./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G --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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:33:02,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:33:02,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:33:02,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:33:02,611 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:33:02,617 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:33:02,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:33:02,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:33:02,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:33:02,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:33:02,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:33:02,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:33:02,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:33:02,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:33:02,647 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:33:02,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:33:02,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:33:02,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:33:02,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:33:02,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:33:02,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:33:02,666 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:33:02,668 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:33:02,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:33:02,677 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:33:02,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:33:02,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:33:02,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:33:02,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:33:02,685 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:33:02,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:33:02,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:33:02,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:33:02,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:33:02,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:33:02,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:33:02,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:33:02,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:33:02,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:33:02,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:33:02,697 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:33:02,698 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 13:33:02,752 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:33:02,752 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:33:02,753 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:33:02,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:33:02,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:33:02,756 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:33:02,756 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:33:02,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:33:02,757 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:33:02,757 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 13:33:02,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:33:02,759 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:33:02,759 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:33:02,760 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 13:33:02,760 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 13:33:02,760 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 13:33:02,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:33:02,761 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 13:33:02,761 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:33:02,761 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:33:02,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:33:02,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:33:02,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:33:02,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:33:02,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:33:02,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:33:02,764 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:33:02,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:33:02,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:33:02,767 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_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2021-11-23 13:33:03,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:33:03,084 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:33:03,088 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:33:03,089 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:33:03,091 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:33:03,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2021-11-23 13:33:03,195 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/data/226d7ad1c/2c5b8153950b4eedae2315803317dd48/FLAGb57e20442 [2021-11-23 13:33:03,772 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:33:03,777 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/sv-benchmarks/c/verifythis/prefixsum_iter.c [2021-11-23 13:33:03,784 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/data/226d7ad1c/2c5b8153950b4eedae2315803317dd48/FLAGb57e20442 [2021-11-23 13:33:04,090 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/data/226d7ad1c/2c5b8153950b4eedae2315803317dd48 [2021-11-23 13:33:04,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:33:04,095 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:33:04,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:33:04,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:33:04,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:33:04,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:33:04" (1/1) ... [2021-11-23 13:33:04,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1494f4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:33:04, skipping insertion in model container [2021-11-23 13:33:04,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:33:04" (1/1) ... [2021-11-23 13:33:04,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:33:04,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:33:04,353 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2021-11-23 13:33:04,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:33:04,409 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:33:04,425 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/sv-benchmarks/c/verifythis/prefixsum_iter.c[526,539] [2021-11-23 13:33:04,444 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:33:04,462 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:33:04,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:33:04 WrapperNode [2021-11-23 13:33:04,463 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:33:04,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:33:04,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:33:04,465 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:33:04,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:33:04" (1/1) ... [2021-11-23 13:33:04,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:33:04" (1/1) ... [2021-11-23 13:33:04,525 INFO L137 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 139 [2021-11-23 13:33:04,525 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:33:04,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:33:04,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:33:04,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:33:04,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:33:04" (1/1) ... [2021-11-23 13:33:04,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:33:04" (1/1) ... [2021-11-23 13:33:04,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:33:04" (1/1) ... [2021-11-23 13:33:04,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:33:04" (1/1) ... [2021-11-23 13:33:04,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:33:04" (1/1) ... [2021-11-23 13:33:04,559 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:33:04" (1/1) ... [2021-11-23 13:33:04,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:33:04" (1/1) ... [2021-11-23 13:33:04,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:33:04,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:33:04,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:33:04,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:33:04,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:33:04" (1/1) ... [2021-11-23 13:33:04,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:33:04,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:33:04,635 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:33:04,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:33:04,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 13:33:04,684 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 13:33:04,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:33:04,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 13:33:04,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:33:04,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:33:04,686 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:33:04,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:33:04,779 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:33:04,781 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:33:05,301 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:33:05,310 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:33:05,310 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-23 13:33:05,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:33:05 BoogieIcfgContainer [2021-11-23 13:33:05,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:33:05,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:33:05,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:33:05,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:33:05,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:33:04" (1/3) ... [2021-11-23 13:33:05,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60aea263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:33:05, skipping insertion in model container [2021-11-23 13:33:05,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:33:04" (2/3) ... [2021-11-23 13:33:05,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60aea263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:33:05, skipping insertion in model container [2021-11-23 13:33:05,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:33:05" (3/3) ... [2021-11-23 13:33:05,323 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2021-11-23 13:33:05,330 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:33:05,330 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2021-11-23 13:33:05,387 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:33:05,407 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 [2021-11-23 13:33:05,407 INFO L340 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2021-11-23 13:33:05,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 92 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:05,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 13:33:05,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:33:05,445 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:33:05,445 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-23 13:33:05,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:33:05,452 INFO L85 PathProgramCache]: Analyzing trace with hash -950329357, now seen corresponding path program 1 times [2021-11-23 13:33:05,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:33:05,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94636629] [2021-11-23 13:33:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:33:05,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:33:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:33:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:33:05,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:33:05,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94636629] [2021-11-23 13:33:05,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94636629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:33:05,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:33:05,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:33:05,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866773834] [2021-11-23 13:33:05,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:33:05,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 13:33:05,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:33:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 13:33:05,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:33:05,768 INFO L87 Difference]: Start difference. First operand has 93 states, 58 states have (on average 1.8793103448275863) internal successors, (109), 92 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:05,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:33:05,803 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2021-11-23 13:33:05,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 13:33:05,805 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 13:33:05,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:33:05,819 INFO L225 Difference]: With dead ends: 93 [2021-11-23 13:33:05,819 INFO L226 Difference]: Without dead ends: 91 [2021-11-23 13:33:05,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 13:33:05,828 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:33:05,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:33:05,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-23 13:33:05,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-23 13:33:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 57 states have (on average 1.7017543859649122) internal successors, (97), 90 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:05,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2021-11-23 13:33:05,895 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 13 [2021-11-23 13:33:05,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:33:05,895 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2021-11-23 13:33:05,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2021-11-23 13:33:05,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 13:33:05,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:33:05,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:33:05,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:33:05,898 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-23 13:33:05,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:33:05,903 INFO L85 PathProgramCache]: Analyzing trace with hash -192006477, now seen corresponding path program 1 times [2021-11-23 13:33:05,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:33:05,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263935647] [2021-11-23 13:33:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:33:05,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:33:05,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:33:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:33:06,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:33:06,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263935647] [2021-11-23 13:33:06,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263935647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:33:06,125 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:33:06,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:33:06,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326467747] [2021-11-23 13:33:06,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:33:06,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:33:06,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:33:06,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:33:06,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:33:06,129 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:06,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:33:06,308 INFO L93 Difference]: Finished difference Result 89 states and 95 transitions. [2021-11-23 13:33:06,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:33:06,309 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 13:33:06,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:33:06,313 INFO L225 Difference]: With dead ends: 89 [2021-11-23 13:33:06,314 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 13:33:06,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:33:06,318 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 150 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:33:06,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 84 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:33:06,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 13:33:06,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-23 13:33:06,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 88 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:06,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 95 transitions. [2021-11-23 13:33:06,336 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 95 transitions. Word has length 13 [2021-11-23 13:33:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:33:06,336 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 95 transitions. [2021-11-23 13:33:06,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 95 transitions. [2021-11-23 13:33:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 13:33:06,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:33:06,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:33:06,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:33:06,345 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-23 13:33:06,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:33:06,346 INFO L85 PathProgramCache]: Analyzing trace with hash -192006476, now seen corresponding path program 1 times [2021-11-23 13:33:06,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:33:06,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013278873] [2021-11-23 13:33:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:33:06,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:33:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:33:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:33:06,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:33:06,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013278873] [2021-11-23 13:33:06,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013278873] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:33:06,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:33:06,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:33:06,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476908312] [2021-11-23 13:33:06,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:33:06,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:33:06,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:33:06,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:33:06,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:33:06,572 INFO L87 Difference]: Start difference. First operand 89 states and 95 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:06,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:33:06,917 INFO L93 Difference]: Finished difference Result 164 states and 175 transitions. [2021-11-23 13:33:06,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 13:33:06,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 13:33:06,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:33:06,923 INFO L225 Difference]: With dead ends: 164 [2021-11-23 13:33:06,923 INFO L226 Difference]: Without dead ends: 164 [2021-11-23 13:33:06,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:33:06,927 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 331 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:33:06,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 174 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:33:06,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-23 13:33:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 90. [2021-11-23 13:33:06,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 89 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:06,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2021-11-23 13:33:06,959 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 13 [2021-11-23 13:33:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:33:06,959 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2021-11-23 13:33:06,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2021-11-23 13:33:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 13:33:06,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:33:06,961 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:33:06,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:33:06,962 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-23 13:33:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:33:06,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1657233474, now seen corresponding path program 1 times [2021-11-23 13:33:06,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:33:06,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263704815] [2021-11-23 13:33:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:33:06,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:33:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:33:07,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:33:07,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:33:07,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263704815] [2021-11-23 13:33:07,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263704815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:33:07,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:33:07,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:33:07,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364364693] [2021-11-23 13:33:07,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:33:07,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:33:07,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:33:07,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:33:07,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:33:07,072 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:07,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:33:07,151 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2021-11-23 13:33:07,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:33:07,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 13:33:07,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:33:07,154 INFO L225 Difference]: With dead ends: 89 [2021-11-23 13:33:07,154 INFO L226 Difference]: Without dead ends: 89 [2021-11-23 13:33:07,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:33:07,166 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 145 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:33:07,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 85 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:33:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-11-23 13:33:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-11-23 13:33:07,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 59 states have (on average 1.6271186440677967) internal successors, (96), 88 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2021-11-23 13:33:07,185 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 14 [2021-11-23 13:33:07,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:33:07,186 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2021-11-23 13:33:07,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:07,187 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2021-11-23 13:33:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 13:33:07,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:33:07,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:33:07,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:33:07,188 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-23 13:33:07,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:33:07,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1657233473, now seen corresponding path program 1 times [2021-11-23 13:33:07,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:33:07,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138765930] [2021-11-23 13:33:07,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:33:07,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:33:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:33:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:33:07,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:33:07,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138765930] [2021-11-23 13:33:07,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138765930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:33:07,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:33:07,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:33:07,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432135165] [2021-11-23 13:33:07,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:33:07,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:33:07,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:33:07,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:33:07,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:33:07,371 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:07,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:33:07,611 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2021-11-23 13:33:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:33:07,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 13:33:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:33:07,614 INFO L225 Difference]: With dead ends: 160 [2021-11-23 13:33:07,614 INFO L226 Difference]: Without dead ends: 160 [2021-11-23 13:33:07,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:33:07,615 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 238 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:33:07,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 160 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:33:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-23 13:33:07,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 127. [2021-11-23 13:33:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 97 states have (on average 1.6804123711340206) internal successors, (163), 126 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:07,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2021-11-23 13:33:07,640 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 14 [2021-11-23 13:33:07,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:33:07,640 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2021-11-23 13:33:07,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:07,645 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2021-11-23 13:33:07,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 13:33:07,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:33:07,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:33:07,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:33:07,647 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-23 13:33:07,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:33:07,648 INFO L85 PathProgramCache]: Analyzing trace with hash 830026466, now seen corresponding path program 1 times [2021-11-23 13:33:07,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:33:07,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975689789] [2021-11-23 13:33:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:33:07,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:33:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:33:07,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:33:07,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:33:07,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975689789] [2021-11-23 13:33:07,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975689789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:33:07,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:33:07,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 13:33:07,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946683682] [2021-11-23 13:33:07,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:33:07,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:33:07,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:33:07,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:33:07,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:33:07,776 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:07,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:33:07,949 INFO L93 Difference]: Finished difference Result 292 states and 310 transitions. [2021-11-23 13:33:07,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:33:07,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 13:33:07,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:33:07,953 INFO L225 Difference]: With dead ends: 292 [2021-11-23 13:33:07,953 INFO L226 Difference]: Without dead ends: 292 [2021-11-23 13:33:07,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:33:07,954 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 506 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:33:07,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 381 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:33:07,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-23 13:33:07,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 121. [2021-11-23 13:33:07,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 91 states have (on average 1.6373626373626373) internal successors, (149), 120 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:07,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2021-11-23 13:33:07,963 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 16 [2021-11-23 13:33:07,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:33:07,964 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2021-11-23 13:33:07,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:07,964 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2021-11-23 13:33:07,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 13:33:07,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:33:07,966 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:33:07,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:33:07,966 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-23 13:33:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:33:07,967 INFO L85 PathProgramCache]: Analyzing trace with hash -39024960, now seen corresponding path program 1 times [2021-11-23 13:33:07,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:33:07,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606316025] [2021-11-23 13:33:07,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:33:07,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:33:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:33:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:33:08,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:33:08,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606316025] [2021-11-23 13:33:08,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606316025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:33:08,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:33:08,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 13:33:08,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435510355] [2021-11-23 13:33:08,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:33:08,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:33:08,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:33:08,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:33:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:33:08,131 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:10,147 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 13:33:10,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:33:10,535 INFO L93 Difference]: Finished difference Result 209 states and 243 transitions. [2021-11-23 13:33:10,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:33:10,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 13:33:10,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:33:10,542 INFO L225 Difference]: With dead ends: 209 [2021-11-23 13:33:10,542 INFO L226 Difference]: Without dead ends: 209 [2021-11-23 13:33:10,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:33:10,545 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 367 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:33:10,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 448 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 13:33:10,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-23 13:33:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 129. [2021-11-23 13:33:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 99 states have (on average 1.595959595959596) internal successors, (158), 128 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 158 transitions. [2021-11-23 13:33:10,555 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 158 transitions. Word has length 17 [2021-11-23 13:33:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:33:10,555 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 158 transitions. [2021-11-23 13:33:10,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 158 transitions. [2021-11-23 13:33:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 13:33:10,557 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:33:10,557 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:33:10,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:33:10,558 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-23 13:33:10,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:33:10,560 INFO L85 PathProgramCache]: Analyzing trace with hash 206568546, now seen corresponding path program 1 times [2021-11-23 13:33:10,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:33:10,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331588880] [2021-11-23 13:33:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:33:10,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:33:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:33:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:33:10,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:33:10,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331588880] [2021-11-23 13:33:10,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331588880] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:33:10,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247722557] [2021-11-23 13:33:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:33:10,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:33:10,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:33:10,810 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:33:10,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:33:10,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:33:10,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 13:33:10,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:33:11,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-11-23 13:33:11,163 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-23 13:33:11,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 13:33:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:33:11,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:33:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:33:12,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247722557] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:33:12,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:33:12,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2021-11-23 13:33:12,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270499347] [2021-11-23 13:33:12,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:33:12,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 13:33:12,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:33:12,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 13:33:12,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-23 13:33:12,177 INFO L87 Difference]: Start difference. First operand 129 states and 158 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:33:12,958 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2021-11-23 13:33:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:33:12,959 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 13:33:12,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:33:12,960 INFO L225 Difference]: With dead ends: 155 [2021-11-23 13:33:12,960 INFO L226 Difference]: Without dead ends: 155 [2021-11-23 13:33:12,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:33:12,961 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 717 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 717 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:33:12,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [717 Valid, 374 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 272 Invalid, 0 Unknown, 3 Unchecked, 0.5s Time] [2021-11-23 13:33:12,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-23 13:33:12,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 128. [2021-11-23 13:33:12,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 99 states have (on average 1.5858585858585859) internal successors, (157), 127 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:12,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 157 transitions. [2021-11-23 13:33:12,967 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 157 transitions. Word has length 18 [2021-11-23 13:33:12,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:33:12,967 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 157 transitions. [2021-11-23 13:33:12,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:33:12,967 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 157 transitions. [2021-11-23 13:33:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 13:33:12,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:33:12,968 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:33:13,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 13:33:13,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 13:33:13,169 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 30 more)] === [2021-11-23 13:33:13,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:33:13,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1267399976, now seen corresponding path program 1 times [2021-11-23 13:33:13,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:33:13,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317229408] [2021-11-23 13:33:13,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:33:13,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:33:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:33:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:33:13,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:33:13,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317229408] [2021-11-23 13:33:13,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317229408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:33:13,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315326836] [2021-11-23 13:33:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:33:13,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:33:13,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:33:13,431 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:33:13,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de452963-918b-4528-8a5a-aca300dc4702/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process