./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/list-ext_flag.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_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/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_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/list-ext_flag.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/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_18d8740d-e371-4c2d-8893-cb785681de72/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 3747e65f01c1fbd6eb9d2ad39b0ceed8be631bde45acb074c0903963e660faab .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 09:22:16,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:22:16,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:22:16,822 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:22:16,823 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:22:16,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:22:16,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:22:16,832 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:22:16,835 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:22:16,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:22:16,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:22:16,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:22:16,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:22:16,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:22:16,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:22:16,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:22:16,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:22:16,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:22:16,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:22:16,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:22:16,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:22:16,868 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:22:16,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:22:16,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:22:16,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:22:16,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:22:16,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:22:16,883 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:22:16,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:22:16,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:22:16,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:22:16,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:22:16,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:22:16,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:22:16,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:22:16,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:22:16,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:22:16,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:22:16,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:22:16,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:22:16,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:22:16,895 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 09:22:16,936 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:22:16,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:22:16,936 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:22:16,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:22:16,939 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:22:16,939 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:22:16,939 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:22:16,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:22:16,940 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:22:16,940 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:22:16,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:22:16,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:22:16,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:22:16,941 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 09:22:16,942 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 09:22:16,942 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 09:22:16,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:22:16,942 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 09:22:16,943 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:22:16,943 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:22:16,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:22:16,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:22:16,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:22:16,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:22:16,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:22:16,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:22:16,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:22:16,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:22:16,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:22:16,946 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_18d8740d-e371-4c2d-8893-cb785681de72/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3747e65f01c1fbd6eb9d2ad39b0ceed8be631bde45acb074c0903963e660faab [2021-10-28 09:22:17,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:22:17,226 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:22:17,228 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:22:17,230 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:22:17,232 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:22:17,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-ext-properties/list-ext_flag.i [2021-10-28 09:22:17,314 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/data/f8c9bec31/bb850e2d31d34bc9af646cb4e9f3bd8d/FLAG470123679 [2021-10-28 09:22:17,901 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:22:17,902 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/sv-benchmarks/c/list-ext-properties/list-ext_flag.i [2021-10-28 09:22:17,920 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/data/f8c9bec31/bb850e2d31d34bc9af646cb4e9f3bd8d/FLAG470123679 [2021-10-28 09:22:18,210 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/data/f8c9bec31/bb850e2d31d34bc9af646cb4e9f3bd8d [2021-10-28 09:22:18,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:22:18,216 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 09:22:18,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:22:18,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:22:18,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:22:18,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:22:18" (1/1) ... [2021-10-28 09:22:18,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16597441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:18, skipping insertion in model container [2021-10-28 09:22:18,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:22:18" (1/1) ... [2021-10-28 09:22:18,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:22:18,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:22:18,626 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/sv-benchmarks/c/list-ext-properties/list-ext_flag.i[23527,23540] [2021-10-28 09:22:18,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:22:18,647 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:22:18,717 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/sv-benchmarks/c/list-ext-properties/list-ext_flag.i[23527,23540] [2021-10-28 09:22:18,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:22:18,756 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:22:18,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:18 WrapperNode [2021-10-28 09:22:18,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:22:18,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:22:18,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:22:18,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:22:18,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:18" (1/1) ... [2021-10-28 09:22:18,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:18" (1/1) ... [2021-10-28 09:22:18,783 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:18" (1/1) ... [2021-10-28 09:22:18,783 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:18" (1/1) ... [2021-10-28 09:22:18,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:18" (1/1) ... [2021-10-28 09:22:18,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:18" (1/1) ... [2021-10-28 09:22:18,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:18" (1/1) ... [2021-10-28 09:22:18,816 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:22:18,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:22:18,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:22:18,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:22:18,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:18" (1/1) ... [2021-10-28 09:22:18,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:22:18,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:18,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:22:18,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:22:18,910 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 09:22:18,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:22:18,911 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 09:22:18,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 09:22:18,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 09:22:18,913 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 09:22:18,913 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 09:22:18,914 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 09:22:18,914 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 09:22:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 09:22:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 09:22:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 09:22:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:22:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 09:22:18,915 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 09:22:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 09:22:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 09:22:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 09:22:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 09:22:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 09:22:18,916 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 09:22:18,917 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 09:22:18,917 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 09:22:18,917 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 09:22:18,917 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 09:22:18,917 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 09:22:18,917 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 09:22:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 09:22:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 09:22:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 09:22:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 09:22:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 09:22:18,918 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 09:22:18,919 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 09:22:18,919 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 09:22:18,919 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 09:22:18,919 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 09:22:18,919 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 09:22:18,919 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 09:22:18,920 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 09:22:18,920 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 09:22:18,920 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 09:22:18,920 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 09:22:18,920 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 09:22:18,920 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 09:22:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 09:22:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 09:22:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 09:22:18,921 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 09:22:18,922 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 09:22:18,923 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 09:22:18,923 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 09:22:18,923 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 09:22:18,923 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 09:22:18,924 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 09:22:18,924 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 09:22:18,924 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 09:22:18,924 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 09:22:18,924 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 09:22:18,924 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 09:22:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 09:22:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 09:22:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 09:22:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 09:22:18,925 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 09:22:18,926 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 09:22:18,927 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 09:22:18,927 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 09:22:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 09:22:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 09:22:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 09:22:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 09:22:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 09:22:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 09:22:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 09:22:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 09:22:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 09:22:18,930 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 09:22:18,930 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 09:22:18,931 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 09:22:18,931 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 09:22:18,931 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 09:22:18,931 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 09:22:18,931 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 09:22:18,931 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 09:22:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 09:22:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 09:22:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 09:22:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 09:22:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 09:22:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 09:22:18,933 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 09:22:18,933 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 09:22:18,933 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 09:22:18,933 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 09:22:18,933 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 09:22:18,933 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 09:22:18,934 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 09:22:18,934 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 09:22:18,934 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 09:22:18,934 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 09:22:18,934 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 09:22:18,934 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 09:22:18,934 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 09:22:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 09:22:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 09:22:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 09:22:18,935 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 09:22:18,936 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 09:22:18,936 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 09:22:18,937 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 09:22:18,937 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 09:22:18,937 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 09:22:18,937 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 09:22:18,937 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 09:22:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 09:22:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 09:22:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 09:22:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 09:22:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:22:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:22:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 09:22:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:22:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 09:22:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:22:18,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:22:19,261 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 09:22:19,573 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:22:19,573 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-28 09:22:19,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:22:19 BoogieIcfgContainer [2021-10-28 09:22:19,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:22:19,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:22:19,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:22:19,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:22:19,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:22:18" (1/3) ... [2021-10-28 09:22:19,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792ea5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:22:19, skipping insertion in model container [2021-10-28 09:22:19,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:22:18" (2/3) ... [2021-10-28 09:22:19,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@792ea5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:22:19, skipping insertion in model container [2021-10-28 09:22:19,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:22:19" (3/3) ... [2021-10-28 09:22:19,584 INFO L111 eAbstractionObserver]: Analyzing ICFG list-ext_flag.i [2021-10-28 09:22:19,589 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:22:19,589 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 45 error locations. [2021-10-28 09:22:19,631 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:22:19,637 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 09:22:19,638 INFO L340 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2021-10-28 09:22:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand has 109 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 103 states have internal predecessors, (117), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 09:22:19,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 09:22:19,661 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:19,661 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:19,661 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:19,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash -847606299, now seen corresponding path program 1 times [2021-10-28 09:22:19,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:19,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744955463] [2021-10-28 09:22:19,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:19,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:19,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:19,875 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 09:22:19,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:19,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744955463] [2021-10-28 09:22:19,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744955463] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:22:19,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:22:19,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:22:19,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5505056] [2021-10-28 09:22:19,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:22:19,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:19,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:22:19,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:22:19,898 INFO L87 Difference]: Start difference. First operand has 109 states, 56 states have (on average 2.0892857142857144) internal successors, (117), 103 states have internal predecessors, (117), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (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 09:22:20,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:20,157 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2021-10-28 09:22:20,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:22:20,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (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 8 [2021-10-28 09:22:20,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:20,166 INFO L225 Difference]: With dead ends: 128 [2021-10-28 09:22:20,167 INFO L226 Difference]: Without dead ends: 120 [2021-10-28 09:22:20,168 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 09:22:20,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-28 09:22:20,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2021-10-28 09:22:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 53 states have (on average 1.9811320754716981) internal successors, (105), 96 states have internal predecessors, (105), 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 09:22:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2021-10-28 09:22:20,242 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 8 [2021-10-28 09:22:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:20,243 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2021-10-28 09:22:20,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (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 09:22:20,243 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2021-10-28 09:22:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-28 09:22:20,244 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:20,244 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:20,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:22:20,245 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:20,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:20,247 INFO L85 PathProgramCache]: Analyzing trace with hash -847606298, now seen corresponding path program 1 times [2021-10-28 09:22:20,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:20,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752960647] [2021-10-28 09:22:20,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:20,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:20,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:20,387 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 09:22:20,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:20,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752960647] [2021-10-28 09:22:20,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752960647] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:22:20,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:22:20,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:22:20,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517941628] [2021-10-28 09:22:20,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:22:20,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:20,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:22:20,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:22:20,396 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (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 09:22:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:20,599 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2021-10-28 09:22:20,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:22:20,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (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 8 [2021-10-28 09:22:20,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:20,603 INFO L225 Difference]: With dead ends: 99 [2021-10-28 09:22:20,604 INFO L226 Difference]: Without dead ends: 99 [2021-10-28 09:22:20,604 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 09:22:20,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-28 09:22:20,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-10-28 09:22:20,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 95 states have internal predecessors, (104), 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 09:22:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2021-10-28 09:22:20,622 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 8 [2021-10-28 09:22:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:20,622 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2021-10-28 09:22:20,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (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 09:22:20,623 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2021-10-28 09:22:20,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 09:22:20,624 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:20,624 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:20,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:22:20,624 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:20,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:20,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1330507837, now seen corresponding path program 1 times [2021-10-28 09:22:20,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:20,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345717839] [2021-10-28 09:22:20,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:20,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:20,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:20,760 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 09:22:20,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:20,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345717839] [2021-10-28 09:22:20,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345717839] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:22:20,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:22:20,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:22:20,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715555639] [2021-10-28 09:22:20,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:22:20,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:20,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:22:20,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:22:20,768 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:22:20,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:20,991 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2021-10-28 09:22:20,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:22:20,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 09:22:20,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:20,997 INFO L225 Difference]: With dead ends: 109 [2021-10-28 09:22:20,997 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 09:22:20,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:22:21,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 09:22:21,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2021-10-28 09:22:21,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.7) internal successors, (102), 87 states have internal predecessors, (102), 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 09:22:21,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 105 transitions. [2021-10-28 09:22:21,019 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 105 transitions. Word has length 13 [2021-10-28 09:22:21,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:21,020 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 105 transitions. [2021-10-28 09:22:21,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:22:21,020 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 105 transitions. [2021-10-28 09:22:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-28 09:22:21,021 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:21,021 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:21,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:22:21,022 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:21,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:21,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1330507836, now seen corresponding path program 1 times [2021-10-28 09:22:21,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:21,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097985600] [2021-10-28 09:22:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:21,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:21,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:21,154 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 09:22:21,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:21,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097985600] [2021-10-28 09:22:21,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097985600] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:22:21,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:22:21,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:22:21,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16574822] [2021-10-28 09:22:21,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:22:21,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:21,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:22:21,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:22:21,162 INFO L87 Difference]: Start difference. First operand 91 states and 105 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:22:21,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:21,401 INFO L93 Difference]: Finished difference Result 127 states and 142 transitions. [2021-10-28 09:22:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:22:21,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-28 09:22:21,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:21,404 INFO L225 Difference]: With dead ends: 127 [2021-10-28 09:22:21,404 INFO L226 Difference]: Without dead ends: 127 [2021-10-28 09:22:21,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:22:21,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-28 09:22:21,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 112. [2021-10-28 09:22:21,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 83 states have (on average 1.5060240963855422) internal successors, (125), 108 states have internal predecessors, (125), 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 09:22:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2021-10-28 09:22:21,428 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 13 [2021-10-28 09:22:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:21,429 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2021-10-28 09:22:21,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:22:21,429 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2021-10-28 09:22:21,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:22:21,430 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:21,430 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:21,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:22:21,431 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:21,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:21,432 INFO L85 PathProgramCache]: Analyzing trace with hash 193832546, now seen corresponding path program 1 times [2021-10-28 09:22:21,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:21,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652791344] [2021-10-28 09:22:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:21,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:21,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:21,554 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 09:22:21,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:21,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652791344] [2021-10-28 09:22:21,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652791344] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:22:21,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:22:21,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:22:21,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943180082] [2021-10-28 09:22:21,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:22:21,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:21,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:22:21,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:22:21,557 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 09:22:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:21,725 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2021-10-28 09:22:21,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:22:21,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 19 [2021-10-28 09:22:21,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:21,729 INFO L225 Difference]: With dead ends: 160 [2021-10-28 09:22:21,729 INFO L226 Difference]: Without dead ends: 160 [2021-10-28 09:22:21,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 09:22:21,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-28 09:22:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 117. [2021-10-28 09:22:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 88 states have (on average 1.4886363636363635) internal successors, (131), 113 states have internal predecessors, (131), 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 09:22:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2021-10-28 09:22:21,744 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 19 [2021-10-28 09:22:21,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:21,744 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2021-10-28 09:22:21,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 09:22:21,745 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2021-10-28 09:22:21,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 09:22:21,746 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:21,746 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 09:22:21,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 09:22:21,747 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:21,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:21,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1616463057, now seen corresponding path program 1 times [2021-10-28 09:22:21,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:21,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380246332] [2021-10-28 09:22:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:21,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:21,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:21,866 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 09:22:21,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:21,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380246332] [2021-10-28 09:22:21,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380246332] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:22:21,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:22:21,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:22:21,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549022231] [2021-10-28 09:22:21,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:22:21,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:21,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:22:21,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:22:21,875 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 09:22:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:22,170 INFO L93 Difference]: Finished difference Result 173 states and 189 transitions. [2021-10-28 09:22:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:22:22,170 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 21 [2021-10-28 09:22:22,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:22,172 INFO L225 Difference]: With dead ends: 173 [2021-10-28 09:22:22,173 INFO L226 Difference]: Without dead ends: 173 [2021-10-28 09:22:22,173 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:22:22,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-28 09:22:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 117. [2021-10-28 09:22:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 88 states have (on average 1.4772727272727273) internal successors, (130), 113 states have internal predecessors, (130), 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 09:22:22,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2021-10-28 09:22:22,181 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 21 [2021-10-28 09:22:22,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:22,182 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2021-10-28 09:22:22,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 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 09:22:22,183 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2021-10-28 09:22:22,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-28 09:22:22,184 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:22,184 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:22,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 09:22:22,184 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr31ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:22,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:22,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1497879082, now seen corresponding path program 1 times [2021-10-28 09:22:22,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:22,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753358352] [2021-10-28 09:22:22,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:22,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:22,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:22,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:22,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753358352] [2021-10-28 09:22:22,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753358352] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:22:22,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:22:22,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:22:22,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448819994] [2021-10-28 09:22:22,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:22:22,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:22,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:22:22,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:22:22,284 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 09:22:22,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:22,455 INFO L93 Difference]: Finished difference Result 126 states and 141 transitions. [2021-10-28 09:22:22,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:22:22,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 23 [2021-10-28 09:22:22,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:22,457 INFO L225 Difference]: With dead ends: 126 [2021-10-28 09:22:22,458 INFO L226 Difference]: Without dead ends: 126 [2021-10-28 09:22:22,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:22:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-28 09:22:22,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2021-10-28 09:22:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 90 states have (on average 1.4555555555555555) internal successors, (131), 114 states have internal predecessors, (131), 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 09:22:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2021-10-28 09:22:22,463 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 23 [2021-10-28 09:22:22,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:22,463 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2021-10-28 09:22:22,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 09:22:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2021-10-28 09:22:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:22:22,465 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:22,465 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:22,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 09:22:22,465 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:22,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:22,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1394657415, now seen corresponding path program 1 times [2021-10-28 09:22:22,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:22,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350281844] [2021-10-28 09:22:22,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:22,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:22,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:22,551 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 09:22:22,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:22,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350281844] [2021-10-28 09:22:22,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350281844] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:22:22,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:22:22,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 09:22:22,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595487552] [2021-10-28 09:22:22,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:22:22,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:22,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:22:22,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:22:22,553 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 09:22:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:22,722 INFO L93 Difference]: Finished difference Result 155 states and 172 transitions. [2021-10-28 09:22:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:22:22,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 26 [2021-10-28 09:22:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:22,724 INFO L225 Difference]: With dead ends: 155 [2021-10-28 09:22:22,724 INFO L226 Difference]: Without dead ends: 145 [2021-10-28 09:22:22,724 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:22:22,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-28 09:22:22,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 123. [2021-10-28 09:22:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 95 states have (on average 1.431578947368421) internal successors, (136), 119 states have internal predecessors, (136), 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 09:22:22,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2021-10-28 09:22:22,728 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 26 [2021-10-28 09:22:22,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:22,728 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2021-10-28 09:22:22,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 09:22:22,728 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2021-10-28 09:22:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:22:22,729 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:22,730 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:22,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 09:22:22,730 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:22,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:22,730 INFO L85 PathProgramCache]: Analyzing trace with hash -113018189, now seen corresponding path program 1 times [2021-10-28 09:22:22,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:22,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073415918] [2021-10-28 09:22:22,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:22,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:22,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:22,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:22,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073415918] [2021-10-28 09:22:22,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073415918] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:22:22,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:22:22,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:22:22,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912952287] [2021-10-28 09:22:22,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:22:22,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:22,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:22:22,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:22:22,819 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 09:22:23,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:23,088 INFO L93 Difference]: Finished difference Result 124 states and 140 transitions. [2021-10-28 09:22:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:22:23,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 26 [2021-10-28 09:22:23,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:23,090 INFO L225 Difference]: With dead ends: 124 [2021-10-28 09:22:23,090 INFO L226 Difference]: Without dead ends: 124 [2021-10-28 09:22:23,091 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:22:23,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-28 09:22:23,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 121. [2021-10-28 09:22:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 95 states have (on average 1.4105263157894736) internal successors, (134), 117 states have internal predecessors, (134), 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 09:22:23,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2021-10-28 09:22:23,094 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 26 [2021-10-28 09:22:23,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:23,094 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2021-10-28 09:22:23,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 09:22:23,095 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2021-10-28 09:22:23,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:22:23,096 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:23,096 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:23,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 09:22:23,096 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:23,096 INFO L85 PathProgramCache]: Analyzing trace with hash -113018188, now seen corresponding path program 1 times [2021-10-28 09:22:23,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:23,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608856090] [2021-10-28 09:22:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:23,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:23,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:23,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:23,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:23,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608856090] [2021-10-28 09:22:23,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608856090] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:22:23,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:22:23,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:22:23,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097844056] [2021-10-28 09:22:23,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:22:23,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:23,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:22:23,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:22:23,239 INFO L87 Difference]: Start difference. First operand 121 states and 137 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 09:22:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:23,574 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2021-10-28 09:22:23,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 09:22:23,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 26 [2021-10-28 09:22:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:23,580 INFO L225 Difference]: With dead ends: 121 [2021-10-28 09:22:23,580 INFO L226 Difference]: Without dead ends: 121 [2021-10-28 09:22:23,580 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-10-28 09:22:23,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-28 09:22:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2021-10-28 09:22:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 85 states have (on average 1.3647058823529412) internal successors, (116), 100 states have internal predecessors, (116), 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 09:22:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 119 transitions. [2021-10-28 09:22:23,583 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 119 transitions. Word has length 26 [2021-10-28 09:22:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:23,584 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 119 transitions. [2021-10-28 09:22:23,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 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 09:22:23,584 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 119 transitions. [2021-10-28 09:22:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 09:22:23,585 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:23,585 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:23,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 09:22:23,585 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:23,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:23,586 INFO L85 PathProgramCache]: Analyzing trace with hash 870242649, now seen corresponding path program 1 times [2021-10-28 09:22:23,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:23,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362821799] [2021-10-28 09:22:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:23,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:23,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:23,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:23,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362821799] [2021-10-28 09:22:23,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362821799] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:22:23,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:22:23,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:22:23,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958078544] [2021-10-28 09:22:23,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:22:23,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:23,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:22:23,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:22:23,789 INFO L87 Difference]: Start difference. First operand 104 states and 119 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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 09:22:24,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:24,004 INFO L93 Difference]: Finished difference Result 113 states and 128 transitions. [2021-10-28 09:22:24,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:22:24,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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 29 [2021-10-28 09:22:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:24,006 INFO L225 Difference]: With dead ends: 113 [2021-10-28 09:22:24,007 INFO L226 Difference]: Without dead ends: 102 [2021-10-28 09:22:24,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:22:24,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-28 09:22:24,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 93. [2021-10-28 09:22:24,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.4054054054054055) internal successors, (104), 89 states have internal predecessors, (104), 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 09:22:24,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2021-10-28 09:22:24,010 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 29 [2021-10-28 09:22:24,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:24,010 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2021-10-28 09:22:24,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 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 09:22:24,010 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2021-10-28 09:22:24,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 09:22:24,011 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:24,011 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:24,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-28 09:22:24,012 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:24,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:24,012 INFO L85 PathProgramCache]: Analyzing trace with hash -809558702, now seen corresponding path program 1 times [2021-10-28 09:22:24,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:24,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394256374] [2021-10-28 09:22:24,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:24,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:24,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:22:24,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:24,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394256374] [2021-10-28 09:22:24,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394256374] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:22:24,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:22:24,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-28 09:22:24,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201423526] [2021-10-28 09:22:24,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 09:22:24,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:24,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:22:24,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:22:24,097 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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 09:22:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:24,268 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2021-10-28 09:22:24,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:22:24,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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 32 [2021-10-28 09:22:24,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:24,272 INFO L225 Difference]: With dead ends: 144 [2021-10-28 09:22:24,272 INFO L226 Difference]: Without dead ends: 144 [2021-10-28 09:22:24,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:22:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-28 09:22:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 100. [2021-10-28 09:22:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.3950617283950617) internal successors, (113), 96 states have internal predecessors, (113), 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 09:22:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2021-10-28 09:22:24,280 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 32 [2021-10-28 09:22:24,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:24,280 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2021-10-28 09:22:24,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 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 09:22:24,281 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2021-10-28 09:22:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 09:22:24,287 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:24,287 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:24,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 09:22:24,288 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:24,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash -129500332, now seen corresponding path program 1 times [2021-10-28 09:22:24,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:24,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596183991] [2021-10-28 09:22:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:24,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:24,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:24,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:24,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596183991] [2021-10-28 09:22:24,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596183991] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:24,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116827951] [2021-10-28 09:22:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:24,362 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:24,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:24,367 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:24,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:22:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:24,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:22:24,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:24,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116827951] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:24,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:22:24,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-28 09:22:24,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213245158] [2021-10-28 09:22:24,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:22:24,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:24,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:22:24,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:22:24,695 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 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 09:22:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:24,839 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2021-10-28 09:22:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:22:24,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 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 32 [2021-10-28 09:22:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:24,841 INFO L225 Difference]: With dead ends: 164 [2021-10-28 09:22:24,841 INFO L226 Difference]: Without dead ends: 164 [2021-10-28 09:22:24,841 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-10-28 09:22:24,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-28 09:22:24,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 113. [2021-10-28 09:22:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 94 states have (on average 1.3404255319148937) internal successors, (126), 109 states have internal predecessors, (126), 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 09:22:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2021-10-28 09:22:24,845 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 32 [2021-10-28 09:22:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:24,845 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2021-10-28 09:22:24,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 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 09:22:24,846 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2021-10-28 09:22:24,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:22:24,846 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:24,847 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:24,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:25,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-28 09:22:25,075 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:25,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:25,076 INFO L85 PathProgramCache]: Analyzing trace with hash -569851967, now seen corresponding path program 1 times [2021-10-28 09:22:25,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:25,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865919244] [2021-10-28 09:22:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:25,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:25,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:25,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:25,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865919244] [2021-10-28 09:22:25,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865919244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:25,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016208984] [2021-10-28 09:22:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:25,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:25,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:25,382 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:25,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:22:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:25,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 09:22:25,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:25,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:22:25,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:25,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-10-28 09:22:25,850 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:22:25,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:22:25,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:25,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:25,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:25,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-10-28 09:22:25,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 09:22:26,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-10-28 09:22:26,293 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-10-28 09:22:26,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2021-10-28 09:22:26,575 INFO L354 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2021-10-28 09:22:26,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 30 [2021-10-28 09:22:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:26,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016208984] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:26,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:22:26,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-10-28 09:22:26,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320201474] [2021-10-28 09:22:26,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 09:22:26,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:26,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 09:22:26,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-10-28 09:22:26,616 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 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 09:22:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:27,872 INFO L93 Difference]: Finished difference Result 306 states and 340 transitions. [2021-10-28 09:22:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 09:22:27,873 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 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 34 [2021-10-28 09:22:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:27,875 INFO L225 Difference]: With dead ends: 306 [2021-10-28 09:22:27,875 INFO L226 Difference]: Without dead ends: 306 [2021-10-28 09:22:27,876 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=1028, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 09:22:27,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-10-28 09:22:27,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 146. [2021-10-28 09:22:27,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 127 states have (on average 1.3070866141732282) internal successors, (166), 142 states have internal predecessors, (166), 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 09:22:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 169 transitions. [2021-10-28 09:22:27,882 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 169 transitions. Word has length 34 [2021-10-28 09:22:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:27,882 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 169 transitions. [2021-10-28 09:22:27,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 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 09:22:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 169 transitions. [2021-10-28 09:22:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:22:27,884 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:27,884 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:27,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:28,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:28,097 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:28,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:28,098 INFO L85 PathProgramCache]: Analyzing trace with hash -570159797, now seen corresponding path program 1 times [2021-10-28 09:22:28,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:28,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548690486] [2021-10-28 09:22:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:28,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:28,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:28,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:28,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:28,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548690486] [2021-10-28 09:22:28,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548690486] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:28,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6877710] [2021-10-28 09:22:28,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:28,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:28,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:28,322 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:28,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:22:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:28,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 09:22:28,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:28,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:22:28,767 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:22:28,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:22:28,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 09:22:28,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:28,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-28 09:22:28,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-10-28 09:22:29,012 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 09:22:29,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-28 09:22:29,266 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:22:29,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-28 09:22:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:29,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6877710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:29,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:22:29,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-28 09:22:29,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764014425] [2021-10-28 09:22:29,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 09:22:29,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:29,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 09:22:29,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:22:29,277 INFO L87 Difference]: Start difference. First operand 146 states and 169 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 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 09:22:30,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:30,013 INFO L93 Difference]: Finished difference Result 242 states and 270 transitions. [2021-10-28 09:22:30,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 09:22:30,014 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 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 34 [2021-10-28 09:22:30,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:30,015 INFO L225 Difference]: With dead ends: 242 [2021-10-28 09:22:30,015 INFO L226 Difference]: Without dead ends: 242 [2021-10-28 09:22:30,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 09:22:30,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-28 09:22:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 154. [2021-10-28 09:22:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 135 states have (on average 1.2962962962962963) internal successors, (175), 150 states have internal predecessors, (175), 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 09:22:30,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 178 transitions. [2021-10-28 09:22:30,020 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 178 transitions. Word has length 34 [2021-10-28 09:22:30,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:30,020 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 178 transitions. [2021-10-28 09:22:30,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 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 09:22:30,021 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 178 transitions. [2021-10-28 09:22:30,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:22:30,021 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:30,021 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:30,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:30,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 09:22:30,222 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:30,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:30,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1187638495, now seen corresponding path program 1 times [2021-10-28 09:22:30,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:30,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782531234] [2021-10-28 09:22:30,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:30,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:30,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:30,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:30,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782531234] [2021-10-28 09:22:30,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782531234] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:30,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349103633] [2021-10-28 09:22:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:30,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:30,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:30,407 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:30,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:22:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:30,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-28 09:22:30,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:30,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:22:30,831 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:22:30,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:22:30,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:30,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-28 09:22:30,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 09:22:30,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-10-28 09:22:31,058 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-28 09:22:31,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-10-28 09:22:31,291 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:22:31,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-28 09:22:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:31,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349103633] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:31,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:22:31,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-10-28 09:22:31,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652850944] [2021-10-28 09:22:31,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 09:22:31,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:31,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 09:22:31,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-10-28 09:22:31,299 INFO L87 Difference]: Start difference. First operand 154 states and 178 transitions. Second operand has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 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 09:22:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:32,240 INFO L93 Difference]: Finished difference Result 277 states and 312 transitions. [2021-10-28 09:22:32,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 09:22:32,241 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 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 34 [2021-10-28 09:22:32,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:32,243 INFO L225 Difference]: With dead ends: 277 [2021-10-28 09:22:32,243 INFO L226 Difference]: Without dead ends: 277 [2021-10-28 09:22:32,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 09:22:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-10-28 09:22:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 163. [2021-10-28 09:22:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 144 states have (on average 1.2986111111111112) internal successors, (187), 159 states have internal predecessors, (187), 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 09:22:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 190 transitions. [2021-10-28 09:22:32,249 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 190 transitions. Word has length 34 [2021-10-28 09:22:32,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:32,250 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 190 transitions. [2021-10-28 09:22:32,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 22 states have internal predecessors, (59), 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 09:22:32,250 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 190 transitions. [2021-10-28 09:22:32,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 09:22:32,251 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:32,251 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:32,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:32,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:32,469 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:32,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:32,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1187946325, now seen corresponding path program 1 times [2021-10-28 09:22:32,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:32,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500116596] [2021-10-28 09:22:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:32,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:32,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:32,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:32,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500116596] [2021-10-28 09:22:32,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500116596] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:32,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10099268] [2021-10-28 09:22:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:32,731 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:32,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:32,747 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:32,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:22:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:33,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-28 09:22:33,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:33,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:22:33,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:33,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 09:22:33,348 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:22:33,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:22:33,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:33,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:33,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:33,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-28 09:22:33,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 09:22:33,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-10-28 09:22:33,730 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-10-28 09:22:33,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-10-28 09:22:33,935 INFO L354 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2021-10-28 09:22:33,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 29 [2021-10-28 09:22:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:33,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10099268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:33,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:22:33,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-10-28 09:22:33,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93664078] [2021-10-28 09:22:33,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 09:22:33,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:33,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 09:22:33,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=554, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:22:33,948 INFO L87 Difference]: Start difference. First operand 163 states and 190 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 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 09:22:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:35,212 INFO L93 Difference]: Finished difference Result 258 states and 292 transitions. [2021-10-28 09:22:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-28 09:22:35,223 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 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 34 [2021-10-28 09:22:35,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:35,225 INFO L225 Difference]: With dead ends: 258 [2021-10-28 09:22:35,225 INFO L226 Difference]: Without dead ends: 258 [2021-10-28 09:22:35,226 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=919, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:22:35,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-10-28 09:22:35,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 163. [2021-10-28 09:22:35,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 144 states have (on average 1.2916666666666667) internal successors, (186), 159 states have internal predecessors, (186), 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 09:22:35,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 189 transitions. [2021-10-28 09:22:35,231 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 189 transitions. Word has length 34 [2021-10-28 09:22:35,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:35,231 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 189 transitions. [2021-10-28 09:22:35,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 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 09:22:35,232 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 189 transitions. [2021-10-28 09:22:35,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 09:22:35,233 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:35,233 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:35,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:35,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 09:22:35,447 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:35,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:35,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1832247170, now seen corresponding path program 1 times [2021-10-28 09:22:35,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:35,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781539006] [2021-10-28 09:22:35,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:35,447 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:35,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:35,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:35,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781539006] [2021-10-28 09:22:35,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781539006] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:35,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631089275] [2021-10-28 09:22:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:35,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:35,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:35,703 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:35,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 09:22:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:36,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-28 09:22:36,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:36,249 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 09:22:36,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 09:22:36,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 09:22:36,503 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 09:22:36,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 31 [2021-10-28 09:22:36,716 INFO L354 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2021-10-28 09:22:36,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 27 [2021-10-28 09:22:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:36,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631089275] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:36,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:22:36,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-10-28 09:22:36,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70638910] [2021-10-28 09:22:36,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-28 09:22:36,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:36,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-28 09:22:36,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-10-28 09:22:36,781 INFO L87 Difference]: Start difference. First operand 163 states and 189 transitions. Second operand has 26 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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 09:22:37,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:37,508 INFO L93 Difference]: Finished difference Result 266 states and 301 transitions. [2021-10-28 09:22:37,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 09:22:37,509 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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 36 [2021-10-28 09:22:37,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:37,510 INFO L225 Difference]: With dead ends: 266 [2021-10-28 09:22:37,510 INFO L226 Difference]: Without dead ends: 266 [2021-10-28 09:22:37,511 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=249, Invalid=873, Unknown=0, NotChecked=0, Total=1122 [2021-10-28 09:22:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-10-28 09:22:37,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 166. [2021-10-28 09:22:37,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 147 states have (on average 1.2925170068027212) internal successors, (190), 162 states have internal predecessors, (190), 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 09:22:37,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 193 transitions. [2021-10-28 09:22:37,517 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 193 transitions. Word has length 36 [2021-10-28 09:22:37,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:37,517 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 193 transitions. [2021-10-28 09:22:37,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 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 09:22:37,518 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 193 transitions. [2021-10-28 09:22:37,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 09:22:37,518 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:37,519 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:37,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:37,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 09:22:37,734 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:37,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:37,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1832247171, now seen corresponding path program 1 times [2021-10-28 09:22:37,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:37,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717642931] [2021-10-28 09:22:37,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:37,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:37,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:38,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:38,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:38,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:38,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717642931] [2021-10-28 09:22:38,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717642931] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:38,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593047296] [2021-10-28 09:22:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:38,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:38,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:38,071 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:38,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 09:22:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:38,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-28 09:22:38,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:38,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:22:38,549 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:22:38,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:22:38,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 09:22:38,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:22:38,770 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 09:22:38,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 53 [2021-10-28 09:22:38,782 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-10-28 09:22:38,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 28 [2021-10-28 09:22:38,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-10-28 09:22:38,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-10-28 09:22:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:38,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593047296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:38,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:22:38,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-10-28 09:22:38,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050870135] [2021-10-28 09:22:38,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 09:22:38,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:38,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 09:22:38,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-10-28 09:22:38,970 INFO L87 Difference]: Start difference. First operand 166 states and 193 transitions. Second operand has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 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 09:22:39,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:39,503 INFO L93 Difference]: Finished difference Result 272 states and 310 transitions. [2021-10-28 09:22:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-28 09:22:39,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 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 36 [2021-10-28 09:22:39,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:39,506 INFO L225 Difference]: With dead ends: 272 [2021-10-28 09:22:39,506 INFO L226 Difference]: Without dead ends: 272 [2021-10-28 09:22:39,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:22:39,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-28 09:22:39,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 165. [2021-10-28 09:22:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 146 states have (on average 1.2876712328767124) internal successors, (188), 161 states have internal predecessors, (188), 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 09:22:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2021-10-28 09:22:39,513 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 36 [2021-10-28 09:22:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:39,513 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2021-10-28 09:22:39,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 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 09:22:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2021-10-28 09:22:39,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 09:22:39,516 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:39,516 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:39,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-28 09:22:39,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:39,717 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:39,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:39,717 INFO L85 PathProgramCache]: Analyzing trace with hash -744971369, now seen corresponding path program 1 times [2021-10-28 09:22:39,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:39,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258002206] [2021-10-28 09:22:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:39,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:39,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:39,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:39,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:39,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258002206] [2021-10-28 09:22:39,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258002206] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:39,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621559731] [2021-10-28 09:22:39,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:39,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:39,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:39,885 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:39,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 09:22:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:40,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 09:22:40,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:40,401 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:22:40,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:22:40,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-28 09:22:40,674 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:22:40,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 38 [2021-10-28 09:22:40,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:22:40,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 30 [2021-10-28 09:22:40,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:40,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621559731] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:40,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:22:40,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-10-28 09:22:40,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032192357] [2021-10-28 09:22:40,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 09:22:40,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:40,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 09:22:40,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-10-28 09:22:40,933 INFO L87 Difference]: Start difference. First operand 165 states and 191 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 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 09:22:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:42,745 INFO L93 Difference]: Finished difference Result 367 states and 414 transitions. [2021-10-28 09:22:42,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 09:22:42,745 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 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 39 [2021-10-28 09:22:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:42,747 INFO L225 Difference]: With dead ends: 367 [2021-10-28 09:22:42,748 INFO L226 Difference]: Without dead ends: 365 [2021-10-28 09:22:42,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=604, Invalid=2818, Unknown=0, NotChecked=0, Total=3422 [2021-10-28 09:22:42,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-10-28 09:22:42,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 192. [2021-10-28 09:22:42,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 173 states have (on average 1.329479768786127) internal successors, (230), 188 states have internal predecessors, (230), 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 09:22:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 233 transitions. [2021-10-28 09:22:42,756 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 233 transitions. Word has length 39 [2021-10-28 09:22:42,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:42,756 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 233 transitions. [2021-10-28 09:22:42,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 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 09:22:42,757 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 233 transitions. [2021-10-28 09:22:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 09:22:42,757 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:42,758 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:42,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:42,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:42,974 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:42,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:42,974 INFO L85 PathProgramCache]: Analyzing trace with hash 410314524, now seen corresponding path program 1 times [2021-10-28 09:22:42,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:42,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832564997] [2021-10-28 09:22:42,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:42,976 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:43,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:22:43,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:43,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832564997] [2021-10-28 09:22:43,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832564997] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:43,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658734870] [2021-10-28 09:22:43,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:43,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:43,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:43,080 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:43,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 09:22:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:43,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-28 09:22:43,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:43,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:22:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:43,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658734870] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:43,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:22:43,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-28 09:22:43,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707003916] [2021-10-28 09:22:43,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 09:22:43,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:43,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:22:43,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:22:43,603 INFO L87 Difference]: Start difference. First operand 192 states and 233 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 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 09:22:43,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:43,859 INFO L93 Difference]: Finished difference Result 428 states and 517 transitions. [2021-10-28 09:22:43,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 09:22:43,859 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 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 40 [2021-10-28 09:22:43,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:43,861 INFO L225 Difference]: With dead ends: 428 [2021-10-28 09:22:43,862 INFO L226 Difference]: Without dead ends: 428 [2021-10-28 09:22:43,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-10-28 09:22:43,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-10-28 09:22:43,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 258. [2021-10-28 09:22:43,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 239 states have (on average 1.397489539748954) internal successors, (334), 254 states have internal predecessors, (334), 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 09:22:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 337 transitions. [2021-10-28 09:22:43,870 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 337 transitions. Word has length 40 [2021-10-28 09:22:43,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:43,871 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 337 transitions. [2021-10-28 09:22:43,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 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 09:22:43,871 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 337 transitions. [2021-10-28 09:22:43,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 09:22:43,872 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:43,872 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:43,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:44,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-28 09:22:44,091 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:44,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:44,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1936269525, now seen corresponding path program 1 times [2021-10-28 09:22:44,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:44,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236142659] [2021-10-28 09:22:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:44,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:44,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:44,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 09:22:44,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:44,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236142659] [2021-10-28 09:22:44,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236142659] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:22:44,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:22:44,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 09:22:44,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77313037] [2021-10-28 09:22:44,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:22:44,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:44,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:22:44,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:22:44,167 INFO L87 Difference]: Start difference. First operand 258 states and 337 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 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 09:22:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:44,312 INFO L93 Difference]: Finished difference Result 257 states and 335 transitions. [2021-10-28 09:22:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:22:44,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 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 41 [2021-10-28 09:22:44,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:44,314 INFO L225 Difference]: With dead ends: 257 [2021-10-28 09:22:44,314 INFO L226 Difference]: Without dead ends: 257 [2021-10-28 09:22:44,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:22:44,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-10-28 09:22:44,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2021-10-28 09:22:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 237 states have (on average 1.3966244725738397) internal successors, (331), 252 states have internal predecessors, (331), 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 09:22:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 334 transitions. [2021-10-28 09:22:44,321 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 334 transitions. Word has length 41 [2021-10-28 09:22:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:44,321 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 334 transitions. [2021-10-28 09:22:44,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 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 09:22:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 334 transitions. [2021-10-28 09:22:44,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-28 09:22:44,322 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:44,322 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:44,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-28 09:22:44,323 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:44,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:44,323 INFO L85 PathProgramCache]: Analyzing trace with hash -797753589, now seen corresponding path program 1 times [2021-10-28 09:22:44,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:44,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634839660] [2021-10-28 09:22:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:44,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:44,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:44,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:44,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634839660] [2021-10-28 09:22:44,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634839660] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:44,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285673414] [2021-10-28 09:22:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:44,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:44,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:44,590 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:44,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 09:22:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:45,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 09:22:45,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:45,242 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:22:45,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:22:45,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:22:45,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 09:22:45,384 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-10-28 09:22:45,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 84 [2021-10-28 09:22:45,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 75 [2021-10-28 09:22:45,401 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-10-28 09:22:45,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 59 [2021-10-28 09:22:45,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2021-10-28 09:22:45,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-28 09:22:45,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-28 09:22:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:45,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285673414] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:45,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:22:45,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-10-28 09:22:45,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194313829] [2021-10-28 09:22:45,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-28 09:22:45,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:45,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 09:22:45,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:22:45,551 INFO L87 Difference]: Start difference. First operand 256 states and 334 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 09:22:46,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:46,203 INFO L93 Difference]: Finished difference Result 262 states and 309 transitions. [2021-10-28 09:22:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:22:46,204 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 42 [2021-10-28 09:22:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:46,205 INFO L225 Difference]: With dead ends: 262 [2021-10-28 09:22:46,205 INFO L226 Difference]: Without dead ends: 262 [2021-10-28 09:22:46,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-10-28 09:22:46,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-10-28 09:22:46,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 223. [2021-10-28 09:22:46,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 204 states have (on average 1.3137254901960784) internal successors, (268), 219 states have internal predecessors, (268), 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 09:22:46,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 271 transitions. [2021-10-28 09:22:46,211 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 271 transitions. Word has length 42 [2021-10-28 09:22:46,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:46,212 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 271 transitions. [2021-10-28 09:22:46,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 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 09:22:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 271 transitions. [2021-10-28 09:22:46,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-28 09:22:46,213 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:46,213 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:46,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:46,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:46,423 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:46,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1466980265, now seen corresponding path program 1 times [2021-10-28 09:22:46,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:46,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693347441] [2021-10-28 09:22:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:46,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:46,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:22:46,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:46,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693347441] [2021-10-28 09:22:46,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693347441] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:46,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404457025] [2021-10-28 09:22:46,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:46,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:46,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:46,607 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:46,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 09:22:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:47,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-28 09:22:47,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:47,294 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 09:22:47,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 09:22:47,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 09:22:47,613 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:22:47,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 39 [2021-10-28 09:22:47,933 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:22:47,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2021-10-28 09:22:48,162 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-28 09:22:48,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-10-28 09:22:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:48,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404457025] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:48,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:22:48,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 27 [2021-10-28 09:22:48,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062694816] [2021-10-28 09:22:48,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 09:22:48,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:48,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 09:22:48,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:22:48,197 INFO L87 Difference]: Start difference. First operand 223 states and 271 transitions. Second operand has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 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 09:22:50,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:50,494 INFO L93 Difference]: Finished difference Result 337 states and 385 transitions. [2021-10-28 09:22:50,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 09:22:50,494 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 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 42 [2021-10-28 09:22:50,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:50,496 INFO L225 Difference]: With dead ends: 337 [2021-10-28 09:22:50,496 INFO L226 Difference]: Without dead ends: 337 [2021-10-28 09:22:50,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=591, Invalid=3069, Unknown=0, NotChecked=0, Total=3660 [2021-10-28 09:22:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-10-28 09:22:50,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 231. [2021-10-28 09:22:50,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 212 states have (on average 1.3018867924528301) internal successors, (276), 227 states have internal predecessors, (276), 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 09:22:50,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 279 transitions. [2021-10-28 09:22:50,504 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 279 transitions. Word has length 42 [2021-10-28 09:22:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:50,504 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 279 transitions. [2021-10-28 09:22:50,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.8518518518518516) internal successors, (77), 26 states have internal predecessors, (77), 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 09:22:50,505 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 279 transitions. [2021-10-28 09:22:50,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 09:22:50,505 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:50,506 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:50,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:50,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:50,711 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:50,713 INFO L85 PathProgramCache]: Analyzing trace with hash -961030053, now seen corresponding path program 2 times [2021-10-28 09:22:50,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:50,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543162983] [2021-10-28 09:22:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:50,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:51,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:51,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:51,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543162983] [2021-10-28 09:22:51,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543162983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:51,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789096969] [2021-10-28 09:22:51,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:22:51,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:51,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:51,033 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:51,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 09:22:51,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:22:51,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:22:51,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-28 09:22:51,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:51,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:22:51,735 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:22:51,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:22:51,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:51,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-28 09:22:51,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 09:22:51,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 8 [2021-10-28 09:22:51,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 09:22:51,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-28 09:22:52,044 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:22:52,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:22:52,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 09:22:52,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:52,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-10-28 09:22:52,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-10-28 09:22:52,377 INFO L354 Elim1Store]: treesize reduction 52, result has 30.7 percent of original size [2021-10-28 09:22:52,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 44 [2021-10-28 09:22:52,634 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:22:52,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-10-28 09:22:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:52,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789096969] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:52,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:22:52,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-10-28 09:22:52,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355289114] [2021-10-28 09:22:52,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 09:22:52,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:52,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 09:22:52,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:22:52,642 INFO L87 Difference]: Start difference. First operand 231 states and 279 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 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 09:22:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:22:53,619 INFO L93 Difference]: Finished difference Result 438 states and 523 transitions. [2021-10-28 09:22:53,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 09:22:53,624 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 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 47 [2021-10-28 09:22:53,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:22:53,627 INFO L225 Difference]: With dead ends: 438 [2021-10-28 09:22:53,627 INFO L226 Difference]: Without dead ends: 438 [2021-10-28 09:22:53,628 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=398, Invalid=1954, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 09:22:53,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-10-28 09:22:53,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 277. [2021-10-28 09:22:53,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 258 states have (on average 1.2868217054263567) internal successors, (332), 273 states have internal predecessors, (332), 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 09:22:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 335 transitions. [2021-10-28 09:22:53,637 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 335 transitions. Word has length 47 [2021-10-28 09:22:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:22:53,637 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 335 transitions. [2021-10-28 09:22:53,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 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 09:22:53,637 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 335 transitions. [2021-10-28 09:22:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 09:22:53,638 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:22:53,638 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:22:53,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 09:22:53,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 09:22:53,849 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:22:53,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:22:53,851 INFO L85 PathProgramCache]: Analyzing trace with hash -667307151, now seen corresponding path program 1 times [2021-10-28 09:22:53,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:22:53,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729790119] [2021-10-28 09:22:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:53,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:22:53,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:54,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:22:54,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:54,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:22:54,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729790119] [2021-10-28 09:22:54,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729790119] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:54,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100061515] [2021-10-28 09:22:54,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:22:54,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:22:54,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:22:54,173 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:22:54,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 09:22:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:22:54,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-28 09:22:54,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:22:54,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:22:54,930 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 09:22:54,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 09:22:55,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:55,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-28 09:22:55,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 09:22:55,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-10-28 09:22:55,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 09:22:55,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-28 09:22:55,360 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 09:22:55,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 09:22:55,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-28 09:22:55,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:22:55,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-10-28 09:22:55,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-10-28 09:22:55,714 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-10-28 09:22:55,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2021-10-28 09:22:56,108 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-28 09:22:56,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-10-28 09:22:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:22:56,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100061515] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:22:56,114 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:22:56,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-10-28 09:22:56,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420090699] [2021-10-28 09:22:56,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 09:22:56,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:22:56,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 09:22:56,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=843, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:22:56,116 INFO L87 Difference]: Start difference. First operand 277 states and 335 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 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 09:23:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:07,873 INFO L93 Difference]: Finished difference Result 583 states and 695 transitions. [2021-10-28 09:23:07,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-28 09:23:07,874 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 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 47 [2021-10-28 09:23:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:07,877 INFO L225 Difference]: With dead ends: 583 [2021-10-28 09:23:07,877 INFO L226 Difference]: Without dead ends: 583 [2021-10-28 09:23:07,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=684, Invalid=3348, Unknown=0, NotChecked=0, Total=4032 [2021-10-28 09:23:07,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2021-10-28 09:23:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 281. [2021-10-28 09:23:07,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 262 states have (on average 1.2786259541984732) internal successors, (335), 277 states have internal predecessors, (335), 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 09:23:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 338 transitions. [2021-10-28 09:23:07,888 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 338 transitions. Word has length 47 [2021-10-28 09:23:07,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:07,888 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 338 transitions. [2021-10-28 09:23:07,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 31 states have internal predecessors, (85), 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 09:23:07,889 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 338 transitions. [2021-10-28 09:23:07,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 09:23:07,889 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:07,889 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:07,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:08,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 09:23:08,116 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:23:08,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:08,117 INFO L85 PathProgramCache]: Analyzing trace with hash -667614981, now seen corresponding path program 1 times [2021-10-28 09:23:08,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:08,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252044511] [2021-10-28 09:23:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:08,118 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:08,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:08,586 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:08,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:08,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252044511] [2021-10-28 09:23:08,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252044511] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:08,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869035294] [2021-10-28 09:23:08,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:08,587 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:08,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:08,587 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:23:08,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 09:23:09,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:09,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-28 09:23:09,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:09,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:23:09,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:09,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 09:23:09,400 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 09:23:09,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 09:23:09,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 09:23:09,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:09,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:09,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:09,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-28 09:23:09,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-10-28 09:23:09,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:09,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-28 09:23:09,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:09,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-10-28 09:23:09,934 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 09:23:09,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 09:23:10,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:10,013 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-28 09:23:10,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-10-28 09:23:10,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-28 09:23:10,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 23 [2021-10-28 09:23:10,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:10,340 INFO L354 Elim1Store]: treesize reduction 104, result has 18.8 percent of original size [2021-10-28 09:23:10,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 52 [2021-10-28 09:23:10,689 INFO L354 Elim1Store]: treesize reduction 74, result has 1.3 percent of original size [2021-10-28 09:23:10,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 34 [2021-10-28 09:23:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:10,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869035294] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:10,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:23:10,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-10-28 09:23:10,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640599207] [2021-10-28 09:23:10,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 09:23:10,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:10,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 09:23:10,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 09:23:10,717 INFO L87 Difference]: Start difference. First operand 281 states and 338 transitions. Second operand has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 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 09:23:25,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:25,425 INFO L93 Difference]: Finished difference Result 542 states and 644 transitions. [2021-10-28 09:23:25,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-28 09:23:25,426 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 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 47 [2021-10-28 09:23:25,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:25,429 INFO L225 Difference]: With dead ends: 542 [2021-10-28 09:23:25,429 INFO L226 Difference]: Without dead ends: 542 [2021-10-28 09:23:25,431 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=765, Invalid=3791, Unknown=0, NotChecked=0, Total=4556 [2021-10-28 09:23:25,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-10-28 09:23:25,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 275. [2021-10-28 09:23:25,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 256 states have (on average 1.26171875) internal successors, (323), 271 states have internal predecessors, (323), 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 09:23:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 326 transitions. [2021-10-28 09:23:25,440 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 326 transitions. Word has length 47 [2021-10-28 09:23:25,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:25,440 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 326 transitions. [2021-10-28 09:23:25,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 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 09:23:25,441 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 326 transitions. [2021-10-28 09:23:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 09:23:25,442 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:25,442 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:25,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-28 09:23:25,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-28 09:23:25,666 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr16REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:23:25,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:25,667 INFO L85 PathProgramCache]: Analyzing trace with hash -131914094, now seen corresponding path program 2 times [2021-10-28 09:23:25,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:25,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956170212] [2021-10-28 09:23:25,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:25,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:26,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:26,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:26,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956170212] [2021-10-28 09:23:26,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956170212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:26,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409062899] [2021-10-28 09:23:26,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:23:26,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:26,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:26,019 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:23:26,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 09:23:26,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:23:26,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:23:26,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-28 09:23:26,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:26,865 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:23:26,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:23:26,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 09:23:27,037 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-28 09:23:27,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 17 [2021-10-28 09:23:27,095 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:23:27,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2021-10-28 09:23:27,119 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:23:27,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:23:27,194 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:23:27,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2021-10-28 09:23:27,405 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-10-28 09:23:27,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 59 [2021-10-28 09:23:27,618 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-10-28 09:23:27,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 25 [2021-10-28 09:23:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:27,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409062899] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:27,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:23:27,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-10-28 09:23:27,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766998780] [2021-10-28 09:23:27,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 09:23:27,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:27,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 09:23:27,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:23:27,626 INFO L87 Difference]: Start difference. First operand 275 states and 326 transitions. Second operand has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 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 09:23:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:29,206 INFO L93 Difference]: Finished difference Result 352 states and 411 transitions. [2021-10-28 09:23:29,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 09:23:29,207 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 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 49 [2021-10-28 09:23:29,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:29,209 INFO L225 Difference]: With dead ends: 352 [2021-10-28 09:23:29,209 INFO L226 Difference]: Without dead ends: 352 [2021-10-28 09:23:29,210 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=390, Invalid=1962, Unknown=0, NotChecked=0, Total=2352 [2021-10-28 09:23:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-10-28 09:23:29,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 275. [2021-10-28 09:23:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 256 states have (on average 1.2578125) internal successors, (322), 271 states have internal predecessors, (322), 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 09:23:29,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 325 transitions. [2021-10-28 09:23:29,217 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 325 transitions. Word has length 49 [2021-10-28 09:23:29,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:29,217 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 325 transitions. [2021-10-28 09:23:29,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 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 09:23:29,218 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 325 transitions. [2021-10-28 09:23:29,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 09:23:29,219 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:29,219 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:29,255 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-28 09:23:29,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-28 09:23:29,433 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr17REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:23:29,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:29,434 INFO L85 PathProgramCache]: Analyzing trace with hash -131914093, now seen corresponding path program 2 times [2021-10-28 09:23:29,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:29,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881356591] [2021-10-28 09:23:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:29,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:29,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:29,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:29,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881356591] [2021-10-28 09:23:29,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881356591] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:29,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037947426] [2021-10-28 09:23:29,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:23:29,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:29,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:29,840 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:23:29,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 09:23:30,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:23:30,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:23:30,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-28 09:23:30,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:30,903 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:23:30,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:23:30,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:23:30,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 09:23:31,231 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-28 09:23:31,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 57 [2021-10-28 09:23:31,243 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-28 09:23:31,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 32 [2021-10-28 09:23:31,415 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:23:31,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 47 [2021-10-28 09:23:31,428 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:23:31,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 38 [2021-10-28 09:23:31,524 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:23:31,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:23:31,644 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:23:31,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 64 [2021-10-28 09:23:31,657 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:23:31,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 45 [2021-10-28 09:23:32,118 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-10-28 09:23:32,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 94 [2021-10-28 09:23:32,132 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:23:32,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 80 [2021-10-28 09:23:32,444 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-10-28 09:23:32,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 43 [2021-10-28 09:23:32,451 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-10-28 09:23:32,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2021-10-28 09:23:32,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:32,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037947426] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:32,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:23:32,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 31 [2021-10-28 09:23:32,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677792058] [2021-10-28 09:23:32,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-28 09:23:32,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:32,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-28 09:23:32,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-10-28 09:23:32,465 INFO L87 Difference]: Start difference. First operand 275 states and 325 transitions. Second operand has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 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 09:23:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:35,273 INFO L93 Difference]: Finished difference Result 366 states and 421 transitions. [2021-10-28 09:23:35,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-28 09:23:35,274 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 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 49 [2021-10-28 09:23:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:35,276 INFO L225 Difference]: With dead ends: 366 [2021-10-28 09:23:35,276 INFO L226 Difference]: Without dead ends: 366 [2021-10-28 09:23:35,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=334, Invalid=1922, Unknown=0, NotChecked=0, Total=2256 [2021-10-28 09:23:35,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-10-28 09:23:35,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 272. [2021-10-28 09:23:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 253 states have (on average 1.2371541501976284) internal successors, (313), 268 states have internal predecessors, (313), 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 09:23:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 316 transitions. [2021-10-28 09:23:35,284 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 316 transitions. Word has length 49 [2021-10-28 09:23:35,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:35,284 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 316 transitions. [2021-10-28 09:23:35,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.870967741935484) internal successors, (89), 31 states have internal predecessors, (89), 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 09:23:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 316 transitions. [2021-10-28 09:23:35,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-28 09:23:35,286 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:35,286 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:35,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:35,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-28 09:23:35,506 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr34REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:23:35,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:35,507 INFO L85 PathProgramCache]: Analyzing trace with hash -421529196, now seen corresponding path program 1 times [2021-10-28 09:23:35,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:35,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564454774] [2021-10-28 09:23:35,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:35,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:35,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:35,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:35,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564454774] [2021-10-28 09:23:35,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564454774] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:35,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031105703] [2021-10-28 09:23:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:35,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:35,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:35,867 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:23:35,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 09:23:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:36,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-28 09:23:36,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:36,849 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:23:36,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:23:36,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:23:36,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 09:23:36,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:23:37,161 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:23:37,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 63 [2021-10-28 09:23:37,172 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-10-28 09:23:37,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 40 [2021-10-28 09:23:37,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:23:37,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 49 [2021-10-28 09:23:37,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:23:37,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2021-10-28 09:23:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:23:37,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031105703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:37,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:23:37,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2021-10-28 09:23:37,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764767970] [2021-10-28 09:23:37,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-28 09:23:37,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:37,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-28 09:23:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2021-10-28 09:23:37,781 INFO L87 Difference]: Start difference. First operand 272 states and 316 transitions. Second operand has 30 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 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 09:23:39,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:39,179 INFO L93 Difference]: Finished difference Result 321 states and 363 transitions. [2021-10-28 09:23:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 09:23:39,179 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 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 50 [2021-10-28 09:23:39,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:39,181 INFO L225 Difference]: With dead ends: 321 [2021-10-28 09:23:39,181 INFO L226 Difference]: Without dead ends: 321 [2021-10-28 09:23:39,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=405, Invalid=1757, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 09:23:39,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-10-28 09:23:39,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 277. [2021-10-28 09:23:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 258 states have (on average 1.2325581395348837) internal successors, (318), 273 states have internal predecessors, (318), 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 09:23:39,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 321 transitions. [2021-10-28 09:23:39,189 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 321 transitions. Word has length 50 [2021-10-28 09:23:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:39,189 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 321 transitions. [2021-10-28 09:23:39,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.0689655172413794) internal successors, (89), 29 states have internal predecessors, (89), 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 09:23:39,190 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 321 transitions. [2021-10-28 09:23:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 09:23:39,190 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:39,191 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:39,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:39,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:39,399 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:23:39,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:39,401 INFO L85 PathProgramCache]: Analyzing trace with hash -438746489, now seen corresponding path program 2 times [2021-10-28 09:23:39,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:39,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119640185] [2021-10-28 09:23:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:39,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:39,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:39,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:39,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:39,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119640185] [2021-10-28 09:23:39,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119640185] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:39,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291419368] [2021-10-28 09:23:39,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:23:39,727 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:39,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:39,728 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:23:39,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 09:23:40,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:23:40,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:23:40,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 09:23:40,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:40,828 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:23:40,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:23:40,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-28 09:23:41,066 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-28 09:23:41,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 27 [2021-10-28 09:23:41,176 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:23:41,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 27 [2021-10-28 09:23:41,228 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:23:41,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:23:41,294 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:23:41,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 40 [2021-10-28 09:23:41,627 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-10-28 09:23:41,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 64 [2021-10-28 09:23:41,801 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:23:41,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 30 [2021-10-28 09:23:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:41,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291419368] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:41,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:23:41,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2021-10-28 09:23:41,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898128319] [2021-10-28 09:23:41,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-28 09:23:41,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:41,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-28 09:23:41,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 09:23:41,883 INFO L87 Difference]: Start difference. First operand 277 states and 321 transitions. Second operand has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 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 09:23:44,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:44,744 INFO L93 Difference]: Finished difference Result 487 states and 550 transitions. [2021-10-28 09:23:44,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-28 09:23:44,745 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 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 52 [2021-10-28 09:23:44,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:44,746 INFO L225 Difference]: With dead ends: 487 [2021-10-28 09:23:44,747 INFO L226 Difference]: Without dead ends: 485 [2021-10-28 09:23:44,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=932, Invalid=5874, Unknown=0, NotChecked=0, Total=6806 [2021-10-28 09:23:44,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-10-28 09:23:44,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 300. [2021-10-28 09:23:44,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 281 states have (on average 1.2597864768683273) internal successors, (354), 296 states have internal predecessors, (354), 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 09:23:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 357 transitions. [2021-10-28 09:23:44,757 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 357 transitions. Word has length 52 [2021-10-28 09:23:44,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:44,757 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 357 transitions. [2021-10-28 09:23:44,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 32 states have internal predecessors, (93), 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 09:23:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 357 transitions. [2021-10-28 09:23:44,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 09:23:44,759 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:44,759 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:44,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:44,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-28 09:23:44,983 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr41ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:23:44,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:44,983 INFO L85 PathProgramCache]: Analyzing trace with hash 708201269, now seen corresponding path program 1 times [2021-10-28 09:23:44,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:44,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861930306] [2021-10-28 09:23:44,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:44,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:45,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:45,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:45,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861930306] [2021-10-28 09:23:45,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861930306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:45,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368165754] [2021-10-28 09:23:45,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:45,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:45,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:45,206 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:23:45,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 09:23:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:46,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-28 09:23:46,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:46,360 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:23:46,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:23:46,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-28 09:23:46,568 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:23:46,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 37 [2021-10-28 09:23:46,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:23:46,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 29 [2021-10-28 09:23:47,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:23:47,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368165754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:47,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:23:47,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-10-28 09:23:47,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51293329] [2021-10-28 09:23:47,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-28 09:23:47,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:47,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-28 09:23:47,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-10-28 09:23:47,088 INFO L87 Difference]: Start difference. First operand 300 states and 357 transitions. Second operand has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 26 states have internal predecessors, (92), 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 09:23:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:48,450 INFO L93 Difference]: Finished difference Result 353 states and 409 transitions. [2021-10-28 09:23:48,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 09:23:48,451 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 26 states have internal predecessors, (92), 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 53 [2021-10-28 09:23:48,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:48,452 INFO L225 Difference]: With dead ends: 353 [2021-10-28 09:23:48,452 INFO L226 Difference]: Without dead ends: 353 [2021-10-28 09:23:48,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=493, Invalid=2369, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 09:23:48,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-10-28 09:23:48,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 298. [2021-10-28 09:23:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 279 states have (on average 1.2616487455197132) internal successors, (352), 294 states have internal predecessors, (352), 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 09:23:48,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 355 transitions. [2021-10-28 09:23:48,460 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 355 transitions. Word has length 53 [2021-10-28 09:23:48,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:48,461 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 355 transitions. [2021-10-28 09:23:48,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.5384615384615383) internal successors, (92), 26 states have internal predecessors, (92), 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 09:23:48,461 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 355 transitions. [2021-10-28 09:23:48,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 09:23:48,462 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:48,462 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:48,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-28 09:23:48,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:48,680 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:23:48,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:48,682 INFO L85 PathProgramCache]: Analyzing trace with hash -562890213, now seen corresponding path program 2 times [2021-10-28 09:23:48,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:48,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043285306] [2021-10-28 09:23:48,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:48,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:48,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:49,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:49,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:49,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:49,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043285306] [2021-10-28 09:23:49,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043285306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:49,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093856016] [2021-10-28 09:23:49,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:23:49,310 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:49,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:49,312 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:23:49,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-28 09:23:50,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:23:50,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:23:50,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 09:23:50,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:50,464 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 09:23:50,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 09:23:50,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 09:23:50,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-28 09:23:50,865 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 09:23:50,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2021-10-28 09:23:50,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:23:50,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:50,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-10-28 09:23:51,078 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 09:23:51,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-10-28 09:23:51,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:51,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-10-28 09:23:51,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:51,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-10-28 09:23:51,203 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 09:23:51,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 09:23:51,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-28 09:23:51,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:51,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:51,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:51,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2021-10-28 09:23:51,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-10-28 09:23:51,784 INFO L354 Elim1Store]: treesize reduction 76, result has 18.3 percent of original size [2021-10-28 09:23:51,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 102 [2021-10-28 09:23:51,795 INFO L354 Elim1Store]: treesize reduction 59, result has 10.6 percent of original size [2021-10-28 09:23:51,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 151 treesize of output 105 [2021-10-28 09:23:51,812 INFO L354 Elim1Store]: treesize reduction 128, result has 16.3 percent of original size [2021-10-28 09:23:51,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 98 [2021-10-28 09:23:52,175 INFO L354 Elim1Store]: treesize reduction 10, result has 28.6 percent of original size [2021-10-28 09:23:52,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 67 [2021-10-28 09:23:52,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 49 [2021-10-28 09:23:52,424 INFO L354 Elim1Store]: treesize reduction 70, result has 4.1 percent of original size [2021-10-28 09:23:52,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 33 [2021-10-28 09:23:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:52,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093856016] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:52,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:23:52,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2021-10-28 09:23:52,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699171797] [2021-10-28 09:23:52,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-28 09:23:52,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:52,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-28 09:23:52,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1590, Unknown=2, NotChecked=0, Total=1806 [2021-10-28 09:23:52,456 INFO L87 Difference]: Start difference. First operand 298 states and 355 transitions. Second operand has 43 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 42 states have internal predecessors, (100), 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 09:23:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:54,299 INFO L93 Difference]: Finished difference Result 455 states and 532 transitions. [2021-10-28 09:23:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 09:23:54,305 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 42 states have internal predecessors, (100), 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 55 [2021-10-28 09:23:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:54,306 INFO L225 Difference]: With dead ends: 455 [2021-10-28 09:23:54,306 INFO L226 Difference]: Without dead ends: 455 [2021-10-28 09:23:54,308 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=394, Invalid=2684, Unknown=2, NotChecked=0, Total=3080 [2021-10-28 09:23:54,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-10-28 09:23:54,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 336. [2021-10-28 09:23:54,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 317 states have (on average 1.249211356466877) internal successors, (396), 332 states have internal predecessors, (396), 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 09:23:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 399 transitions. [2021-10-28 09:23:54,315 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 399 transitions. Word has length 55 [2021-10-28 09:23:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:54,316 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 399 transitions. [2021-10-28 09:23:54,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 42 states have internal predecessors, (100), 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 09:23:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 399 transitions. [2021-10-28 09:23:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 09:23:54,317 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:54,317 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:54,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:54,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:54,543 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:23:54,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:54,545 INFO L85 PathProgramCache]: Analyzing trace with hash -563198043, now seen corresponding path program 1 times [2021-10-28 09:23:54,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:54,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244647362] [2021-10-28 09:23:54,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:54,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:55,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:23:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:55,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:23:55,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244647362] [2021-10-28 09:23:55,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244647362] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:55,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553900543] [2021-10-28 09:23:55,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:55,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:23:55,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:23:55,074 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:23:55,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-28 09:23:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:23:56,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-28 09:23:56,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:23:56,455 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 09:23:56,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 09:23:56,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 09:23:56,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-28 09:23:56,772 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 09:23:56,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 20 [2021-10-28 09:23:56,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:56,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 14 [2021-10-28 09:23:56,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:23:56,902 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 09:23:56,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-10-28 09:23:56,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:56,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2021-10-28 09:23:56,988 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 09:23:56,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 09:23:57,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-28 09:23:57,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:57,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-28 09:23:57,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:23:57,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 09:23:57,405 INFO L354 Elim1Store]: treesize reduction 92, result has 18.6 percent of original size [2021-10-28 09:23:57,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 223 treesize of output 97 [2021-10-28 09:23:57,432 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-10-28 09:23:57,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 122 [2021-10-28 09:23:57,442 INFO L354 Elim1Store]: treesize reduction 77, result has 16.3 percent of original size [2021-10-28 09:23:57,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 94 [2021-10-28 09:23:57,723 INFO L354 Elim1Store]: treesize reduction 14, result has 22.2 percent of original size [2021-10-28 09:23:57,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 58 [2021-10-28 09:23:57,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 36 [2021-10-28 09:23:57,926 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:23:57,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2021-10-28 09:23:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:23:57,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553900543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:23:57,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:23:57,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 37 [2021-10-28 09:23:57,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110293655] [2021-10-28 09:23:57,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 09:23:57,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:23:57,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 09:23:57,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 09:23:57,933 INFO L87 Difference]: Start difference. First operand 336 states and 399 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 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 09:23:59,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:23:59,736 INFO L93 Difference]: Finished difference Result 483 states and 560 transitions. [2021-10-28 09:23:59,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 09:23:59,736 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 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 55 [2021-10-28 09:23:59,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:23:59,738 INFO L225 Difference]: With dead ends: 483 [2021-10-28 09:23:59,738 INFO L226 Difference]: Without dead ends: 483 [2021-10-28 09:23:59,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=403, Invalid=2459, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 09:23:59,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-10-28 09:23:59,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 336. [2021-10-28 09:23:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 317 states have (on average 1.249211356466877) internal successors, (396), 332 states have internal predecessors, (396), 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 09:23:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 399 transitions. [2021-10-28 09:23:59,754 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 399 transitions. Word has length 55 [2021-10-28 09:23:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:23:59,755 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 399 transitions. [2021-10-28 09:23:59,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 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 09:23:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 399 transitions. [2021-10-28 09:23:59,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 09:23:59,756 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:23:59,757 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:23:59,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:23:59,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-28 09:23:59,971 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:23:59,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:23:59,971 INFO L85 PathProgramCache]: Analyzing trace with hash 105311611, now seen corresponding path program 1 times [2021-10-28 09:23:59,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:23:59,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385787272] [2021-10-28 09:23:59,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:23:59,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:23:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:00,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:24:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:00,556 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:00,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:00,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385787272] [2021-10-28 09:24:00,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385787272] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:00,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707579664] [2021-10-28 09:24:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:00,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:00,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:00,558 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:00,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-28 09:24:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:01,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 63 conjunts are in the unsatisfiable core [2021-10-28 09:24:01,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:02,092 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 09:24:02,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 09:24:02,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:24:02,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 09:24:02,386 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 09:24:02,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2021-10-28 09:24:02,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:24:02,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-10-28 09:24:02,514 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 09:24:02,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2021-10-28 09:24:02,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-28 09:24:02,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2021-10-28 09:24:02,595 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 09:24:02,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 09:24:02,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 09:24:02,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:24:02,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-28 09:24:02,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-28 09:24:03,012 INFO L354 Elim1Store]: treesize reduction 112, result has 15.8 percent of original size [2021-10-28 09:24:03,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 303 treesize of output 156 [2021-10-28 09:24:03,030 INFO L354 Elim1Store]: treesize reduction 104, result has 15.4 percent of original size [2021-10-28 09:24:03,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 218 treesize of output 141 [2021-10-28 09:24:03,041 INFO L354 Elim1Store]: treesize reduction 77, result has 16.3 percent of original size [2021-10-28 09:24:03,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 104 [2021-10-28 09:24:03,271 INFO L354 Elim1Store]: treesize reduction 14, result has 22.2 percent of original size [2021-10-28 09:24:03,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 60 [2021-10-28 09:24:03,280 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-28 09:24:03,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 37 [2021-10-28 09:24:03,396 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:24:03,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-10-28 09:24:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:03,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707579664] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:03,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:03,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 37 [2021-10-28 09:24:03,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607930524] [2021-10-28 09:24:03,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-28 09:24:03,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:03,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-28 09:24:03,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-10-28 09:24:03,409 INFO L87 Difference]: Start difference. First operand 336 states and 399 transitions. Second operand has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 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 09:24:05,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:05,123 INFO L93 Difference]: Finished difference Result 485 states and 560 transitions. [2021-10-28 09:24:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-28 09:24:05,124 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 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 55 [2021-10-28 09:24:05,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:05,126 INFO L225 Difference]: With dead ends: 485 [2021-10-28 09:24:05,126 INFO L226 Difference]: Without dead ends: 485 [2021-10-28 09:24:05,126 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=403, Invalid=2459, Unknown=0, NotChecked=0, Total=2862 [2021-10-28 09:24:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-10-28 09:24:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 338. [2021-10-28 09:24:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 319 states have (on average 1.2476489028213167) internal successors, (398), 334 states have internal predecessors, (398), 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 09:24:05,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 401 transitions. [2021-10-28 09:24:05,133 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 401 transitions. Word has length 55 [2021-10-28 09:24:05,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:05,133 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 401 transitions. [2021-10-28 09:24:05,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.72972972972973) internal successors, (101), 36 states have internal predecessors, (101), 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 09:24:05,134 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 401 transitions. [2021-10-28 09:24:05,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 09:24:05,135 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:05,135 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:05,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:05,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-28 09:24:05,353 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr43ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:24:05,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:05,354 INFO L85 PathProgramCache]: Analyzing trace with hash 105003781, now seen corresponding path program 1 times [2021-10-28 09:24:05,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:05,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195069662] [2021-10-28 09:24:05,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:05,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:06,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:24:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:06,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:06,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195069662] [2021-10-28 09:24:06,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195069662] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:06,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216739752] [2021-10-28 09:24:06,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:06,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:06,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:06,075 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:06,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-28 09:24:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:07,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-28 09:24:07,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:07,625 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 09:24:07,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-10-28 09:24:07,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-28 09:24:07,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-28 09:24:07,953 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-28 09:24:07,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 14 [2021-10-28 09:24:07,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-28 09:24:07,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:24:07,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2021-10-28 09:24:08,202 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-28 09:24:08,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2021-10-28 09:24:08,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2021-10-28 09:24:08,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:24:08,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-28 09:24:08,305 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-28 09:24:08,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 09:24:08,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:24:08,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:24:08,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:24:08,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-28 09:24:08,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-10-28 09:24:08,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-10-28 09:24:08,727 INFO L354 Elim1Store]: treesize reduction 92, result has 18.6 percent of original size [2021-10-28 09:24:08,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 240 treesize of output 110 [2021-10-28 09:24:08,747 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-10-28 09:24:08,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 183 treesize of output 135 [2021-10-28 09:24:08,764 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-10-28 09:24:08,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 126 treesize of output 114 [2021-10-28 09:24:09,084 INFO L354 Elim1Store]: treesize reduction 14, result has 22.2 percent of original size [2021-10-28 09:24:09,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 71 [2021-10-28 09:24:09,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 45 [2021-10-28 09:24:09,250 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-10-28 09:24:09,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 23 [2021-10-28 09:24:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:09,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216739752] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:09,259 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:09,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 40 [2021-10-28 09:24:09,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126936623] [2021-10-28 09:24:09,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-28 09:24:09,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:09,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-28 09:24:09,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1361, Unknown=0, NotChecked=0, Total=1560 [2021-10-28 09:24:09,260 INFO L87 Difference]: Start difference. First operand 338 states and 401 transitions. Second operand has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 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 09:24:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:11,165 INFO L93 Difference]: Finished difference Result 451 states and 525 transitions. [2021-10-28 09:24:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-28 09:24:11,167 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 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 55 [2021-10-28 09:24:11,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:11,169 INFO L225 Difference]: With dead ends: 451 [2021-10-28 09:24:11,169 INFO L226 Difference]: Without dead ends: 451 [2021-10-28 09:24:11,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2021-10-28 09:24:11,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-10-28 09:24:11,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 336. [2021-10-28 09:24:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 317 states have (on average 1.2429022082018928) internal successors, (394), 332 states have internal predecessors, (394), 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 09:24:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 397 transitions. [2021-10-28 09:24:11,178 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 397 transitions. Word has length 55 [2021-10-28 09:24:11,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:11,178 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 397 transitions. [2021-10-28 09:24:11,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 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 09:24:11,178 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 397 transitions. [2021-10-28 09:24:11,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 09:24:11,179 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:11,180 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:11,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:11,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-28 09:24:11,405 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:24:11,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:11,406 INFO L85 PathProgramCache]: Analyzing trace with hash -566843399, now seen corresponding path program 1 times [2021-10-28 09:24:11,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:11,407 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112014199] [2021-10-28 09:24:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:11,407 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:11,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:11,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:24:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 09:24:11,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:11,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112014199] [2021-10-28 09:24:11,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112014199] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:11,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726230320] [2021-10-28 09:24:11,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:11,738 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:11,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:11,743 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:11,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-28 09:24:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:13,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-28 09:24:13,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:13,602 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:24:13,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:24:13,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-10-28 09:24:13,813 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-28 09:24:13,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 23 [2021-10-28 09:24:13,922 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:24:13,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 23 [2021-10-28 09:24:13,979 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:24:13,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:24:14,038 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:24:14,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 36 [2021-10-28 09:24:14,303 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-10-28 09:24:14,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 65 [2021-10-28 09:24:14,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:24:14,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 31 [2021-10-28 09:24:14,771 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 09:24:14,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-28 09:24:14,809 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:14,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726230320] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:14,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:14,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 35 [2021-10-28 09:24:14,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540912779] [2021-10-28 09:24:14,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 09:24:14,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:14,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 09:24:14,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 09:24:14,810 INFO L87 Difference]: Start difference. First operand 336 states and 397 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 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 09:24:18,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:18,956 INFO L93 Difference]: Finished difference Result 539 states and 614 transitions. [2021-10-28 09:24:18,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-28 09:24:18,956 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 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 55 [2021-10-28 09:24:18,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:18,959 INFO L225 Difference]: With dead ends: 539 [2021-10-28 09:24:18,959 INFO L226 Difference]: Without dead ends: 539 [2021-10-28 09:24:18,959 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1083, Invalid=6927, Unknown=0, NotChecked=0, Total=8010 [2021-10-28 09:24:18,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-10-28 09:24:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 366. [2021-10-28 09:24:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 347 states have (on average 1.2593659942363113) internal successors, (437), 362 states have internal predecessors, (437), 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 09:24:18,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 440 transitions. [2021-10-28 09:24:18,967 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 440 transitions. Word has length 55 [2021-10-28 09:24:18,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:18,967 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 440 transitions. [2021-10-28 09:24:18,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 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 09:24:18,968 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 440 transitions. [2021-10-28 09:24:18,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-28 09:24:18,969 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:18,969 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:19,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:19,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:19,195 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr44ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:24:19,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:19,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1144862377, now seen corresponding path program 1 times [2021-10-28 09:24:19,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:19,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928729740] [2021-10-28 09:24:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:19,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:19,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 09:24:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:19,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:24:19,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:24:19,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928729740] [2021-10-28 09:24:19,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928729740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:19,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991261878] [2021-10-28 09:24:19,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:19,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:19,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:24:19,547 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:24:19,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-28 09:24:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:24:21,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-28 09:24:21,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:24:21,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-10-28 09:24:21,477 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 09:24:21,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 47 [2021-10-28 09:24:21,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:24:21,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 39 [2021-10-28 09:24:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 09:24:22,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991261878] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:24:22,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:24:22,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-10-28 09:24:22,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890131594] [2021-10-28 09:24:22,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 09:24:22,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:24:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 09:24:22,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-10-28 09:24:22,278 INFO L87 Difference]: Start difference. First operand 366 states and 440 transitions. Second operand has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:23,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:24:23,766 INFO L93 Difference]: Finished difference Result 391 states and 465 transitions. [2021-10-28 09:24:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 09:24:23,769 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-10-28 09:24:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:24:23,770 INFO L225 Difference]: With dead ends: 391 [2021-10-28 09:24:23,771 INFO L226 Difference]: Without dead ends: 386 [2021-10-28 09:24:23,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=230, Invalid=1750, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 09:24:23,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-10-28 09:24:23,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 362. [2021-10-28 09:24:23,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 343 states have (on average 1.2594752186588922) internal successors, (432), 358 states have internal predecessors, (432), 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 09:24:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 435 transitions. [2021-10-28 09:24:23,777 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 435 transitions. Word has length 56 [2021-10-28 09:24:23,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:24:23,778 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 435 transitions. [2021-10-28 09:24:23,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 09:24:23,778 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 435 transitions. [2021-10-28 09:24:23,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-28 09:24:23,779 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:24:23,779 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:23,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-28 09:24:23,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:24:23,998 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr33REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 40 more)] === [2021-10-28 09:24:23,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:24:23,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1802178581, now seen corresponding path program 1 times [2021-10-28 09:24:23,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:24:23,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950948852] [2021-10-28 09:24:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:24:23,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:24:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:24:24,047 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:24:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:24:24,116 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:24:24,116 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:24:24,117 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr33REQUIRES_VIOLATION [2021-10-28 09:24:24,119 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 09:24:24,119 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 09:24:24,119 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 09:24:24,119 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 09:24:24,119 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 09:24:24,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 09:24:24,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-28 09:24:24,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 09:24:24,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 09:24:24,120 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-28 09:24:24,121 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-28 09:24:24,121 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-28 09:24:24,121 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-28 09:24:24,121 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-28 09:24:24,121 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-28 09:24:24,121 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-28 09:24:24,122 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-28 09:24:24,122 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-28 09:24:24,122 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-28 09:24:24,122 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-28 09:24:24,122 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-28 09:24:24,123 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-28 09:24:24,123 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-28 09:24:24,123 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-28 09:24:24,123 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-28 09:24:24,123 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-28 09:24:24,123 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-28 09:24:24,124 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-28 09:24:24,124 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-28 09:24:24,124 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-28 09:24:24,124 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:24:24,124 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:24:24,125 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:24:24,125 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-28 09:24:24,125 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-10-28 09:24:24,125 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION [2021-10-28 09:24:24,125 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:24:24,125 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:24:24,126 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:24:24,126 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:24:24,126 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:24:24,126 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 09:24:24,126 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 09:24:24,127 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 09:24:24,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-10-28 09:24:24,130 INFO L731 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:24:24,134 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:24:24,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:24:24 BoogieIcfgContainer [2021-10-28 09:24:24,173 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:24:24,173 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:24:24,174 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:24:24,174 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:24:24,174 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:22:19" (3/4) ... [2021-10-28 09:24:24,176 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 09:24:24,229 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:24:24,232 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:24:24,233 INFO L168 Benchmark]: Toolchain (without parser) took 126016.91 ms. Allocated memory was 132.1 MB in the beginning and 559.9 MB in the end (delta: 427.8 MB). Free memory was 93.8 MB in the beginning and 262.6 MB in the end (delta: -168.8 MB). Peak memory consumption was 258.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:24,234 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 132.1 MB. Free memory was 108.1 MB in the beginning and 108.0 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:24:24,236 INFO L168 Benchmark]: CACSL2BoogieTranslator took 536.57 ms. Allocated memory is still 132.1 MB. Free memory was 93.8 MB in the beginning and 99.0 MB in the end (delta: -5.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:24,237 INFO L168 Benchmark]: Boogie Preprocessor took 58.37 ms. Allocated memory is still 132.1 MB. Free memory was 99.0 MB in the beginning and 96.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:24,237 INFO L168 Benchmark]: RCFGBuilder took 758.26 ms. Allocated memory is still 132.1 MB. Free memory was 96.5 MB in the beginning and 71.8 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:24,241 INFO L168 Benchmark]: TraceAbstraction took 124595.71 ms. Allocated memory was 132.1 MB in the beginning and 559.9 MB in the end (delta: 427.8 MB). Free memory was 71.3 MB in the beginning and 266.8 MB in the end (delta: -195.5 MB). Peak memory consumption was 235.5 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:24,242 INFO L168 Benchmark]: Witness Printer took 59.25 ms. Allocated memory is still 559.9 MB. Free memory was 265.7 MB in the beginning and 262.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:24:24,243 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 132.1 MB. Free memory was 108.1 MB in the beginning and 108.0 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 536.57 ms. Allocated memory is still 132.1 MB. Free memory was 93.8 MB in the beginning and 99.0 MB in the end (delta: -5.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.37 ms. Allocated memory is still 132.1 MB. Free memory was 99.0 MB in the beginning and 96.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 758.26 ms. Allocated memory is still 132.1 MB. Free memory was 96.5 MB in the beginning and 71.8 MB in the end (delta: 24.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 124595.71 ms. Allocated memory was 132.1 MB in the beginning and 559.9 MB in the end (delta: 427.8 MB). Free memory was 71.3 MB in the beginning and 266.8 MB in the end (delta: -195.5 MB). Peak memory consumption was 235.5 MB. Max. memory is 16.1 GB. * Witness Printer took 59.25 ms. Allocated memory is still 559.9 MB. Free memory was 265.7 MB in the beginning and 262.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 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: 610]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L567] List p, a, t; [L568] a = (List) malloc(sizeof(struct node)) [L569] COND FALSE !(a == 0) VAL [a={1:0}] [L570] a->n = 0 VAL [a={1:0}] [L571] p = a [L572] int i = 0; VAL [a={1:0}, i=0, p={1:0}] [L573] i < 20 && __VERIFIER_nondet_int() [L573] i < 20 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={1:0}, i=0, i < 20 && __VERIFIER_nondet_int()=1, p={1:0}] [L573] COND TRUE i < 20 && __VERIFIER_nondet_int() [L574] i++ [L575] p->flag = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=-1, a={1:0}, i=1, p={1:0}] [L576] p->flag VAL [a={1:0}, i=1, p={1:0}, p->flag=-1] [L576] COND TRUE p->flag [L577] p->h = 1 VAL [a={1:0}, i=1, p={1:0}] [L581] t = (List) malloc(sizeof(struct node)) [L582] COND FALSE !(t == 0) VAL [a={1:0}, i=1, p={1:0}, t={-2:0}] [L583] p->n = t VAL [a={1:0}, i=1, p={1:0}, t={-2:0}] [L584] EXPR p->n VAL [a={1:0}, i=1, p={1:0}, p->n={-2:0}, t={-2:0}] [L584] p = p->n [L573] i < 20 && __VERIFIER_nondet_int() [L573] i < 20 && __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, a={1:0}, i=1, i < 20 && __VERIFIER_nondet_int()=0, p={-2:0}, t={-2:0}] [L573] COND FALSE !(i < 20 && __VERIFIER_nondet_int()) [L586] p->h = 3 VAL [a={1:0}, i=1, p={-2:0}, t={-2:0}] [L587] p = a VAL [a={1:0}, i=1, p={1:0}, t={-2:0}] [L588] EXPR p->h VAL [a={1:0}, i=1, p={1:0}, p->h=1, t={-2:0}] [L588] COND TRUE p->h != 3 [L589] p->flag VAL [a={1:0}, i=1, p={1:0}, p->flag=-1, t={-2:0}] [L589] COND TRUE p->flag [L590] EXPR p->h VAL [a={1:0}, i=1, p={1:0}, p->h=1, t={-2:0}] [L590] COND FALSE !(p->h != 1) [L596] EXPR p->n VAL [a={1:0}, i=1, p={1:0}, p->n={-2:0}, t={-2:0}] [L596] p = p->n [L597] i++ VAL [a={1:0}, i=2, p={-2:0}, t={-2:0}] [L588] EXPR p->h VAL [a={1:0}, i=2, p={-2:0}, p->h=3, t={-2:0}] [L588] COND FALSE !(p->h != 3) [L599] EXPR p->h VAL [a={1:0}, i=2, p={-2:0}, p->h=3, t={-2:0}] [L599] COND FALSE !(p->h != 3 || i > 20) [L601] p = a VAL [a={1:0}, i=2, p={1:0}, t={-2:0}] [L602] COND FALSE !(p == 0) VAL [a={1:0}, i=2, p={1:0}, t={-2:0}] [L605] EXPR p->n VAL [a={1:0}, i=2, p={1:0}, p->n={-2:0}, t={-2:0}] [L605] COND FALSE !(p->n == 0) [L610] EXPR p->n VAL [a={1:0}, i=2, p={1:0}, p->n={-2:0}, t={-2:0}] [L610] COND TRUE p->n != 0 [L611] EXPR p->n VAL [a={1:0}, i=2, p={1:0}, p->n={-2:0}, t={-2:0}] [L611] t = p->n [L612] free(p) VAL [a={1:0}, i=2, p={1:0}, t={-2:0}] [L612] free(p) VAL [a={1:0}, i=2, p={1:0}, t={-2:0}] [L612] free(p) [L613] p = t VAL [a={1:0}, i=2, p={-2:0}, t={-2:0}] [L610] EXPR p->n VAL [a={1:0}, i=2, p={-2:0}, p->n={58:60}, t={-2:0}] [L610] COND TRUE p->n != 0 [L611] EXPR p->n VAL [a={1:0}, i=2, p={-2:0}, p->n={58:60}, t={-2:0}] [L611] t = p->n [L612] free(p) VAL [a={1:0}, i=2, p={-2:0}, t={58:60}] [L612] free(p) VAL [a={1:0}, i=2, p={-2:0}, t={58:60}] [L612] free(p) [L613] p = t VAL [a={1:0}, i=2, p={58:60}, t={58:60}] [L610] p->n - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 570]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 575]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 575]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 579]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 583]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 583]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 584]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 584]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 590]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 593]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 593]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 599]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 599]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 611]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 611]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 615]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 615]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 615]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 618]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 566]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 119 locations, 45 error locations. Started 1 CEGAR loops. OverallTime: 124.5s, OverallIterations: 39, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 64.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 2731 SDtfs, 14574 SDslu, 22807 SDs, 0 SdLazy, 37664 SolverSat, 2703 SolverUnsat, 16 SolverUnknown, 0 SolverNotchecked, 43.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2140 GetRequests, 885 SyntacticMatches, 33 SemanticMatches, 1222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16546 ImplicationChecksByTransitivity, 27.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=366occurred in iteration=37, InterpolantAutomatonStates: 775, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 38 MinimizatonAttempts, 3369 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 35.6s InterpolantComputationTime, 2598 NumberOfCodeBlocks, 2598 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2478 ConstructedInterpolants, 321 QuantifiedInterpolants, 43696 SizeOfPredicates, 336 NumberOfNonLiveVariables, 6024 ConjunctsInSsa, 897 ConjunctsInUnsatCore, 63 InterpolantComputations, 13 PerfectInterpolantSequences, 34/591 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 09:24:24,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18d8740d-e371-4c2d-8893-cb785681de72/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...