./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.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_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/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_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/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_154e862b-2a30-493a-b742-9bcc4e16f7ed/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 67e6429a6543f453ac429a23a8d2fcad0657c53add4186ba92445fb458193f20 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 09:03:51,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:03:51,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:03:51,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:03:51,782 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:03:51,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:03:51,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:03:51,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:03:51,790 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:03:51,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:03:51,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:03:51,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:03:51,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:03:51,797 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:03:51,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:03:51,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:03:51,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:03:51,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:03:51,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:03:51,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:03:51,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:03:51,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:03:51,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:03:51,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:03:51,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:03:51,820 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:03:51,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:03:51,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:03:51,822 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:03:51,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:03:51,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:03:51,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:03:51,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:03:51,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:03:51,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:03:51,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:03:51,831 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:03:51,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:03:51,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:03:51,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:03:51,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:03:51,837 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 09:03:51,880 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:03:51,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:03:51,885 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:03:51,885 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:03:51,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:03:51,894 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:03:51,894 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:03:51,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:03:51,895 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:03:51,895 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:03:51,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:03:51,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:03:51,897 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:03:51,897 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:03:51,897 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:03:51,898 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 09:03:51,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:03:51,898 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:03:51,898 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:03:51,899 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:03:51,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:03:51,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:03:51,900 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:03:51,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:03:51,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:03:51,901 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:03:51,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:03:51,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:03:51,902 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:03:51,903 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_154e862b-2a30-493a-b742-9bcc4e16f7ed/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67e6429a6543f453ac429a23a8d2fcad0657c53add4186ba92445fb458193f20 [2021-10-28 09:03:52,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:03:52,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:03:52,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:03:52,262 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:03:52,263 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:03:52,264 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-10-28 09:03:52,344 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/data/78ac3b182/93b253230a364609828dd72fabc631bd/FLAGa24de508f [2021-10-28 09:03:53,003 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:03:53,005 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-10-28 09:03:53,027 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/data/78ac3b182/93b253230a364609828dd72fabc631bd/FLAGa24de508f [2021-10-28 09:03:53,292 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/data/78ac3b182/93b253230a364609828dd72fabc631bd [2021-10-28 09:03:53,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:03:53,296 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:03:53,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:03:53,299 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:03:53,302 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:03:53,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:03:53" (1/1) ... [2021-10-28 09:03:53,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37a9097 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:53, skipping insertion in model container [2021-10-28 09:03:53,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:03:53" (1/1) ... [2021-10-28 09:03:53,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:03:53,351 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:03:53,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:03:53,697 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:03:53,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:03:53,796 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:03:53,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:53 WrapperNode [2021-10-28 09:03:53,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:03:53,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:03:53,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:03:53,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:03:53,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:53" (1/1) ... [2021-10-28 09:03:53,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:53" (1/1) ... [2021-10-28 09:03:53,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:53" (1/1) ... [2021-10-28 09:03:53,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:53" (1/1) ... [2021-10-28 09:03:53,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:53" (1/1) ... [2021-10-28 09:03:53,862 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:53" (1/1) ... [2021-10-28 09:03:53,866 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:53" (1/1) ... [2021-10-28 09:03:53,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:03:53,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:03:53,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:03:53,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:03:53,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:53" (1/1) ... [2021-10-28 09:03:53,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:03:53,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:53,924 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:03:53,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:03:54,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:03:54,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:03:54,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 09:03:54,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 09:03:54,005 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 09:03:54,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 09:03:54,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 09:03:54,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:03:54,008 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 09:03:54,008 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 09:03:54,008 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 09:03:54,009 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 09:03:54,010 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 09:03:54,010 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 09:03:54,010 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 09:03:54,010 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 09:03:54,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 09:03:54,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 09:03:54,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 09:03:54,011 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 09:03:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 09:03:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 09:03:54,012 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 09:03:54,013 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 09:03:54,013 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 09:03:54,013 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 09:03:54,013 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 09:03:54,014 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 09:03:54,014 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 09:03:54,014 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 09:03:54,014 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 09:03:54,015 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 09:03:54,015 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 09:03:54,015 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 09:03:54,015 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 09:03:54,016 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 09:03:54,016 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 09:03:54,016 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 09:03:54,016 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 09:03:54,017 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 09:03:54,017 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 09:03:54,017 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 09:03:54,018 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 09:03:54,018 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 09:03:54,019 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 09:03:54,019 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 09:03:54,020 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 09:03:54,020 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 09:03:54,020 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 09:03:54,021 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 09:03:54,021 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 09:03:54,021 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 09:03:54,021 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 09:03:54,023 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 09:03:54,023 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 09:03:54,023 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 09:03:54,023 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 09:03:54,024 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 09:03:54,024 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 09:03:54,024 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 09:03:54,024 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 09:03:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 09:03:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 09:03:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:03:54,025 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:03:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 09:03:54,026 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:03:54,027 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 09:03:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 09:03:54,028 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 09:03:54,029 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 09:03:54,030 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:03:54,030 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 09:03:54,030 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 09:03:54,030 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 09:03:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 09:03:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 09:03:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 09:03:54,031 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 09:03:54,032 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 09:03:54,032 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 09:03:54,032 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 09:03:54,032 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 09:03:54,033 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 09:03:54,033 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 09:03:54,033 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 09:03:54,033 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 09:03:54,033 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 09:03:54,034 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 09:03:54,034 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 09:03:54,034 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 09:03:54,034 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 09:03:54,035 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 09:03:54,035 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 09:03:54,035 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 09:03:54,035 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 09:03:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 09:03:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 09:03:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 09:03:54,036 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 09:03:54,037 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 09:03:54,037 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 09:03:54,037 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 09:03:54,037 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 09:03:54,038 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 09:03:54,038 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 09:03:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 09:03:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 09:03:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 09:03:54,039 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 09:03:54,040 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 09:03:54,040 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 09:03:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 09:03:54,041 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 09:03:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 09:03:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:03:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-28 09:03:54,042 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:03:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:03:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:03:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:03:54,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:03:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:03:54,044 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:03:54,638 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:03:54,638 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-28 09:03:54,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:03:54 BoogieIcfgContainer [2021-10-28 09:03:54,641 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:03:54,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:03:54,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:03:54,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:03:54,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:03:53" (1/3) ... [2021-10-28 09:03:54,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596b00f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:03:54, skipping insertion in model container [2021-10-28 09:03:54,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:03:53" (2/3) ... [2021-10-28 09:03:54,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@596b00f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:03:54, skipping insertion in model container [2021-10-28 09:03:54,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:03:54" (3/3) ... [2021-10-28 09:03:54,652 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2021-10-28 09:03:54,659 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:03:54,660 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-10-28 09:03:54,744 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:03:54,752 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 09:03:54,752 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-10-28 09:03:54,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 60 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:03:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:03:54,782 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:54,782 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:54,782 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-28 09:03:54,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:54,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1096953401, now seen corresponding path program 1 times [2021-10-28 09:03:54,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:54,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265333817] [2021-10-28 09:03:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:54,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:55,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:55,176 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 09:03:55,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:55,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265333817] [2021-10-28 09:03:55,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265333817] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:03:55,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:03:55,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:03:55,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701081605] [2021-10-28 09:03:55,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:03:55,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:55,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:03:55,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:03:55,225 INFO L87 Difference]: Start difference. First operand has 65 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 60 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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 09:03:55,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:55,729 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2021-10-28 09:03:55,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:03:55,731 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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 09:03:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:55,743 INFO L225 Difference]: With dead ends: 125 [2021-10-28 09:03:55,744 INFO L226 Difference]: Without dead ends: 121 [2021-10-28 09:03:55,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:03:55,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-28 09:03:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 65. [2021-10-28 09:03:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 61 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:03:55,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-10-28 09:03:55,809 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 11 [2021-10-28 09:03:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:55,810 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-10-28 09:03:55,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 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 09:03:55,811 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-10-28 09:03:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:03:55,813 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:55,813 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:55,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:03:55,813 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-28 09:03:55,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:55,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1096953402, now seen corresponding path program 1 times [2021-10-28 09:03:55,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:55,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663240595] [2021-10-28 09:03:55,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:55,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:55,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:55,940 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 09:03:55,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:55,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663240595] [2021-10-28 09:03:55,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663240595] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:03:55,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:03:55,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:03:55,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237505397] [2021-10-28 09:03:55,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:03:55,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:55,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:03:55,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:03:55,951 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:03:56,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:56,069 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-10-28 09:03:56,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:03:56,071 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 09:03:56,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:56,075 INFO L225 Difference]: With dead ends: 60 [2021-10-28 09:03:56,075 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 09:03:56,076 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 09:03:56,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 09:03:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-28 09:03:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:03:56,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-10-28 09:03:56,099 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 11 [2021-10-28 09:03:56,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:56,099 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-10-28 09:03:56,100 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 09:03:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-10-28 09:03:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 09:03:56,101 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:56,101 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:56,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:03:56,102 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-28 09:03:56,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1096893819, now seen corresponding path program 1 times [2021-10-28 09:03:56,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:56,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939449077] [2021-10-28 09:03:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:56,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:56,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:56,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:56,258 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 09:03:56,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:56,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939449077] [2021-10-28 09:03:56,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939449077] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:03:56,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:03:56,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:03:56,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123437115] [2021-10-28 09:03:56,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:03:56,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:56,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:03:56,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:03:56,262 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 09:03:56,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:56,422 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-10-28 09:03:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:03:56,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 09:03:56,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:56,431 INFO L225 Difference]: With dead ends: 64 [2021-10-28 09:03:56,431 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 09:03:56,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:03:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 09:03:56,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-10-28 09:03:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.631578947368421) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:03:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-10-28 09:03:56,450 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 11 [2021-10-28 09:03:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:56,451 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-10-28 09:03:56,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 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 09:03:56,452 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-10-28 09:03:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:03:56,452 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:56,452 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:56,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:03:56,453 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-28 09:03:56,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:56,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1271599478, now seen corresponding path program 1 times [2021-10-28 09:03:56,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:56,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34595628] [2021-10-28 09:03:56,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:56,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:56,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:56,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:56,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:03:56,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:56,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34595628] [2021-10-28 09:03:56,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34595628] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:03:56,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:03:56,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:03:56,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084951048] [2021-10-28 09:03:56,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:03:56,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:56,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:03:56,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:03:56,549 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 09:03:56,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:56,669 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-10-28 09:03:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:03:56,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 15 [2021-10-28 09:03:56,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:56,672 INFO L225 Difference]: With dead ends: 60 [2021-10-28 09:03:56,672 INFO L226 Difference]: Without dead ends: 60 [2021-10-28 09:03:56,672 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:03:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-28 09:03:56,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-28 09:03:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:03:56,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-10-28 09:03:56,678 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 15 [2021-10-28 09:03:56,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:56,679 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-10-28 09:03:56,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 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 09:03:56,680 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-10-28 09:03:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:03:56,680 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:56,681 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:56,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:03:56,681 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-28 09:03:56,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash -2080946104, now seen corresponding path program 1 times [2021-10-28 09:03:56,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:56,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146213715] [2021-10-28 09:03:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:56,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:56,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:56,794 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 09:03:56,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:56,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146213715] [2021-10-28 09:03:56,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146213715] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:56,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670181237] [2021-10-28 09:03:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:56,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:56,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:56,798 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:03:56,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:03:56,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:56,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:03:56,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:03:57,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670181237] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:03:57,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 09:03:57,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-10-28 09:03:57,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547999881] [2021-10-28 09:03:57,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:03:57,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:57,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:03:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:03:57,090 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:03:57,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:57,133 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-10-28 09:03:57,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:03:57,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-28 09:03:57,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:57,135 INFO L225 Difference]: With dead ends: 109 [2021-10-28 09:03:57,135 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 09:03:57,136 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:03:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 09:03:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 66. [2021-10-28 09:03:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 62 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:03:57,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2021-10-28 09:03:57,143 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 15 [2021-10-28 09:03:57,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:57,157 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2021-10-28 09:03:57,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:03:57,157 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2021-10-28 09:03:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:03:57,158 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:57,158 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:57,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:57,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:57,385 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-28 09:03:57,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:57,386 INFO L85 PathProgramCache]: Analyzing trace with hash -591541108, now seen corresponding path program 1 times [2021-10-28 09:03:57,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:57,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823282414] [2021-10-28 09:03:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:57,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:57,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:57,608 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 09:03:57,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:57,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823282414] [2021-10-28 09:03:57,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823282414] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:57,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950813703] [2021-10-28 09:03:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:57,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:57,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:57,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:03:57,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:03:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:57,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-28 09:03:57,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:57,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-10-28 09:03:58,067 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 09:03:58,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950813703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:58,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:03:58,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 9 [2021-10-28 09:03:58,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142508335] [2021-10-28 09:03:58,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:03:58,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:58,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:03:58,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:03:58,071 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 09:03:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:58,512 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2021-10-28 09:03:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:03:58,512 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 15 [2021-10-28 09:03:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:58,514 INFO L225 Difference]: With dead ends: 123 [2021-10-28 09:03:58,514 INFO L226 Difference]: Without dead ends: 123 [2021-10-28 09:03:58,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:03:58,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-28 09:03:58,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2021-10-28 09:03:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.48) internal successors, (74), 67 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:03:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-10-28 09:03:58,529 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 15 [2021-10-28 09:03:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:58,529 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-10-28 09:03:58,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 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 09:03:58,530 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-10-28 09:03:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 09:03:58,530 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:58,531 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:03:58,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:58,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 09:03:58,731 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-28 09:03:58,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:58,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1400887734, now seen corresponding path program 1 times [2021-10-28 09:03:58,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:58,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544415282] [2021-10-28 09:03:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:58,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:58,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:58,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:58,881 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 09:03:58,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:58,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544415282] [2021-10-28 09:03:58,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544415282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:58,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384711373] [2021-10-28 09:03:58,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:58,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:58,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:03:58,883 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:03:58,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:03:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:59,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:03:59,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:03:59,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-10-28 09:03:59,199 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 09:03:59,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384711373] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:03:59,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:03:59,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-10-28 09:03:59,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880642086] [2021-10-28 09:03:59,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:03:59,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:59,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:03:59,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:03:59,204 INFO L87 Difference]: Start difference. First operand 71 states and 77 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 09:03:59,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:59,463 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-10-28 09:03:59,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:03:59,463 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 15 [2021-10-28 09:03:59,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:59,464 INFO L225 Difference]: With dead ends: 74 [2021-10-28 09:03:59,465 INFO L226 Difference]: Without dead ends: 74 [2021-10-28 09:03:59,465 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:03:59,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-28 09:03:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2021-10-28 09:03:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 49 states have (on average 1.469387755102041) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:03:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-10-28 09:03:59,471 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 15 [2021-10-28 09:03:59,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:59,472 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-10-28 09:03:59,472 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 09:03:59,472 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-10-28 09:03:59,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:03:59,473 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:59,473 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 09:03:59,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:03:59,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:03:59,689 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-28 09:03:59,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:59,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1665502603, now seen corresponding path program 1 times [2021-10-28 09:03:59,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:59,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164051220] [2021-10-28 09:03:59,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:59,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:59,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:03:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:03:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:03:59,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:03:59,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164051220] [2021-10-28 09:03:59,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164051220] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:03:59,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:03:59,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:03:59,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064128814] [2021-10-28 09:03:59,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:03:59,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:03:59,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:03:59,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:03:59,790 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 09:03:59,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:03:59,912 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-10-28 09:03:59,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:03:59,912 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 17 [2021-10-28 09:03:59,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:03:59,913 INFO L225 Difference]: With dead ends: 80 [2021-10-28 09:03:59,913 INFO L226 Difference]: Without dead ends: 80 [2021-10-28 09:03:59,914 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 09:03:59,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-28 09:03:59,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2021-10-28 09:03:59,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.46) internal successors, (73), 66 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:03:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-10-28 09:03:59,929 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 17 [2021-10-28 09:03:59,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:03:59,929 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-10-28 09:03:59,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 09:03:59,930 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-10-28 09:03:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 09:03:59,930 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:03:59,930 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 09:03:59,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 09:03:59,931 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-28 09:03:59,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:03:59,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1665502644, now seen corresponding path program 1 times [2021-10-28 09:03:59,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:03:59,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049913633] [2021-10-28 09:03:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:03:59,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:03:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:00,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:04:00,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:00,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:04:00,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:04:00,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049913633] [2021-10-28 09:04:00,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049913633] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:00,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863372470] [2021-10-28 09:04:00,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:00,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:00,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:04:00,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:04:00,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:04:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:04:00,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:04:00,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:04:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:04:00,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863372470] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:04:00,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:04:00,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-10-28 09:04:00,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649298482] [2021-10-28 09:04:00,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 09:04:00,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:04:00,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:04:00,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:04:00,308 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 09:04:00,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:04:00,527 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-10-28 09:04:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:04:00,528 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 09:04:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:04:00,529 INFO L225 Difference]: With dead ends: 81 [2021-10-28 09:04:00,529 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 09:04:00,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:04:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 09:04:00,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-10-28 09:04:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 55 states have (on average 1.4363636363636363) internal successors, (79), 71 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:04:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-10-28 09:04:00,534 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 17 [2021-10-28 09:04:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:04:00,534 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-10-28 09:04:00,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 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 09:04:00,534 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-10-28 09:04:00,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:04:00,535 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:04:00,535 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 09:04:00,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:04:00,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:04:00,747 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-10-28 09:04:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:04:00,748 INFO L85 PathProgramCache]: Analyzing trace with hash 94437838, now seen corresponding path program 1 times [2021-10-28 09:04:00,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:04:00,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476917541] [2021-10-28 09:04:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:04:00,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:04:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:04:00,765 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:04:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:04:00,810 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:04:00,811 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:04:00,812 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9REQUIRES_VIOLATION [2021-10-28 09:04:00,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 09:04:00,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 09:04:00,814 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 09:04:00,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 09:04:00,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 09:04:00,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 09:04:00,815 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 09:04:00,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 09:04:00,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 09:04:00,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 09:04:00,816 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 09:04:00,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-28 09:04:00,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 09:04:00,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 09:04:00,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-28 09:04:00,817 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-28 09:04:00,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-28 09:04:00,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-28 09:04:00,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-28 09:04:00,818 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-28 09:04:00,819 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-28 09:04:00,819 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:04:00,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 09:04:00,823 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:04:00,828 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:04:00,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:04:00 BoogieIcfgContainer [2021-10-28 09:04:00,857 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:04:00,858 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:04:00,858 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:04:00,858 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:04:00,859 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:03:54" (3/4) ... [2021-10-28 09:04:00,861 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 09:04:00,903 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_154e862b-2a30-493a-b742-9bcc4e16f7ed/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:04:00,903 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:04:00,905 INFO L168 Benchmark]: Toolchain (without parser) took 7607.43 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 68.0 MB in the beginning and 101.0 MB in the end (delta: -33.0 MB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:00,905 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 100.7 MB. Free memory is still 56.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:04:00,905 INFO L168 Benchmark]: CACSL2BoogieTranslator took 500.03 ms. Allocated memory is still 100.7 MB. Free memory was 67.8 MB in the beginning and 70.0 MB in the end (delta: -2.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:00,906 INFO L168 Benchmark]: Boogie Preprocessor took 74.05 ms. Allocated memory is still 100.7 MB. Free memory was 70.0 MB in the beginning and 67.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:00,906 INFO L168 Benchmark]: RCFGBuilder took 766.09 ms. Allocated memory is still 100.7 MB. Free memory was 67.5 MB in the beginning and 46.9 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:00,907 INFO L168 Benchmark]: TraceAbstraction took 6214.36 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 46.2 MB in the beginning and 103.1 MB in the end (delta: -56.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:04:00,907 INFO L168 Benchmark]: Witness Printer took 44.77 ms. Allocated memory is still 146.8 MB. Free memory was 103.1 MB in the beginning and 101.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:04:00,910 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 100.7 MB. Free memory is still 56.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 500.03 ms. Allocated memory is still 100.7 MB. Free memory was 67.8 MB in the beginning and 70.0 MB in the end (delta: -2.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 74.05 ms. Allocated memory is still 100.7 MB. Free memory was 70.0 MB in the beginning and 67.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 766.09 ms. Allocated memory is still 100.7 MB. Free memory was 67.5 MB in the beginning and 46.9 MB in the end (delta: 20.6 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6214.36 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 46.2 MB in the beginning and 103.1 MB in the end (delta: -56.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 44.77 ms. Allocated memory is still 146.8 MB. Free memory was 103.1 MB in the beginning and 101.0 MB in the end (delta: 2.1 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 - CounterExampleResult [Line: 529]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int i, j, tmp; [L516] int length = __VERIFIER_nondet_int(); [L517] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L518] COND FALSE !(length % 2 == 0) VAL [length=1] [L519] int *arr = __builtin_alloca (length*sizeof(int)); [L521] int i = 0; VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=0, length=1] [L521] COND TRUE i < length [L523] arr[i] = __VERIFIER_nondet_int() VAL [__builtin_alloca (length*sizeof(int))={2:0}, __VERIFIER_nondet_int()=-1, arr={2:0}, i=0, length=1] [L521] i++ VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1] [L521] COND FALSE !(i < length) VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1] [L526] i=0 VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, i=0, length=1] [L526] COND TRUE i