35,112 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2021-10-28 09:02:35,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-28 09:02:35,112 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 3.260869565217391) internal successors, (150), 45 states have internal predecessors, (150), 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 113 [2021-10-28 09:02:35,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:02:35,113 INFO L225 Difference]: With dead ends: 170 [2021-10-28 09:02:35,114 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 09:02:35,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=352, Invalid=5500, Unknown=0, NotChecked=0, Total=5852 [2021-10-28 09:02:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 09:02:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2021-10-28 09:02:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 113 states have internal predecessors, (117), 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) [2021-10-28 09:02:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2021-10-28 09:02:35,119 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 113 [2021-10-28 09:02:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:02:35,119 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2021-10-28 09:02:35,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 3.260869565217391) internal successors, (150), 45 states have internal predecessors, (150), 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) [2021-10-28 09:02:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2021-10-28 09:02:35,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-28 09:02:35,120 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:02:35,121 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 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] [2021-10-28 09:02:35,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 09:02:35,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-28 09:02:35,345 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:02:35,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:02:35,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1510450592, now seen corresponding path program 13 times [2021-10-28 09:02:35,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:02:35,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701334093] [2021-10-28 09:02:35,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:02:35,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:02:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:35,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:02:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:36,003 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 45 proven. 193 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-28 09:02:36,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:02:36,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701334093] [2021-10-28 09:02:36,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701334093] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:36,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157632088] [2021-10-28 09:02:36,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:02:36,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:02:36,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:02:36,005 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:02:36,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-28 09:02:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:37,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-28 09:02:37,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:02:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 66 proven. 172 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-28 09:02:38,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157632088] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:38,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:02:38,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 35 [2021-10-28 09:02:38,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415706319] [2021-10-28 09:02:38,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-28 09:02:38,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:02:38,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-28 09:02:38,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 09:02:38,086 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 36 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 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) [2021-10-28 09:02:38,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:02:38,967 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2021-10-28 09:02:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 09:02:38,968 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 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 117 [2021-10-28 09:02:38,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:02:38,971 INFO L225 Difference]: With dead ends: 125 [2021-10-28 09:02:38,971 INFO L226 Difference]: Without dead ends: 125 [2021-10-28 09:02:38,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=2009, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 09:02:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-28 09:02:38,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-10-28 09:02:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 119 states have internal predecessors, (123), 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) [2021-10-28 09:02:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2021-10-28 09:02:38,975 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 117 [2021-10-28 09:02:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:02:38,975 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2021-10-28 09:02:38,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 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) [2021-10-28 09:02:38,976 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2021-10-28 09:02:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-28 09:02:38,977 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:02:38,977 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 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] [2021-10-28 09:02:39,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-28 09:02:39,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:02:39,193 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:02:39,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:02:39,193 INFO L85 PathProgramCache]: Analyzing trace with hash -861151440, now seen corresponding path program 14 times [2021-10-28 09:02:39,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:02:39,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694995839] [2021-10-28 09:02:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:02:39,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:02:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:39,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:02:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:39,744 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 156 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-28 09:02:39,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:02:39,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694995839] [2021-10-28 09:02:39,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694995839] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:39,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081124676] [2021-10-28 09:02:39,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:02:39,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:02:39,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:02:39,746 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:02:39,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-28 09:02:41,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:02:41,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:02:41,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-28 09:02:41,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:02:41,254 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:02:41,254 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 [2021-10-28 09:02:41,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-28 09:02:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 185 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-28 09:02:42,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081124676] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:42,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:02:42,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 44 [2021-10-28 09:02:42,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654729664] [2021-10-28 09:02:42,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-28 09:02:42,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:02:42,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-28 09:02:42,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1608, Unknown=0, NotChecked=0, Total=1892 [2021-10-28 09:02:42,424 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 44 states, 44 states have (on average 4.181818181818182) internal successors, (184), 41 states have internal predecessors, (184), 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) [2021-10-28 09:02:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:02:43,597 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2021-10-28 09:02:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 09:02:43,598 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.181818181818182) internal successors, (184), 41 states have internal predecessors, (184), 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 123 [2021-10-28 09:02:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:02:43,599 INFO L225 Difference]: With dead ends: 214 [2021-10-28 09:02:43,600 INFO L226 Difference]: Without dead ends: 131 [2021-10-28 09:02:43,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=654, Invalid=3252, Unknown=0, NotChecked=0, Total=3906 [2021-10-28 09:02:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-28 09:02:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2021-10-28 09:02:43,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.032520325203252) internal successors, (127), 123 states have internal predecessors, (127), 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) [2021-10-28 09:02:43,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2021-10-28 09:02:43,605 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 123 [2021-10-28 09:02:43,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:02:43,606 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2021-10-28 09:02:43,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.181818181818182) internal successors, (184), 41 states have internal predecessors, (184), 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) [2021-10-28 09:02:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2021-10-28 09:02:43,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-10-28 09:02:43,607 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:02:43,608 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:02:43,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-28 09:02:43,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-28 09:02:43,833 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:02:43,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:02:43,833 INFO L85 PathProgramCache]: Analyzing trace with hash -363601677, now seen corresponding path program 15 times [2021-10-28 09:02:43,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:02:43,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498796584] [2021-10-28 09:02:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:02:43,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:02:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:45,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:02:45,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:02:45,820 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 24 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:02:45,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:02:45,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498796584] [2021-10-28 09:02:45,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498796584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:45,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201201187] [2021-10-28 09:02:45,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:02:45,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:02:45,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:02:45,832 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:02:45,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-28 09:02:47,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-28 09:02:47,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:02:47,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 124 conjunts are in the unsatisfiable core [2021-10-28 09:02:47,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:02:47,737 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:02:47,737 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 [2021-10-28 09:02:48,647 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 16 treesize of output 12 [2021-10-28 09:02:50,158 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-10-28 09:02:50,158 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 32 treesize of output 36 [2021-10-28 09:02:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 66 proven. 217 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-28 09:02:50,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201201187] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:02:50,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:02:50,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 27] total 64 [2021-10-28 09:02:50,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073450677] [2021-10-28 09:02:50,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-10-28 09:02:50,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:02:50,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-10-28 09:02:50,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=3817, Unknown=0, NotChecked=0, Total=4032 [2021-10-28 09:02:50,414 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 64 states, 62 states have (on average 3.4516129032258065) internal successors, (214), 61 states have internal predecessors, (214), 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) [2021-10-28 09:03:02,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:02,308 INFO L93 Difference]: Finished difference Result 194 states and 197 transitions. [2021-10-28 09:03:02,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-10-28 09:03:02,308 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 3.4516129032258065) internal successors, (214), 61 states have internal predecessors, (214), 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 127 [2021-10-28 09:03:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:02,310 INFO L225 Difference]: With dead ends: 194 [2021-10-28 09:03:02,310 INFO L226 Difference]: Without dead ends: 142 [2021-10-28 09:03:02,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9423 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=2550, Invalid=29312, Unknown=0, NotChecked=0, Total=31862 [2021-10-28 09:03:02,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-28 09:03:02,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2021-10-28 09:03:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 133 states have internal predecessors, (137), 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) [2021-10-28 09:03:02,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2021-10-28 09:03:02,318 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 127 [2021-10-28 09:03:02,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:02,318 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2021-10-28 09:03:02,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 3.4516129032258065) internal successors, (214), 61 states have internal predecessors, (214), 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) [2021-10-28 09:03:02,319 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2021-10-28 09:03:02,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-10-28 09:03:02,320 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:02,320 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 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] [2021-10-28 09:03:02,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:02,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-28 09:03:02,537 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:03:02,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:02,537 INFO L85 PathProgramCache]: Analyzing trace with hash -265684794, now seen corresponding path program 16 times [2021-10-28 09:03:02,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:02,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81093040] [2021-10-28 09:03:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:02,538 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:03,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:03,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 202 proven. 161 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-28 09:03:03,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:03,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81093040] [2021-10-28 09:03:03,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81093040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:03,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901134860] [2021-10-28 09:03:03,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:03:03,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:03,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:03,317 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:03:03,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-28 09:03:05,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:03:05,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:03:05,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 76 conjunts are in the unsatisfiable core [2021-10-28 09:03:05,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:05,093 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:03:05,093 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 [2021-10-28 09:03:05,095 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 [2021-10-28 09:03:06,236 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 235 proven. 128 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-10-28 09:03:06,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901134860] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:06,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:03:06,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 24] total 49 [2021-10-28 09:03:06,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283550265] [2021-10-28 09:03:06,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-28 09:03:06,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:06,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-28 09:03:06,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=1998, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 09:03:06,239 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 49 states, 49 states have (on average 4.163265306122449) internal successors, (204), 46 states have internal predecessors, (204), 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) [2021-10-28 09:03:07,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:07,286 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2021-10-28 09:03:07,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-28 09:03:07,286 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.163265306122449) internal successors, (204), 46 states have internal predecessors, (204), 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 [2021-10-28 09:03:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:07,287 INFO L225 Difference]: With dead ends: 238 [2021-10-28 09:03:07,287 INFO L226 Difference]: Without dead ends: 145 [2021-10-28 09:03:07,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=800, Invalid=4030, Unknown=0, NotChecked=0, Total=4830 [2021-10-28 09:03:07,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-28 09:03:07,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2021-10-28 09:03:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 137 states have internal predecessors, (141), 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) [2021-10-28 09:03:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2021-10-28 09:03:07,293 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 137 [2021-10-28 09:03:07,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:07,293 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2021-10-28 09:03:07,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.163265306122449) internal successors, (204), 46 states have internal predecessors, (204), 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) [2021-10-28 09:03:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2021-10-28 09:03:07,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-10-28 09:03:07,295 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:07,295 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:07,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:07,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:07,509 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:03:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:07,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1432234313, now seen corresponding path program 17 times [2021-10-28 09:03:07,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:07,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443704818] [2021-10-28 09:03:07,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:07,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:09,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 27 proven. 489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:03:09,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:09,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443704818] [2021-10-28 09:03:09,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443704818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:09,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40500752] [2021-10-28 09:03:09,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:03:09,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:09,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:09,278 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:03:09,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-28 09:03:11,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-28 09:03:11,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:03:11,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 207 conjunts are in the unsatisfiable core [2021-10-28 09:03:11,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:11,319 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:03:11,320 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 [2021-10-28 09:03:12,801 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 16 treesize of output 12 [2021-10-28 09:03:14,327 INFO L354 Elim1Store]: treesize reduction 14, result has 65.9 percent of original size [2021-10-28 09:03:14,327 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 30 treesize of output 36 [2021-10-28 09:03:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 91 proven. 424 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:03:14,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40500752] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:14,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:03:14,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 37] total 77 [2021-10-28 09:03:14,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812675228] [2021-10-28 09:03:14,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-10-28 09:03:14,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:14,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-10-28 09:03:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=5620, Unknown=0, NotChecked=0, Total=5852 [2021-10-28 09:03:14,615 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 77 states, 75 states have (on average 3.6) internal successors, (270), 74 states have internal predecessors, (270), 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) [2021-10-28 09:03:21,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:21,748 INFO L93 Difference]: Finished difference Result 214 states and 217 transitions. [2021-10-28 09:03:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-10-28 09:03:21,748 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 3.6) internal successors, (270), 74 states have internal predecessors, (270), 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 141 [2021-10-28 09:03:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:21,750 INFO L225 Difference]: With dead ends: 214 [2021-10-28 09:03:21,750 INFO L226 Difference]: Without dead ends: 156 [2021-10-28 09:03:21,752 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4074 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=939, Invalid=19083, Unknown=0, NotChecked=0, Total=20022 [2021-10-28 09:03:21,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-28 09:03:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2021-10-28 09:03:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 147 states have internal predecessors, (151), 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) [2021-10-28 09:03:21,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2021-10-28 09:03:21,756 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 141 [2021-10-28 09:03:21,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:21,756 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2021-10-28 09:03:21,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 3.6) internal successors, (270), 74 states have internal predecessors, (270), 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) [2021-10-28 09:03:21,757 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2021-10-28 09:03:21,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-10-28 09:03:21,758 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:21,758 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 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] [2021-10-28 09:03:21,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:21,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-28 09:03:21,973 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:03:21,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:21,973 INFO L85 PathProgramCache]: Analyzing trace with hash 679728988, now seen corresponding path program 18 times [2021-10-28 09:03:21,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:21,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197490170] [2021-10-28 09:03:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:21,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:22,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 254 proven. 199 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-10-28 09:03:22,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:22,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197490170] [2021-10-28 09:03:22,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197490170] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:22,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225416448] [2021-10-28 09:03:22,658 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:03:22,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:22,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:22,659 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:03:22,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-28 09:03:25,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-28 09:03:25,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:03:25,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 100 conjunts are in the unsatisfiable core [2021-10-28 09:03:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:25,574 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:03:25,574 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 [2021-10-28 09:03:29,466 INFO L134 CoverageAnalysis]: Checked inductivity of 606 backedges. 300 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:03:29,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225416448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:29,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:03:29,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 36] total 63 [2021-10-28 09:03:29,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695561146] [2021-10-28 09:03:29,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-10-28 09:03:29,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:29,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-10-28 09:03:29,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=3467, Unknown=0, NotChecked=0, Total=3906 [2021-10-28 09:03:29,469 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 63 states, 63 states have (on average 4.063492063492063) internal successors, (256), 60 states have internal predecessors, (256), 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) [2021-10-28 09:03:31,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:31,659 INFO L93 Difference]: Finished difference Result 272 states and 277 transitions. [2021-10-28 09:03:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 09:03:31,660 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.063492063492063) internal successors, (256), 60 states have internal predecessors, (256), 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 151 [2021-10-28 09:03:31,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:31,661 INFO L225 Difference]: With dead ends: 272 [2021-10-28 09:03:31,661 INFO L226 Difference]: Without dead ends: 159 [2021-10-28 09:03:31,662 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1110, Invalid=8396, Unknown=0, NotChecked=0, Total=9506 [2021-10-28 09:03:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-28 09:03:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2021-10-28 09:03:31,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 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) [2021-10-28 09:03:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2021-10-28 09:03:31,666 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 151 [2021-10-28 09:03:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:31,666 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2021-10-28 09:03:31,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.063492063492063) internal successors, (256), 60 states have internal predecessors, (256), 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) [2021-10-28 09:03:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2021-10-28 09:03:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-10-28 09:03:31,667 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:31,668 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:31,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:31,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-28 09:03:31,889 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:03:31,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:31,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2115279201, now seen corresponding path program 19 times [2021-10-28 09:03:31,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:31,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283423478] [2021-10-28 09:03:31,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:31,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:33,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 30 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:03:33,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:33,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283423478] [2021-10-28 09:03:33,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283423478] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:33,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026313795] [2021-10-28 09:03:33,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:03:33,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:33,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:33,766 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:03:33,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-28 09:03:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:35,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 221 conjunts are in the unsatisfiable core [2021-10-28 09:03:35,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:37,067 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 [2021-10-28 09:03:40,883 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-10-28 09:03:40,883 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 46 treesize of output 30 [2021-10-28 09:03:40,893 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 30 proven. 612 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:03:40,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026313795] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:40,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:03:40,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 42] total 83 [2021-10-28 09:03:40,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712419142] [2021-10-28 09:03:40,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-10-28 09:03:40,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:40,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-10-28 09:03:40,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=6529, Unknown=0, NotChecked=0, Total=6806 [2021-10-28 09:03:40,895 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 83 states, 81 states have (on average 3.6296296296296298) internal successors, (294), 80 states have internal predecessors, (294), 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) [2021-10-28 09:03:46,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:46,847 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2021-10-28 09:03:46,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 09:03:46,847 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 81 states have (on average 3.6296296296296298) internal successors, (294), 80 states have internal predecessors, (294), 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 155 [2021-10-28 09:03:46,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:46,849 INFO L225 Difference]: With dead ends: 230 [2021-10-28 09:03:46,849 INFO L226 Difference]: Without dead ends: 166 [2021-10-28 09:03:46,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=604, Invalid=13916, Unknown=0, NotChecked=0, Total=14520 [2021-10-28 09:03:46,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-28 09:03:46,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-10-28 09:03:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 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) [2021-10-28 09:03:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2021-10-28 09:03:46,856 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 155 [2021-10-28 09:03:46,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:46,856 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2021-10-28 09:03:46,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 81 states have (on average 3.6296296296296298) internal successors, (294), 80 states have internal predecessors, (294), 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) [2021-10-28 09:03:46,857 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2021-10-28 09:03:46,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-10-28 09:03:46,858 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:46,858 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 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] [2021-10-28 09:03:46,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:47,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:47,085 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:03:47,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:47,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1717497950, now seen corresponding path program 20 times [2021-10-28 09:03:47,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:47,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008637128] [2021-10-28 09:03:47,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:47,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:48,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 120 proven. 370 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-28 09:03:48,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:48,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008637128] [2021-10-28 09:03:48,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008637128] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:48,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29301310] [2021-10-28 09:03:48,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:03:48,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:48,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:48,472 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:03:48,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-28 09:03:50,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:03:50,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:03:50,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 107 conjunts are in the unsatisfiable core [2021-10-28 09:03:50,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:50,863 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:03:50,863 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 [2021-10-28 09:03:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 153 proven. 337 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-28 09:03:52,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29301310] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:52,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:03:52,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 55 [2021-10-28 09:03:52,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364077949] [2021-10-28 09:03:52,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-28 09:03:52,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:52,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-28 09:03:52,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2785, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 09:03:52,718 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 56 states, 54 states have (on average 4.333333333333333) internal successors, (234), 53 states have internal predecessors, (234), 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) [2021-10-28 09:03:54,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:54,341 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2021-10-28 09:03:54,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-28 09:03:54,342 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 4.333333333333333) internal successors, (234), 53 states have internal predecessors, (234), 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 [2021-10-28 09:03:54,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:54,343 INFO L225 Difference]: With dead ends: 167 [2021-10-28 09:03:54,343 INFO L226 Difference]: Without dead ends: 167 [2021-10-28 09:03:54,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1604 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=433, Invalid=4537, Unknown=0, NotChecked=0, Total=4970 [2021-10-28 09:03:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-10-28 09:03:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2021-10-28 09:03:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0248447204968945) internal successors, (165), 161 states have internal predecessors, (165), 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) [2021-10-28 09:03:54,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 169 transitions. [2021-10-28 09:03:54,349 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 169 transitions. Word has length 159 [2021-10-28 09:03:54,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:54,350 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 169 transitions. [2021-10-28 09:03:54,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 4.333333333333333) internal successors, (234), 53 states have internal predecessors, (234), 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) [2021-10-28 09:03:54,350 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 169 transitions. [2021-10-28 09:03:54,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-10-28 09:03:54,351 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:54,352 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 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] [2021-10-28 09:03:54,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:54,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:54,575 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrcmpErr3REQUIRES_VIOLATION === [cstrcmpErr0REQUIRES_VIOLATION, cstrcmpErr1REQUIRES_VIOLATION, cstrcmpErr2REQUIRES_VIOLATION, cstrcmpErr3REQUIRES_VIOLATION (and 15 more)] === [2021-10-28 09:03:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:54,575 INFO L85 PathProgramCache]: Analyzing trace with hash -845931790, now seen corresponding path program 21 times [2021-10-28 09:03:54,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:54,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500223596] [2021-10-28 09:03:54,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:54,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:55,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 312 proven. 241 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-10-28 09:03:55,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:55,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500223596] [2021-10-28 09:03:55,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500223596] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:55,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696400551] [2021-10-28 09:03:55,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:03:55,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:55,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:55,589 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:03:55,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-28 09:04:02,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-28 09:04:02,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:04:02,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 89 conjunts are in the unsatisfiable core [2021-10-28 09:04:02,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:02,446 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-28 09:04:02,446 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 [2021-10-28 09:04:02,966 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 23 treesize of output 19 [2021-10-28 09:04:04,157 INFO L354 Elim1Store]: treesize reduction 16, result has 66.0 percent of original size [2021-10-28 09:04:04,158 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 46 [2021-10-28 09:04:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 40 proven. 43 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2021-10-28 09:04:04,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696400551] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:04,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:04,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 42 [2021-10-28 09:04:04,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884735007] [2021-10-28 09:04:04,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-28 09:04:04,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:04,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-28 09:04:04,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1511, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 09:04:04,289 INFO L87 Difference]: Start difference. First operand 166 states and 169 transitions. Second operand has 42 states, 41 states have (on average 3.8048780487804876) internal successors, (156), 39 states have internal predecessors, (156), 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) [2021-10-28 09:04:10,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:10,502 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2021-10-28 09:04:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-10-28 09:04:10,502 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.8048780487804876) internal successors, (156), 39 states have internal predecessors, (156), 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 165 [2021-10-28 09:04:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:10,503 INFO L225 Difference]: With dead ends: 285 [2021-10-28 09:04:10,503 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 09:04:10,504 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4935 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2245, Invalid=15845, Unknown=0, NotChecked=0, Total=18090 [2021-10-28 09:04:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 09:04:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 09:04:10,504 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) [2021-10-28 09:04:10,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 09:04:10,504 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 165 [2021-10-28 09:04:10,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:10,505 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 09:04:10,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.8048780487804876) internal successors, (156), 39 states have internal predecessors, (156), 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) [2021-10-28 09:04:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 09:04:10,505 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 09:04:10,507 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr0REQUIRES_VIOLATION [2021-10-28 09:04:10,508 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr1REQUIRES_VIOLATION [2021-10-28 09:04:10,508 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr2REQUIRES_VIOLATION [2021-10-28 09:04:10,508 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr3REQUIRES_VIOLATION [2021-10-28 09:04:10,509 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr4REQUIRES_VIOLATION [2021-10-28 09:04:10,509 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr5REQUIRES_VIOLATION [2021-10-28 09:04:10,509 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr6REQUIRES_VIOLATION [2021-10-28 09:04:10,509 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr7REQUIRES_VIOLATION [2021-10-28 09:04:10,509 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr8REQUIRES_VIOLATION [2021-10-28 09:04:10,509 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrcmpErr9REQUIRES_VIOLATION [2021-10-28 09:04:10,510 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 09:04:10,510 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 09:04:10,510 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-28 09:04:10,510 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-28 09:04:10,510 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-28 09:04:10,510 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-28 09:04:10,511 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-28 09:04:10,511 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-28 09:04:10,511 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:04:10,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-28 09:04:10,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:10,717 INFO L731 BasicCegarLoop]: Path program histogram: [21, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:10,719 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:04:10,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:04:10 BoogieIcfgContainer [2021-10-28 09:04:10,721 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:04:10,722 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:04:10,722 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:04:10,722 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:04:10,723 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:59:38" (3/4) ... [2021-10-28 09:04:10,726 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 09:04:10,732 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 09:04:10,732 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrcmp [2021-10-28 09:04:10,732 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 09:04:10,732 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 09:04:10,732 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-28 09:04:10,732 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-28 09:04:10,733 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 09:04:10,733 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-28 09:04:10,738 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-28 09:04:10,738 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-28 09:04:10,739 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:04:10,739 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 09:04:10,795 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:04:10,795 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:04:10,796 INFO L168 Benchmark]: Toolchain (without parser) took 274507.29 ms. Allocated memory was 94.4 MB in the beginning and 943.7 MB in the end (delta: 849.3 MB). Free memory was 57.7 MB in the beginning and 262.7 MB in the end (delta: -205.0 MB). Peak memory consumption was 642.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:10,797 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 94.4 MB. Free memory was 67.2 MB in the beginning and 67.2 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:04:10,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1280.63 ms. Allocated memory is still 94.4 MB. Free memory was 57.7 MB in the beginning and 63.9 MB in the end (delta: -6.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:10,797 INFO L168 Benchmark]: Boogie Preprocessor took 184.45 ms. Allocated memory is still 94.4 MB. Free memory was 63.9 MB in the beginning and 61.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:10,798 INFO L168 Benchmark]: RCFGBuilder took 886.90 ms. Allocated memory is still 94.4 MB. Free memory was 61.4 MB in the beginning and 41.3 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:10,798 INFO L168 Benchmark]: TraceAbstraction took 272068.92 ms. Allocated memory was 94.4 MB in the beginning and 943.7 MB in the end (delta: 849.3 MB). Free memory was 40.8 MB in the beginning and 266.5 MB in the end (delta: -225.6 MB). Peak memory consumption was 626.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:10,798 INFO L168 Benchmark]: Witness Printer took 73.47 ms. Allocated memory is still 943.7 MB. Free memory was 265.4 MB in the beginning and 262.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:10,801 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 94.4 MB. Free memory was 67.2 MB in the beginning and 67.2 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1280.63 ms. Allocated memory is still 94.4 MB. Free memory was 57.7 MB in the beginning and 63.9 MB in the end (delta: -6.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 184.45 ms. Allocated memory is still 94.4 MB. Free memory was 63.9 MB in the beginning and 61.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 886.90 ms. Allocated memory is still 94.4 MB. Free memory was 61.4 MB in the beginning and 41.3 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 272068.92 ms. Allocated memory was 94.4 MB in the beginning and 943.7 MB in the end (delta: 849.3 MB). Free memory was 40.8 MB in the beginning and 266.5 MB in the end (delta: -225.6 MB). Peak memory consumption was 626.3 MB. Max. memory is 16.1 GB. * Witness Printer took 73.47 ms. Allocated memory is still 943.7 MB. Free memory was 265.4 MB in the beginning and 262.7 MB in the end (delta: 2.7 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: 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: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: 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: 542]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 542]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 521]: 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, 73 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 271.9s, OverallIterations: 53, TraceHistogramMax: 12, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 148.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1610 SDtfs, 6374 SDslu, 11663 SDs, 0 SdLazy, 54992 SolverSat, 1440 SolverUnsat, 17 SolverUnknown, 0 SolverNotchecked, 46.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4552 GetRequests, 2390 SyntacticMatches, 18 SemanticMatches, 2144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42651 ImplicationChecksByTransitivity, 126.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=52, InterpolantAutomatonStates: 1205, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 53 MinimizatonAttempts, 258 StatesRemovedByMinimization, 39 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 11.7s SatisfiabilityAnalysisTime, 73.2s InterpolantComputationTime, 5991 NumberOfCodeBlocks, 5891 NumberOfCodeBlocksAsserted, 174 NumberOfCheckSat, 5904 ConstructedInterpolants, 310 QuantifiedInterpolants, 64018 SizeOfPredicates, 696 NumberOfNonLiveVariables, 12594 ConjunctsInSsa, 2380 ConjunctsInUnsatCore, 87 InterpolantComputations, 21 PerfectInterpolantSequences, 6227/13969 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! [2021-10-28 09:04:10,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_26022bda-233f-4580-972f-ac7a7dd64ca2/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...