./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/20051113-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/20051113-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y --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 2a43a02844acf962bfa6f77d0e1512c06ac1cc2fb3c3905e584a292a069b5426 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:55:39,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:55:39,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:55:39,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:55:39,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:55:39,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:55:39,687 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:55:39,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:55:39,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:55:39,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:55:39,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:55:39,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:55:39,698 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:55:39,699 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:55:39,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:55:39,703 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:55:39,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:55:39,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:55:39,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:55:39,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:55:39,714 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:55:39,716 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:55:39,718 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:55:39,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:55:39,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:55:39,724 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:55:39,724 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:55:39,725 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:55:39,726 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:55:39,728 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:55:39,728 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:55:39,729 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:55:39,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:55:39,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:55:39,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:55:39,734 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:55:39,735 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:55:39,735 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:55:39,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:55:39,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:55:39,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:55:39,739 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-13 18:55:39,765 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:55:39,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:55:39,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:55:39,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:55:39,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:55:39,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:55:39,768 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:55:39,769 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:55:39,769 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:55:39,769 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:55:39,769 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:55:39,770 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 18:55:39,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:55:39,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:55:39,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:55:39,771 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 18:55:39,771 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 18:55:39,771 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 18:55:39,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:55:39,772 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 18:55:39,772 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:55:39,772 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:55:39,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:55:39,773 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:55:39,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:55:39,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:55:39,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:55:39,774 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:55:39,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:55:39,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:55:39,774 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:55:39,775 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_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a43a02844acf962bfa6f77d0e1512c06ac1cc2fb3c3905e584a292a069b5426 [2021-11-13 18:55:40,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:55:40,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:55:40,037 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:55:40,039 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:55:40,039 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:55:40,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/memsafety/20051113-1.i [2021-11-13 18:55:40,126 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/data/48156b30b/a7832dc2981f4ee5a5c38027a2c0eabf/FLAG21fa67e64 [2021-11-13 18:55:40,724 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:55:40,725 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/sv-benchmarks/c/memsafety/20051113-1.i [2021-11-13 18:55:40,739 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/data/48156b30b/a7832dc2981f4ee5a5c38027a2c0eabf/FLAG21fa67e64 [2021-11-13 18:55:41,007 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/data/48156b30b/a7832dc2981f4ee5a5c38027a2c0eabf [2021-11-13 18:55:41,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:55:41,020 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 18:55:41,022 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:55:41,022 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:55:41,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:55:41,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:55:41" (1/1) ... [2021-11-13 18:55:41,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@792f4c16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:55:41, skipping insertion in model container [2021-11-13 18:55:41,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:55:41" (1/1) ... [2021-11-13 18:55:41,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:55:41,081 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:55:41,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:55:41,489 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:55:41,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:55:41,594 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:55:41,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:55:41 WrapperNode [2021-11-13 18:55:41,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:55:41,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:55:41,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:55:41,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:55:41,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:55:41" (1/1) ... [2021-11-13 18:55:41,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:55:41" (1/1) ... [2021-11-13 18:55:41,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:55:41" (1/1) ... [2021-11-13 18:55:41,620 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:55:41" (1/1) ... [2021-11-13 18:55:41,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:55:41" (1/1) ... [2021-11-13 18:55:41,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:55:41" (1/1) ... [2021-11-13 18:55:41,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:55:41" (1/1) ... [2021-11-13 18:55:41,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:55:41,653 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:55:41,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:55:41,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:55:41,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:55:41" (1/1) ... [2021-11-13 18:55:41,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:55:41,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:41,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:55:41,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:55:41,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-13 18:55:41,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:55:41,737 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-13 18:55:41,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-13 18:55:41,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-13 18:55:41,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-13 18:55:41,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-13 18:55:41,737 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-13 18:55:41,738 INFO L138 BoogieDeclarations]: Found implementation of procedure Sum [2021-11-13 18:55:41,738 INFO L138 BoogieDeclarations]: Found implementation of procedure Sum2 [2021-11-13 18:55:41,738 INFO L138 BoogieDeclarations]: Found implementation of procedure dummy_abort [2021-11-13 18:55:41,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-13 18:55:41,738 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 18:55:41,738 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-13 18:55:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-13 18:55:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-13 18:55:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-13 18:55:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-13 18:55:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:55:41,739 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-13 18:55:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-13 18:55:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-13 18:55:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-13 18:55:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-13 18:55:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-13 18:55:41,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-13 18:55:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-13 18:55:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-13 18:55:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-13 18:55:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-13 18:55:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-13 18:55:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-13 18:55:41,741 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-13 18:55:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-13 18:55:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-13 18:55:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-13 18:55:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-13 18:55:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-13 18:55:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-13 18:55:41,742 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-13 18:55:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-13 18:55:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-13 18:55:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-13 18:55:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-13 18:55:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-13 18:55:41,743 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-13 18:55:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-13 18:55:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-13 18:55:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-13 18:55:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-13 18:55:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-13 18:55:41,744 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-13 18:55:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-13 18:55:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-13 18:55:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-13 18:55:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-13 18:55:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-13 18:55:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-13 18:55:41,745 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-13 18:55:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-13 18:55:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-13 18:55:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-13 18:55:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-13 18:55:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-13 18:55:41,746 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-13 18:55:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-13 18:55:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-13 18:55:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-13 18:55:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-13 18:55:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-13 18:55:41,747 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-13 18:55:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-13 18:55:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-13 18:55:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-13 18:55:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-13 18:55:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-13 18:55:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-13 18:55:41,748 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-13 18:55:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-13 18:55:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-13 18:55:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-13 18:55:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-13 18:55:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-13 18:55:41,749 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-13 18:55:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-13 18:55:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-13 18:55:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-13 18:55:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-13 18:55:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-13 18:55:41,750 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-13 18:55:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-13 18:55:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-13 18:55:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-13 18:55:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-13 18:55:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-13 18:55:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-13 18:55:41,751 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-13 18:55:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-13 18:55:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-13 18:55:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-13 18:55:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-13 18:55:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-13 18:55:41,752 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-13 18:55:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-13 18:55:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-13 18:55:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-13 18:55:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-13 18:55:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-13 18:55:41,753 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-13 18:55:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-13 18:55:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-13 18:55:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-13 18:55:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-13 18:55:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-13 18:55:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-13 18:55:41,754 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-13 18:55:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-13 18:55:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-13 18:55:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-13 18:55:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-13 18:55:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-13 18:55:41,755 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-13 18:55:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-13 18:55:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-13 18:55:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-13 18:55:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-13 18:55:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure Sum [2021-11-13 18:55:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:55:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure Sum2 [2021-11-13 18:55:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure dummy_abort [2021-11-13 18:55:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-13 18:55:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:55:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 18:55:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:55:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-13 18:55:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:55:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:55:41,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:55:42,245 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-13 18:55:42,386 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:55:42,391 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 18:55:42,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:55:42 BoogieIcfgContainer [2021-11-13 18:55:42,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:55:42,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:55:42,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:55:42,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:55:42,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:55:41" (1/3) ... [2021-11-13 18:55:42,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322db451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:55:42, skipping insertion in model container [2021-11-13 18:55:42,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:55:41" (2/3) ... [2021-11-13 18:55:42,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@322db451 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:55:42, skipping insertion in model container [2021-11-13 18:55:42,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:55:42" (3/3) ... [2021-11-13 18:55:42,410 INFO L111 eAbstractionObserver]: Analyzing ICFG 20051113-1.i [2021-11-13 18:55:42,416 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:55:42,416 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2021-11-13 18:55:42,473 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:55:42,481 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 18:55:42,482 INFO L340 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2021-11-13 18:55:42,500 INFO L276 IsEmpty]: Start isEmpty. Operand has 77 states, 39 states have (on average 1.794871794871795) internal successors, (70), 65 states have internal predecessors, (70), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 18:55:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 18:55:42,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:42,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:42,512 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:42,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1871088023, now seen corresponding path program 1 times [2021-11-13 18:55:42,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:42,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817727250] [2021-11-13 18:55:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:42,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:42,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:42,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:42,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:42,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817727250] [2021-11-13 18:55:42,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817727250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:55:42,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:55:42,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:55:42,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036061248] [2021-11-13 18:55:42,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:42,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:55:42,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:42,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:55:42,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:55:42,850 INFO L87 Difference]: Start difference. First operand has 77 states, 39 states have (on average 1.794871794871795) internal successors, (70), 65 states have internal predecessors, (70), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-13 18:55:43,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:43,080 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2021-11-13 18:55:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:55:43,083 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-11-13 18:55:43,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:43,092 INFO L225 Difference]: With dead ends: 69 [2021-11-13 18:55:43,092 INFO L226 Difference]: Without dead ends: 66 [2021-11-13 18:55:43,094 INFO L932 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 [2021-11-13 18:55:43,098 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 53 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.15ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.66ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:43,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 49 Invalid, 120 Unknown, 0 Unchecked, 7.15ms Time], IncrementalHoareTripleChecker [13 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 182.66ms Time] [2021-11-13 18:55:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-13 18:55:43,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-11-13 18:55:43,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 55 states have internal predecessors, (58), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:55:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2021-11-13 18:55:43,144 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 7 [2021-11-13 18:55:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:43,145 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2021-11-13 18:55:43,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-13 18:55:43,145 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2021-11-13 18:55:43,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-13 18:55:43,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:43,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:43,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:55:43,147 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:43,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:43,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1871088022, now seen corresponding path program 1 times [2021-11-13 18:55:43,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:43,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020618644] [2021-11-13 18:55:43,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:43,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:43,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:43,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:43,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:43,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020618644] [2021-11-13 18:55:43,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020618644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:55:43,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:55:43,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:55:43,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711076215] [2021-11-13 18:55:43,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:43,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:55:43,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:43,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:55:43,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:55:43,246 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-13 18:55:43,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:43,427 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-11-13 18:55:43,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:55:43,428 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-11-13 18:55:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:43,433 INFO L225 Difference]: With dead ends: 58 [2021-11-13 18:55:43,433 INFO L226 Difference]: Without dead ends: 58 [2021-11-13 18:55:43,433 INFO L932 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 [2021-11-13 18:55:43,440 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 45 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 126.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.65ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 150.06ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:43,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 43 Invalid, 101 Unknown, 0 Unchecked, 7.65ms Time], IncrementalHoareTripleChecker [13 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 150.06ms Time] [2021-11-13 18:55:43,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-13 18:55:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-13 18:55:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 47 states have internal predecessors, (50), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:55:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2021-11-13 18:55:43,463 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 7 [2021-11-13 18:55:43,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:43,464 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2021-11-13 18:55:43,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-11-13 18:55:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2021-11-13 18:55:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 18:55:43,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:43,467 INFO L514 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] [2021-11-13 18:55:43,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:55:43,468 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting SumErr0REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:43,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:43,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1083580870, now seen corresponding path program 1 times [2021-11-13 18:55:43,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:43,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264638280] [2021-11-13 18:55:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:43,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:43,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:43,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:43,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:43,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264638280] [2021-11-13 18:55:43,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264638280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:55:43,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:55:43,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:55:43,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549929932] [2021-11-13 18:55:43,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:43,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:55:43,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:43,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:55:43,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:55:43,664 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:55:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:44,004 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2021-11-13 18:55:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:55:44,005 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2021-11-13 18:55:44,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:44,006 INFO L225 Difference]: With dead ends: 61 [2021-11-13 18:55:44,007 INFO L226 Difference]: Without dead ends: 61 [2021-11-13 18:55:44,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:55:44,008 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 90 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 165.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.58ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 199.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:44,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 75 Invalid, 250 Unknown, 0 Unchecked, 4.58ms Time], IncrementalHoareTripleChecker [20 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 199.43ms Time] [2021-11-13 18:55:44,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-13 18:55:44,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2021-11-13 18:55:44,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 45 states have internal predecessors, (48), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:55:44,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-11-13 18:55:44,017 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 23 [2021-11-13 18:55:44,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:44,018 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-11-13 18:55:44,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:55:44,018 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-11-13 18:55:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 18:55:44,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:44,019 INFO L514 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] [2021-11-13 18:55:44,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:55:44,020 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting SumErr1REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:44,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1083580869, now seen corresponding path program 1 times [2021-11-13 18:55:44,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:44,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644640667] [2021-11-13 18:55:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:44,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:44,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:44,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:44,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:44,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644640667] [2021-11-13 18:55:44,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644640667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:55:44,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:55:44,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:55:44,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429974273] [2021-11-13 18:55:44,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:44,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:55:44,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:44,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:55:44,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:55:44,155 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:55:44,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:44,425 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-11-13 18:55:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:55:44,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-11-13 18:55:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:44,430 INFO L225 Difference]: With dead ends: 60 [2021-11-13 18:55:44,430 INFO L226 Difference]: Without dead ends: 60 [2021-11-13 18:55:44,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:55:44,442 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 85 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 139.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.63ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 164.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:44,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 69 Invalid, 195 Unknown, 0 Unchecked, 3.63ms Time], IncrementalHoareTripleChecker [16 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 164.53ms Time] [2021-11-13 18:55:44,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-13 18:55:44,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-11-13 18:55:44,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 44 states have internal predecessors, (47), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:55:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2021-11-13 18:55:44,450 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 23 [2021-11-13 18:55:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:44,450 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2021-11-13 18:55:44,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:55:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2021-11-13 18:55:44,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-13 18:55:44,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:44,452 INFO L514 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] [2021-11-13 18:55:44,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:55:44,452 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting SumErr3REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:44,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1939130692, now seen corresponding path program 1 times [2021-11-13 18:55:44,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:44,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935922349] [2021-11-13 18:55:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:44,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:44,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:44,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:44,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:44,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935922349] [2021-11-13 18:55:44,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935922349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:55:44,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:55:44,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:55:44,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792232245] [2021-11-13 18:55:44,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:44,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:55:44,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:44,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:55:44,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:55:44,640 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:55:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:44,909 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-11-13 18:55:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:55:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-13 18:55:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:44,911 INFO L225 Difference]: With dead ends: 68 [2021-11-13 18:55:44,911 INFO L226 Difference]: Without dead ends: 68 [2021-11-13 18:55:44,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:55:44,912 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 102 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 146.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.62ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 175.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:44,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 66 Invalid, 210 Unknown, 0 Unchecked, 3.62ms Time], IncrementalHoareTripleChecker [19 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 175.99ms Time] [2021-11-13 18:55:44,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-13 18:55:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 58. [2021-11-13 18:55:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 40 states have (on average 1.275) internal successors, (51), 47 states have internal predecessors, (51), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:55:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2021-11-13 18:55:44,919 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 25 [2021-11-13 18:55:44,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:44,920 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2021-11-13 18:55:44,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 18:55:44,920 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2021-11-13 18:55:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 18:55:44,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:44,921 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:44,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:55:44,922 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting Sum2Err0REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:44,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:44,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1681534269, now seen corresponding path program 1 times [2021-11-13 18:55:44,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:44,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625565354] [2021-11-13 18:55:44,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:44,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:44,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:44,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:44,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:45,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:55:45,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:45,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:45,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:45,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625565354] [2021-11-13 18:55:45,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625565354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:55:45,030 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:55:45,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:55:45,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448871924] [2021-11-13 18:55:45,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:45,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:55:45,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:45,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:55:45,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:55:45,032 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:55:45,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:45,323 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-11-13 18:55:45,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:55:45,324 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-11-13 18:55:45,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:45,325 INFO L225 Difference]: With dead ends: 61 [2021-11-13 18:55:45,325 INFO L226 Difference]: Without dead ends: 61 [2021-11-13 18:55:45,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:55:45,326 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 106 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 135.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.96ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 167.42ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:45,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 90 Invalid, 265 Unknown, 0 Unchecked, 2.96ms Time], IncrementalHoareTripleChecker [22 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 167.42ms Time] [2021-11-13 18:55:45,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-13 18:55:45,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2021-11-13 18:55:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.225) internal successors, (49), 45 states have internal predecessors, (49), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:55:45,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2021-11-13 18:55:45,332 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 31 [2021-11-13 18:55:45,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:45,332 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2021-11-13 18:55:45,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:55:45,332 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2021-11-13 18:55:45,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 18:55:45,333 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:45,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:45,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:55:45,334 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting Sum2Err1REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:45,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:45,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1681534268, now seen corresponding path program 1 times [2021-11-13 18:55:45,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:45,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126410596] [2021-11-13 18:55:45,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:45,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:45,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:45,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:45,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:55:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:45,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:45,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126410596] [2021-11-13 18:55:45,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126410596] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:55:45,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:55:45,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:55:45,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180994949] [2021-11-13 18:55:45,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:45,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:55:45,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:45,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:55:45,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:55:45,430 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:55:45,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:45,670 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2021-11-13 18:55:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:55:45,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-11-13 18:55:45,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:45,672 INFO L225 Difference]: With dead ends: 66 [2021-11-13 18:55:45,672 INFO L226 Difference]: Without dead ends: 66 [2021-11-13 18:55:45,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:55:45,673 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 73 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 122.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.03ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 154.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:45,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 124 Invalid, 173 Unknown, 0 Unchecked, 3.03ms Time], IncrementalHoareTripleChecker [18 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 154.58ms Time] [2021-11-13 18:55:45,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-13 18:55:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2021-11-13 18:55:45,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 48 states have internal predecessors, (52), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-13 18:55:45,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-11-13 18:55:45,679 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 31 [2021-11-13 18:55:45,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:45,680 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-11-13 18:55:45,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:55:45,680 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-11-13 18:55:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-13 18:55:45,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:45,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:45,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:55:45,681 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting SumErr3REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash -486062570, now seen corresponding path program 1 times [2021-11-13 18:55:45,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:45,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261714688] [2021-11-13 18:55:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:45,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:45,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:45,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:45,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:45,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:45,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261714688] [2021-11-13 18:55:45,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261714688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:45,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723740200] [2021-11-13 18:55:45,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:45,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:45,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:45,847 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:45,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:55:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:55:46,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:46,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:55:46,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:55:46,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 18:55:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:46,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723740200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:55:46,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:55:46,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2021-11-13 18:55:46,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870710329] [2021-11-13 18:55:46,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:55:46,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 18:55:46,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:46,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 18:55:46,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:55:46,891 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 22 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-13 18:55:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:47,497 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-11-13 18:55:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:55:47,497 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2021-11-13 18:55:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:47,498 INFO L225 Difference]: With dead ends: 81 [2021-11-13 18:55:47,498 INFO L226 Difference]: Without dead ends: 81 [2021-11-13 18:55:47,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:55:47,500 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 211 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 293.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.28ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 356.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:47,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 127 Invalid, 532 Unknown, 0 Unchecked, 5.28ms Time], IncrementalHoareTripleChecker [62 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 356.10ms Time] [2021-11-13 18:55:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-13 18:55:47,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2021-11-13 18:55:47,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 58 states have internal predecessors, (64), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-13 18:55:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-11-13 18:55:47,506 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 30 [2021-11-13 18:55:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:47,506 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-11-13 18:55:47,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-13 18:55:47,507 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-11-13 18:55:47,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 18:55:47,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:47,508 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:47,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:55:47,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:47,727 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting Sum2Err1REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:47,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:47,728 INFO L85 PathProgramCache]: Analyzing trace with hash -772582610, now seen corresponding path program 1 times [2021-11-13 18:55:47,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:47,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309930850] [2021-11-13 18:55:47,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:47,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:47,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:47,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:47,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:55:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:47,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-13 18:55:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:47,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:47,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309930850] [2021-11-13 18:55:47,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309930850] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:55:47,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:55:47,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:55:47,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599618439] [2021-11-13 18:55:47,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:47,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:55:47,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:55:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:55:47,834 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:55:48,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:48,063 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-11-13 18:55:48,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:55:48,064 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2021-11-13 18:55:48,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:48,065 INFO L225 Difference]: With dead ends: 74 [2021-11-13 18:55:48,065 INFO L226 Difference]: Without dead ends: 74 [2021-11-13 18:55:48,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:55:48,066 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 126.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.21ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 149.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:48,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 69 Invalid, 183 Unknown, 0 Unchecked, 2.21ms Time], IncrementalHoareTripleChecker [16 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 149.28ms Time] [2021-11-13 18:55:48,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-13 18:55:48,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2021-11-13 18:55:48,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 57 states have internal predecessors, (63), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-13 18:55:48,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-11-13 18:55:48,072 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 34 [2021-11-13 18:55:48,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:48,079 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-11-13 18:55:48,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:55:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-11-13 18:55:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:55:48,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:48,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:48,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:55:48,084 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting Sum2Err3REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:48,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:48,085 INFO L85 PathProgramCache]: Analyzing trace with hash 577453519, now seen corresponding path program 1 times [2021-11-13 18:55:48,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:48,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319543327] [2021-11-13 18:55:48,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:48,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:48,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:48,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:48,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:48,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:55:48,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:48,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-13 18:55:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:48,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:48,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:48,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319543327] [2021-11-13 18:55:48,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319543327] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:55:48,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:55:48,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:55:48,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610483198] [2021-11-13 18:55:48,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:48,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:55:48,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:48,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:55:48,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:55:48,217 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:55:48,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:48,461 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2021-11-13 18:55:48,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:55:48,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2021-11-13 18:55:48,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:48,463 INFO L225 Difference]: With dead ends: 82 [2021-11-13 18:55:48,463 INFO L226 Difference]: Without dead ends: 82 [2021-11-13 18:55:48,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:55:48,464 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 95 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 130.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.20ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 155.06ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:48,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 66 Invalid, 198 Unknown, 0 Unchecked, 2.20ms Time], IncrementalHoareTripleChecker [19 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 155.06ms Time] [2021-11-13 18:55:48,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-13 18:55:48,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-11-13 18:55:48,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 60 states have internal predecessors, (67), 7 states have call successors, (7), 6 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-13 18:55:48,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2021-11-13 18:55:48,469 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 36 [2021-11-13 18:55:48,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:48,469 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2021-11-13 18:55:48,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:55:48,470 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2021-11-13 18:55:48,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:55:48,471 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:48,471 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:48,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:55:48,471 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting Sum2Err3REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:48,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:48,472 INFO L85 PathProgramCache]: Analyzing trace with hash 548314426, now seen corresponding path program 1 times [2021-11-13 18:55:48,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:48,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12370938] [2021-11-13 18:55:48,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:48,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:48,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:48,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:48,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:48,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:55:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:48,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-13 18:55:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:48,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:48,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12370938] [2021-11-13 18:55:48,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12370938] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:48,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571322098] [2021-11-13 18:55:48,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:48,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:48,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:48,646 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:48,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:55:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:48,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-13 18:55:48,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:49,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:55:49,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:55:49,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 18:55:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:49,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571322098] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:55:49,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:55:49,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 22 [2021-11-13 18:55:49,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063249992] [2021-11-13 18:55:49,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:55:49,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 18:55:49,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:49,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 18:55:49,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:55:49,642 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 23 states, 20 states have (on average 4.2) internal successors, (84), 18 states have internal predecessors, (84), 6 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-13 18:55:50,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:50,234 INFO L93 Difference]: Finished difference Result 98 states and 109 transitions. [2021-11-13 18:55:50,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:55:50,234 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 4.2) internal successors, (84), 18 states have internal predecessors, (84), 6 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) Word has length 41 [2021-11-13 18:55:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:50,236 INFO L225 Difference]: With dead ends: 98 [2021-11-13 18:55:50,236 INFO L226 Difference]: Without dead ends: 98 [2021-11-13 18:55:50,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:55:50,237 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 210 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 249.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.27ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 292.62ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:50,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 178 Invalid, 466 Unknown, 0 Unchecked, 4.27ms Time], IncrementalHoareTripleChecker [50 Valid, 375 Invalid, 0 Unknown, 41 Unchecked, 292.62ms Time] [2021-11-13 18:55:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-13 18:55:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 84. [2021-11-13 18:55:50,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 71 states have internal predecessors, (80), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-13 18:55:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-11-13 18:55:50,243 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 41 [2021-11-13 18:55:50,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:50,243 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-11-13 18:55:50,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 4.2) internal successors, (84), 18 states have internal predecessors, (84), 6 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (10), 4 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-13 18:55:50,244 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-11-13 18:55:50,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 18:55:50,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:50,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:50,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:55:50,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:50,459 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:50,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:50,460 INFO L85 PathProgramCache]: Analyzing trace with hash 301201259, now seen corresponding path program 1 times [2021-11-13 18:55:50,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:50,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979760660] [2021-11-13 18:55:50,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:50,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:50,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:50,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:50,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:55:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:50,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-13 18:55:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:50,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-13 18:55:50,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:50,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:50,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:50,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979760660] [2021-11-13 18:55:50,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979760660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:55:50,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:55:50,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:55:50,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459352348] [2021-11-13 18:55:50,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:50,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:55:50,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:50,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:55:50,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:55:50,558 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:55:50,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:50,761 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2021-11-13 18:55:50,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:55:50,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2021-11-13 18:55:50,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:50,763 INFO L225 Difference]: With dead ends: 94 [2021-11-13 18:55:50,763 INFO L226 Difference]: Without dead ends: 94 [2021-11-13 18:55:50,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:55:50,764 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 71 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.57ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 132.15ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:50,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 119 Invalid, 174 Unknown, 0 Unchecked, 2.57ms Time], IncrementalHoareTripleChecker [18 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 132.15ms Time] [2021-11-13 18:55:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-13 18:55:50,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2021-11-13 18:55:50,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 75 states have internal predecessors, (84), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-13 18:55:50,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2021-11-13 18:55:50,769 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 42 [2021-11-13 18:55:50,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:50,769 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2021-11-13 18:55:50,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:55:50,770 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2021-11-13 18:55:50,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 18:55:50,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:50,771 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:50,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:55:50,771 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting SumErr3REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:50,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:50,772 INFO L85 PathProgramCache]: Analyzing trace with hash 44885462, now seen corresponding path program 2 times [2021-11-13 18:55:50,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:50,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874559215] [2021-11-13 18:55:50,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:50,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:50,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:50,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:50,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:55:50,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:50,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874559215] [2021-11-13 18:55:50,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874559215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:50,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500378717] [2021-11-13 18:55:50,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:55:50,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:50,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:50,971 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:50,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:55:51,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 18:55:51,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:55:51,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:55:51,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:55:51,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:55:51,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500378717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:55:51,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:55:51,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2021-11-13 18:55:51,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250113592] [2021-11-13 18:55:51,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:51,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:55:51,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:51,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:55:51,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:55:51,214 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:55:51,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:51,235 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2021-11-13 18:55:51,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:55:51,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-11-13 18:55:51,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:51,237 INFO L225 Difference]: With dead ends: 92 [2021-11-13 18:55:51,237 INFO L226 Difference]: Without dead ends: 90 [2021-11-13 18:55:51,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:55:51,238 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.56ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:51,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 162 Invalid, 8 Unknown, 0 Unchecked, 0.56ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 8.45ms Time] [2021-11-13 18:55:51,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-13 18:55:51,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-13 18:55:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 76 states have internal predecessors, (85), 7 states have call successors, (7), 7 states have call predecessors, (7), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-13 18:55:51,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2021-11-13 18:55:51,242 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 40 [2021-11-13 18:55:51,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:51,243 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2021-11-13 18:55:51,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-13 18:55:51,243 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2021-11-13 18:55:51,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:55:51,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:51,244 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:51,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-13 18:55:51,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:51,463 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting SumErr3REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:51,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:51,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2011158320, now seen corresponding path program 1 times [2021-11-13 18:55:51,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:51,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045708981] [2021-11-13 18:55:51,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:51,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:51,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:51,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:51,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:51,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:51,650 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:55:51,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:51,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045708981] [2021-11-13 18:55:51,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045708981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:51,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051145366] [2021-11-13 18:55:51,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:51,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:51,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:51,651 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:51,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:55:51,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:51,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:55:51,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:51,850 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 [2021-11-13 18:55:51,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:51,892 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 [2021-11-13 18:55:51,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:51,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:51,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:51,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:55:51,945 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 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-13 18:55:51,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:51,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:51,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:51,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:51,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:51,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:55:52,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-11-13 18:55:52,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:55:52,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2021-11-13 18:55:52,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:55:52,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2021-11-13 18:55:52,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:52,265 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:55:52,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2021-11-13 18:55:53,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:55:53,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 57 treesize of output 25 [2021-11-13 18:55:53,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:55:53,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:55:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:55:53,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051145366] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:55:53,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:55:53,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 9] total 30 [2021-11-13 18:55:53,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126678860] [2021-11-13 18:55:53,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:55:53,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-13 18:55:53,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:53,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-13 18:55:53,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-11-13 18:55:53,543 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 30 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 25 states have internal predecessors, (77), 5 states have call successors, (9), 6 states have call predecessors, (9), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 18:55:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:54,833 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2021-11-13 18:55:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 18:55:54,834 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 25 states have internal predecessors, (77), 5 states have call successors, (9), 6 states have call predecessors, (9), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-11-13 18:55:54,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:54,835 INFO L225 Difference]: With dead ends: 90 [2021-11-13 18:55:54,835 INFO L226 Difference]: Without dead ends: 90 [2021-11-13 18:55:54,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 63 SyntacticMatches, 12 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 18:55:54,839 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 106 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 501.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.56ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 600.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:54,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 154 Invalid, 771 Unknown, 0 Unchecked, 6.56ms Time], IncrementalHoareTripleChecker [53 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 600.08ms Time] [2021-11-13 18:55:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-13 18:55:54,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2021-11-13 18:55:54,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 71 states have internal predecessors, (78), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-13 18:55:54,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-11-13 18:55:54,848 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 41 [2021-11-13 18:55:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:54,850 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-11-13 18:55:54,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 25 states have internal predecessors, (77), 5 states have call successors, (9), 6 states have call predecessors, (9), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-13 18:55:54,850 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-11-13 18:55:54,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 18:55:54,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:54,852 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:54,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:55:55,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:55,067 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:55,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:55,068 INFO L85 PathProgramCache]: Analyzing trace with hash 518229589, now seen corresponding path program 1 times [2021-11-13 18:55:55,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:55,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922298037] [2021-11-13 18:55:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:55,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:55,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:55,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:55,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:55:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:55,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-13 18:55:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:55,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-11-13 18:55:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:55:55,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:55,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922298037] [2021-11-13 18:55:55,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922298037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:55,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475842867] [2021-11-13 18:55:55,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:55,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:55,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:55,242 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:55,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:55:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:55,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 18:55:55,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:55,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:55:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:55:55,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:55:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:55:56,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475842867] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:56,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:55:56,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12, 13] total 27 [2021-11-13 18:55:56,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119866930] [2021-11-13 18:55:56,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:55:56,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:55:56,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:56,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:55:56,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-11-13 18:55:56,195 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 18:55:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:56,336 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2021-11-13 18:55:56,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:55:56,337 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2021-11-13 18:55:56,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:56,337 INFO L225 Difference]: With dead ends: 82 [2021-11-13 18:55:56,337 INFO L226 Difference]: Without dead ends: 79 [2021-11-13 18:55:56,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:55:56,339 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 28 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 87.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.68ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:56,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 204 Invalid, 164 Unknown, 0 Unchecked, 1.68ms Time], IncrementalHoareTripleChecker [13 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 108.77ms Time] [2021-11-13 18:55:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-13 18:55:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-13 18:55:56,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:55:56,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 86 transitions. [2021-11-13 18:55:56,343 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 86 transitions. Word has length 48 [2021-11-13 18:55:56,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:56,343 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 86 transitions. [2021-11-13 18:55:56,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 18:55:56,343 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 86 transitions. [2021-11-13 18:55:56,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 18:55:56,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:56,344 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:56,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:55:56,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 18:55:56,566 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:56,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:56,567 INFO L85 PathProgramCache]: Analyzing trace with hash -145899252, now seen corresponding path program 1 times [2021-11-13 18:55:56,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:56,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306405759] [2021-11-13 18:55:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:56,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:56,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:56,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:56,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:56,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:55:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:56,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-13 18:55:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:55:56,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:56,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306405759] [2021-11-13 18:55:56,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306405759] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:56,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201898281] [2021-11-13 18:55:56,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:56,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:56,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:56,815 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:56,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:55:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:56,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 18:55:56,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:56,995 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 [2021-11-13 18:55:57,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,023 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 [2021-11-13 18:55:57,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:55:57,078 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 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-13 18:55:57,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:55:57,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2021-11-13 18:55:57,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:55:57,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2021-11-13 18:55:57,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:55:57,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2021-11-13 18:55:57,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:55:57,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:55:57,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 66 treesize of output 80 [2021-11-13 18:55:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:55:58,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:55:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:55:58,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201898281] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:55:58,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:55:58,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 7] total 29 [2021-11-13 18:55:58,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238496828] [2021-11-13 18:55:58,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:55:58,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-13 18:55:58,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:55:58,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-13 18:55:58,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:55:58,386 INFO L87 Difference]: Start difference. First operand 79 states and 86 transitions. Second operand has 29 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 26 states have internal predecessors, (97), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-13 18:55:58,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:55:58,949 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-11-13 18:55:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 18:55:58,949 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 26 states have internal predecessors, (97), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) Word has length 50 [2021-11-13 18:55:58,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:55:58,950 INFO L225 Difference]: With dead ends: 85 [2021-11-13 18:55:58,950 INFO L226 Difference]: Without dead ends: 79 [2021-11-13 18:55:58,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 83 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:55:58,952 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 84 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 178.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.37ms SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 227.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:55:58,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 190 Invalid, 430 Unknown, 0 Unchecked, 3.37ms Time], IncrementalHoareTripleChecker [58 Valid, 271 Invalid, 0 Unknown, 101 Unchecked, 227.45ms Time] [2021-11-13 18:55:58,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-13 18:55:58,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-11-13 18:55:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.109375) internal successors, (71), 67 states have internal predecessors, (71), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:55:58,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2021-11-13 18:55:58,955 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 50 [2021-11-13 18:55:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:55:58,956 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2021-11-13 18:55:58,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 26 states have internal predecessors, (97), 6 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (9), 4 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-13 18:55:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2021-11-13 18:55:58,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 18:55:58,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:55:58,957 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:55:58,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-13 18:55:59,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 18:55:59,182 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting Sum2Err3REQUIRES_VIOLATION === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:55:59,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:55:59,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1672569826, now seen corresponding path program 1 times [2021-11-13 18:55:59,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:55:59,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975400062] [2021-11-13 18:55:59,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:59,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:55:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:59,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:55:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:59,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:55:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:59,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:55:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 18:55:59,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:55:59,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975400062] [2021-11-13 18:55:59,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975400062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:55:59,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749986969] [2021-11-13 18:55:59,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:55:59,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:55:59,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:55:59,411 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:55:59,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:55:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:55:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 18:55:59,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:55:59,580 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 [2021-11-13 18:56:00,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:56:00,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 22 treesize of output 10 [2021-11-13 18:56:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:56:00,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:56:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:56:00,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749986969] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:56:00,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:56:00,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 14] total 39 [2021-11-13 18:56:00,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331903664] [2021-11-13 18:56:00,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:56:00,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-13 18:56:00,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:56:00,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-13 18:56:00,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1315, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 18:56:00,683 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 34 states have internal predecessors, (125), 7 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 18:56:01,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:56:01,562 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2021-11-13 18:56:01,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 18:56:01,565 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 34 states have internal predecessors, (125), 7 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 59 [2021-11-13 18:56:01,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:56:01,566 INFO L225 Difference]: With dead ends: 83 [2021-11-13 18:56:01,566 INFO L226 Difference]: Without dead ends: 80 [2021-11-13 18:56:01,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 102 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=319, Invalid=2651, Unknown=0, NotChecked=0, Total=2970 [2021-11-13 18:56:01,568 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 79 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 360.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.49ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 437.09ms IncrementalHoareTripleChecker+Time [2021-11-13 18:56:01,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 260 Invalid, 920 Unknown, 0 Unchecked, 5.49ms Time], IncrementalHoareTripleChecker [40 Valid, 816 Invalid, 0 Unknown, 64 Unchecked, 437.09ms Time] [2021-11-13 18:56:01,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-13 18:56:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-11-13 18:56:01,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 65 states have internal predecessors, (67), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:56:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2021-11-13 18:56:01,574 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 59 [2021-11-13 18:56:01,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:56:01,575 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2021-11-13 18:56:01,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.289473684210526) internal successors, (125), 34 states have internal predecessors, (125), 7 states have call successors, (12), 7 states have call predecessors, (12), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-13 18:56:01,576 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2021-11-13 18:56:01,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 18:56:01,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:56:01,577 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:56:01,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:56:01,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 18:56:01,787 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:56:01,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:56:01,788 INFO L85 PathProgramCache]: Analyzing trace with hash -221788971, now seen corresponding path program 2 times [2021-11-13 18:56:01,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:56:01,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505160060] [2021-11-13 18:56:01,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:56:01,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:56:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:01,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:56:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:01,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:56:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:01,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:56:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:01,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:56:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:56:02,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:56:02,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505160060] [2021-11-13 18:56:02,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505160060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:56:02,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364195485] [2021-11-13 18:56:02,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:56:02,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:02,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:56:02,004 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:56:02,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:56:02,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:56:02,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:56:02,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 18:56:02,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:56:02,188 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 [2021-11-13 18:56:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:56:03,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:56:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:56:03,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364195485] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:56:03,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:56:03,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 13] total 36 [2021-11-13 18:56:03,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794918711] [2021-11-13 18:56:03,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:56:03,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 18:56:03,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:56:03,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 18:56:03,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:56:03,599 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 36 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 32 states have internal predecessors, (132), 6 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-13 18:56:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:56:04,302 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2021-11-13 18:56:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-13 18:56:04,303 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 32 states have internal predecessors, (132), 6 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) Word has length 65 [2021-11-13 18:56:04,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:56:04,304 INFO L225 Difference]: With dead ends: 97 [2021-11-13 18:56:04,304 INFO L226 Difference]: Without dead ends: 94 [2021-11-13 18:56:04,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 114 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=343, Invalid=2413, Unknown=0, NotChecked=0, Total=2756 [2021-11-13 18:56:04,305 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 56 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 191.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.11ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 226.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:56:04,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 339 Invalid, 458 Unknown, 0 Unchecked, 4.11ms Time], IncrementalHoareTripleChecker [29 Valid, 335 Invalid, 0 Unknown, 94 Unchecked, 226.60ms Time] [2021-11-13 18:56:04,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-13 18:56:04,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-11-13 18:56:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 80 states have internal predecessors, (82), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-13 18:56:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2021-11-13 18:56:04,311 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 65 [2021-11-13 18:56:04,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:56:04,311 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2021-11-13 18:56:04,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.7714285714285714) internal successors, (132), 32 states have internal predecessors, (132), 6 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (8), 5 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-13 18:56:04,312 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2021-11-13 18:56:04,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 18:56:04,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:56:04,313 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:56:04,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:56:04,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 18:56:04,535 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:56:04,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:56:04,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1693912745, now seen corresponding path program 1 times [2021-11-13 18:56:04,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:56:04,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183568812] [2021-11-13 18:56:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:56:04,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:56:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:04,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:56:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:04,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:56:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:04,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:56:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:04,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:56:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:04,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:56:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:56:04,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:56:04,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183568812] [2021-11-13 18:56:04,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183568812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:56:04,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839634624] [2021-11-13 18:56:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:56:04,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:04,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:56:04,765 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:56:04,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:56:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:04,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 18:56:04,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:56:04,927 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 [2021-11-13 18:56:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:56:05,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:56:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:56:06,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839634624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:56:06,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:56:06,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 13] total 36 [2021-11-13 18:56:06,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131416958] [2021-11-13 18:56:06,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:56:06,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 18:56:06,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:56:06,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 18:56:06,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 18:56:06,329 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 36 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 33 states have internal predecessors, (134), 6 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-13 18:56:06,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:56:06,813 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2021-11-13 18:56:06,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 18:56:06,813 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 33 states have internal predecessors, (134), 6 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 68 [2021-11-13 18:56:06,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:56:06,814 INFO L225 Difference]: With dead ends: 94 [2021-11-13 18:56:06,814 INFO L226 Difference]: Without dead ends: 91 [2021-11-13 18:56:06,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 119 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=315, Invalid=2235, Unknown=0, NotChecked=0, Total=2550 [2021-11-13 18:56:06,816 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 80 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.02ms SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 138.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:56:06,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 295 Invalid, 331 Unknown, 0 Unchecked, 2.02ms Time], IncrementalHoareTripleChecker [33 Valid, 221 Invalid, 0 Unknown, 77 Unchecked, 138.47ms Time] [2021-11-13 18:56:06,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-13 18:56:06,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2021-11-13 18:56:06,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 65 states have internal predecessors, (66), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:56:06,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2021-11-13 18:56:06,820 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 68 [2021-11-13 18:56:06,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:56:06,821 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2021-11-13 18:56:06,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.8285714285714287) internal successors, (134), 33 states have internal predecessors, (134), 6 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2021-11-13 18:56:06,821 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2021-11-13 18:56:06,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 18:56:06,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:56:06,822 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:56:06,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:56:07,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:07,027 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:56:07,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:56:07,028 INFO L85 PathProgramCache]: Analyzing trace with hash -812327060, now seen corresponding path program 3 times [2021-11-13 18:56:07,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:56:07,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879105870] [2021-11-13 18:56:07,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:56:07,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:56:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:07,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:56:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:07,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:56:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:07,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:56:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:07,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:56:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:07,248 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:56:07,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:56:07,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879105870] [2021-11-13 18:56:07,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879105870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:56:07,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131413640] [2021-11-13 18:56:07,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:56:07,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:07,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:56:07,271 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:56:07,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:56:07,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 18:56:07,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:56:07,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:56:07,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:56:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:56:07,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:56:07,858 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:56:07,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131413640] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:56:07,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:56:07,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2021-11-13 18:56:07,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494619067] [2021-11-13 18:56:07,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:56:07,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:56:07,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:56:07,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:56:07,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:56:07,860 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 10 states have internal predecessors, (66), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:56:08,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:56:08,276 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2021-11-13 18:56:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:56:08,277 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 10 states have internal predecessors, (66), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2021-11-13 18:56:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:56:08,277 INFO L225 Difference]: With dead ends: 84 [2021-11-13 18:56:08,277 INFO L226 Difference]: Without dead ends: 80 [2021-11-13 18:56:08,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:56:08,278 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 63 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 128.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.77ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.83ms IncrementalHoareTripleChecker+Time [2021-11-13 18:56:08,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 132 Invalid, 173 Unknown, 0 Unchecked, 2.77ms Time], IncrementalHoareTripleChecker [23 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 161.83ms Time] [2021-11-13 18:56:08,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-13 18:56:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-13 18:56:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 68 states have internal predecessors, (69), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:56:08,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-11-13 18:56:08,282 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 70 [2021-11-13 18:56:08,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:56:08,282 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-11-13 18:56:08,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 10 states have internal predecessors, (66), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:56:08,282 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-11-13 18:56:08,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-13 18:56:08,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:56:08,283 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:56:08,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:56:08,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:08,484 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:56:08,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:56:08,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1414456326, now seen corresponding path program 4 times [2021-11-13 18:56:08,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:56:08,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089729950] [2021-11-13 18:56:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:56:08,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:56:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:08,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:56:08,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:08,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:56:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:08,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 18:56:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:08,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:56:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:08,706 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:56:08,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:56:08,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089729950] [2021-11-13 18:56:08,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089729950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:56:08,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691740373] [2021-11-13 18:56:08,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:56:08,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:08,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:56:08,708 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:56:08,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:56:08,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:56:08,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:56:08,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-13 18:56:08,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:56:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:56:09,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:56:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:56:09,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691740373] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:56:09,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:56:09,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2021-11-13 18:56:09,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619917374] [2021-11-13 18:56:09,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:56:09,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 18:56:09,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:56:09,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 18:56:09,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:56:09,472 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:56:10,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:56:10,660 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2021-11-13 18:56:10,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:56:10,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 73 [2021-11-13 18:56:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:56:10,662 INFO L225 Difference]: With dead ends: 90 [2021-11-13 18:56:10,662 INFO L226 Difference]: Without dead ends: 86 [2021-11-13 18:56:10,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=264, Invalid=858, Unknown=0, NotChecked=0, Total=1122 [2021-11-13 18:56:10,663 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 80 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.46ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 218.78ms IncrementalHoareTripleChecker+Time [2021-11-13 18:56:10,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 244 Invalid, 350 Unknown, 0 Unchecked, 2.46ms Time], IncrementalHoareTripleChecker [46 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 218.78ms Time] [2021-11-13 18:56:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-13 18:56:10,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-13 18:56:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 74 states have internal predecessors, (75), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:56:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-11-13 18:56:10,667 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 73 [2021-11-13 18:56:10,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:56:10,668 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-11-13 18:56:10,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:56:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-11-13 18:56:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-13 18:56:10,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:56:10,669 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:56:10,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:56:10,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:10,879 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:56:10,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:56:10,879 INFO L85 PathProgramCache]: Analyzing trace with hash -602731962, now seen corresponding path program 5 times [2021-11-13 18:56:10,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:56:10,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943012183] [2021-11-13 18:56:10,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:56:10,880 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:56:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:10,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:56:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:10,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:56:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:11,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 18:56:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:11,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-13 18:56:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:56:11,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:56:11,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943012183] [2021-11-13 18:56:11,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943012183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:56:11,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121660351] [2021-11-13 18:56:11,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:56:11,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:11,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:56:11,271 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:56:11,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:56:12,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-13 18:56:12,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:56:12,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 18:56:12,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:56:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:56:12,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:56:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:56:13,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121660351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:56:13,483 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:56:13,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2021-11-13 18:56:13,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549725009] [2021-11-13 18:56:13,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:56:13,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-13 18:56:13,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:56:13,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-13 18:56:13,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1113, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 18:56:13,485 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 37 states have internal predecessors, (93), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:56:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:56:29,593 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2021-11-13 18:56:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 18:56:29,593 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 37 states have internal predecessors, (93), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 79 [2021-11-13 18:56:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:56:29,594 INFO L225 Difference]: With dead ends: 102 [2021-11-13 18:56:29,594 INFO L226 Difference]: Without dead ends: 98 [2021-11-13 18:56:29,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=911, Invalid=3249, Unknown=0, NotChecked=0, Total=4160 [2021-11-13 18:56:29,596 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 151 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 487.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.41ms SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 557.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:56:29,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 366 Invalid, 758 Unknown, 0 Unchecked, 12.41ms Time], IncrementalHoareTripleChecker [123 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 557.27ms Time] [2021-11-13 18:56:29,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-13 18:56:29,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-13 18:56:29,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 86 states have internal predecessors, (87), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 18:56:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2021-11-13 18:56:29,601 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 79 [2021-11-13 18:56:29,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:56:29,601 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2021-11-13 18:56:29,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 37 states have internal predecessors, (93), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:56:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2021-11-13 18:56:29,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-13 18:56:29,602 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:56:29,603 INFO L514 BasicCegarLoop]: trace histogram [22, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:56:29,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:56:29,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-13 18:56:29,808 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 18:56:29,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:56:29,810 INFO L85 PathProgramCache]: Analyzing trace with hash -55687482, now seen corresponding path program 6 times [2021-11-13 18:56:29,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:56:29,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585336207] [2021-11-13 18:56:29,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:56:29,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:56:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:29,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:56:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:29,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:56:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:30,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-11-13 18:56:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:30,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-13 18:56:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:56:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:56:30,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:56:30,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585336207] [2021-11-13 18:56:30,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585336207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:56:30,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137467438] [2021-11-13 18:56:30,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:56:30,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:56:30,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:56:30,760 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:56:30,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:58:13,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-13 18:58:13,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:58:13,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-13 18:58:13,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:58:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:58:14,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:58:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 18:58:16,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137467438] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:58:16,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:58:16,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 75 [2021-11-13 18:58:16,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532517806] [2021-11-13 18:58:16,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:58:16,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-13 18:58:16,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:58:16,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-13 18:58:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=4255, Unknown=0, NotChecked=0, Total=5550 [2021-11-13 18:58:16,707 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 75 states, 75 states have (on average 1.72) internal successors, (129), 73 states have internal predecessors, (129), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:58:52,379 WARN L227 SmtUtils]: Spent 8.26s on a formula simplification. DAG size of input: 145 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:59:34,649 WARN L227 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 140 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:59:36,717 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (mod |c_#Ultimate.C_memset_#amount| 4294967296)) (.cse1 (not (= 94 |c_#Ultimate.C_memset_#amount|)))) (and (= |c_#t~string0.base| |c_old(#t~string0.base)|) (= |c_old(#length)| |c_#length|) (= |c_old(#t~string1.offset)| |c_#t~string1.offset|) (or (< (mod (+ |c_#Ultimate.C_memset_#t~loopctr19| 12) 4294967296) .cse0) .cse1) (or .cse1 (< (mod (+ 6 |c_#Ultimate.C_memset_#t~loopctr19|) 4294967296) .cse0)) (= |c_#t~string0.offset| |c_old(#t~string0.offset)|) (or .cse1 (< (mod (+ 7 |c_#Ultimate.C_memset_#t~loopctr19|) 4294967296) .cse0)) (or (< (mod (+ |c_#Ultimate.C_memset_#t~loopctr19| 10) 4294967296) .cse0) .cse1) (or (< (mod (+ |c_#Ultimate.C_memset_#t~loopctr19| 17) 4294967296) .cse0) .cse1) (or .cse1 (< (mod (+ 3 |c_#Ultimate.C_memset_#t~loopctr19|) 4294967296) .cse0)) (or (< (mod (+ |c_#Ultimate.C_memset_#t~loopctr19| 8) 4294967296) .cse0) .cse1) (or (< (mod (+ |c_#Ultimate.C_memset_#t~loopctr19| 13) 4294967296) .cse0) .cse1) (or (< (mod (+ 16 |c_#Ultimate.C_memset_#t~loopctr19|) 4294967296) .cse0) .cse1) (or (< (mod (+ 14 |c_#Ultimate.C_memset_#t~loopctr19|) 4294967296) .cse0) .cse1) (or .cse1 (< (mod (+ |c_#Ultimate.C_memset_#t~loopctr19| 18) 4294967296) .cse0)) (or (< (mod (+ 5 |c_#Ultimate.C_memset_#t~loopctr19|) 4294967296) .cse0) .cse1) (or .cse1 (< (mod (+ |c_#Ultimate.C_memset_#t~loopctr19| 1) 4294967296) .cse0)) (or .cse1 (< (mod (+ 9 |c_#Ultimate.C_memset_#t~loopctr19|) 4294967296) .cse0)) (or .cse1 (< (mod (+ |c_#Ultimate.C_memset_#t~loopctr19| 20) 4294967296) .cse0)) (or .cse1 (< (mod |c_#Ultimate.C_memset_#t~loopctr19| 4294967296) .cse0)) (or .cse1 (< (mod (+ 2 |c_#Ultimate.C_memset_#t~loopctr19|) 4294967296) .cse0)) (or .cse1 (< (mod (+ 19 |c_#Ultimate.C_memset_#t~loopctr19|) 4294967296) .cse0)) (= |c_old(#valid)| |c_#valid|) (or .cse1 (< (mod (+ |c_#Ultimate.C_memset_#t~loopctr19| 4) 4294967296) .cse0)) (= |c_#t~string1.base| |c_old(#t~string1.base)|) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (or (< (mod (+ |c_#Ultimate.C_memset_#t~loopctr19| 15) 4294967296) .cse0) .cse1) (or (< (mod (+ |c_#Ultimate.C_memset_#t~loopctr19| 11) 4294967296) .cse0) .cse1) (= |c_old(#NULL.base)| |c_#NULL.base|))) is different from false [2021-11-13 19:01:13,476 WARN L227 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 115 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 19:03:34,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 19:03:34,932 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2021-11-13 19:03:34,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-13 19:03:34,933 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.72) internal successors, (129), 73 states have internal predecessors, (129), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 91 [2021-11-13 19:03:34,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 19:03:34,933 INFO L225 Difference]: With dead ends: 127 [2021-11-13 19:03:34,933 INFO L226 Difference]: Without dead ends: 122 [2021-11-13 19:03:34,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 320.7s TimeCoverageRelationStatistics Valid=3152, Invalid=11848, Unknown=10, NotChecked=242, Total=15252 [2021-11-13 19:03:34,938 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 387 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1692 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 890.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 2051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.78ms SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 1692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 1043.68ms IncrementalHoareTripleChecker+Time [2021-11-13 19:03:34,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 704 Invalid, 2051 Unknown, 0 Unchecked, 7.78ms Time], IncrementalHoareTripleChecker [357 Valid, 1692 Invalid, 0 Unknown, 2 Unchecked, 1043.68ms Time] [2021-11-13 19:03:34,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-13 19:03:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2021-11-13 19:03:34,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 110 states have internal predecessors, (111), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 19:03:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2021-11-13 19:03:34,942 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 91 [2021-11-13 19:03:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 19:03:34,943 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2021-11-13 19:03:34,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.72) internal successors, (129), 73 states have internal predecessors, (129), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 19:03:34,943 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2021-11-13 19:03:34,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-13 19:03:34,944 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 19:03:34,945 INFO L514 BasicCegarLoop]: trace histogram [46, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 19:03:34,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 19:03:35,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 19:03:35,149 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr16ENSURES_VIOLATIONMEMORY_LEAK === [SumErr0REQUIRES_VIOLATION, SumErr1REQUIRES_VIOLATION, SumErr2REQUIRES_VIOLATION, SumErr3REQUIRES_VIOLATION, Sum2Err0REQUIRES_VIOLATION (and 20 more)] === [2021-11-13 19:03:35,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 19:03:35,150 INFO L85 PathProgramCache]: Analyzing trace with hash 765493190, now seen corresponding path program 7 times [2021-11-13 19:03:35,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 19:03:35,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154352264] [2021-11-13 19:03:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 19:03:35,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 19:03:35,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 19:03:35,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 19:03:35,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 19:03:35,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 19:03:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 19:03:37,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 19:03:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 19:03:37,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 19:03:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 19:03:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 19:03:37,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 19:03:37,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154352264] [2021-11-13 19:03:37,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154352264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 19:03:37,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069883439] [2021-11-13 19:03:37,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 19:03:37,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 19:03:37,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 19:03:37,575 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 19:03:37,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6f3c4bc4-e7f8-4bc7-827e-93e7b1dbd7c1/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 19:03:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 19:03:38,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-13 19:03:38,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 19:03:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 19:03:41,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 19:03:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 19:03:58,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069883439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 19:03:58,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 19:03:58,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 50, 50] total 147 [2021-11-13 19:03:58,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29500886] [2021-11-13 19:03:58,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 19:03:58,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2021-11-13 19:03:58,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 19:03:58,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2021-11-13 19:03:58,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4899, Invalid=16563, Unknown=0, NotChecked=0, Total=21462 [2021-11-13 19:03:58,744 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand has 147 states, 147 states have (on average 1.3673469387755102) internal successors, (201), 145 states have internal predecessors, (201), 2 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 19:07:29,209 WARN L227 SmtUtils]: Spent 3.33m on a formula simplification. DAG size of input: 309 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 19:09:36,630 WARN L227 SmtUtils]: Spent 1.96m on a formula simplification. DAG size of input: 303 DAG size of output: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)