./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i --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_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/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_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/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_83dbe396-d671-4796-b1a2-d5eefee3d3bb/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 332083c9703e7f789c3b57b3574f68dffe1c5555ad9f8a0d56f0eaba0a86f436 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 13:12:25,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 13:12:25,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 13:12:25,603 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 13:12:25,604 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 13:12:25,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 13:12:25,608 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 13:12:25,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 13:12:25,613 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 13:12:25,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 13:12:25,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 13:12:25,618 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 13:12:25,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 13:12:25,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 13:12:25,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 13:12:25,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 13:12:25,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 13:12:25,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 13:12:25,630 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 13:12:25,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 13:12:25,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 13:12:25,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 13:12:25,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 13:12:25,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 13:12:25,646 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 13:12:25,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 13:12:25,647 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 13:12:25,649 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 13:12:25,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 13:12:25,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 13:12:25,651 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 13:12:25,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 13:12:25,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 13:12:25,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 13:12:25,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 13:12:25,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 13:12:25,658 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 13:12:25,658 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 13:12:25,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 13:12:25,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 13:12:25,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 13:12:25,662 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-23 13:12:25,693 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 13:12:25,693 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 13:12:25,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 13:12:25,694 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 13:12:25,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 13:12:25,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 13:12:25,696 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 13:12:25,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 13:12:25,696 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 13:12:25,697 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 13:12:25,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 13:12:25,697 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 13:12:25,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 13:12:25,698 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 13:12:25,698 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 13:12:25,698 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 13:12:25,698 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 13:12:25,699 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 13:12:25,704 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 13:12:25,705 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 13:12:25,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 13:12:25,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 13:12:25,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 13:12:25,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:12:25,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 13:12:25,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 13:12:25,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 13:12:25,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 13:12:25,707 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 13:12:25,707 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_83dbe396-d671-4796-b1a2-d5eefee3d3bb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 332083c9703e7f789c3b57b3574f68dffe1c5555ad9f8a0d56f0eaba0a86f436 [2021-11-23 13:12:26,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 13:12:26,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 13:12:26,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 13:12:26,055 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 13:12:26,056 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 13:12:26,057 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2021-11-23 13:12:26,144 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/data/e1b074ace/88d6de4d9ec443ecad721c046aff0923/FLAG505be4fe1 [2021-11-23 13:12:26,693 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 13:12:26,694 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/sv-benchmarks/c/array-memsafety/subseq-alloca-2.i [2021-11-23 13:12:26,708 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/data/e1b074ace/88d6de4d9ec443ecad721c046aff0923/FLAG505be4fe1 [2021-11-23 13:12:27,010 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/data/e1b074ace/88d6de4d9ec443ecad721c046aff0923 [2021-11-23 13:12:27,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 13:12:27,015 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 13:12:27,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 13:12:27,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 13:12:27,034 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 13:12:27,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:12:27" (1/1) ... [2021-11-23 13:12:27,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c6895fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:12:27, skipping insertion in model container [2021-11-23 13:12:27,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 01:12:27" (1/1) ... [2021-11-23 13:12:27,047 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 13:12:27,105 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 13:12:27,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:12:27,485 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 13:12:27,529 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 13:12:27,563 INFO L208 MainTranslator]: Completed translation [2021-11-23 13:12:27,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:12:27 WrapperNode [2021-11-23 13:12:27,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 13:12:27,566 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 13:12:27,566 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 13:12:27,566 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 13:12:27,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:12:27" (1/1) ... [2021-11-23 13:12:27,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:12:27" (1/1) ... [2021-11-23 13:12:27,655 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2021-11-23 13:12:27,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 13:12:27,658 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 13:12:27,658 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 13:12:27,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 13:12:27,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:12:27" (1/1) ... [2021-11-23 13:12:27,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:12:27" (1/1) ... [2021-11-23 13:12:27,676 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:12:27" (1/1) ... [2021-11-23 13:12:27,677 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:12:27" (1/1) ... [2021-11-23 13:12:27,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:12:27" (1/1) ... [2021-11-23 13:12:27,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:12:27" (1/1) ... [2021-11-23 13:12:27,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:12:27" (1/1) ... [2021-11-23 13:12:27,706 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 13:12:27,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 13:12:27,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 13:12:27,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 13:12:27,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:12:27" (1/1) ... [2021-11-23 13:12:27,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 13:12:27,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:12:27,757 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 13:12:27,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 13:12:27,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 13:12:27,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 13:12:27,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 13:12:27,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 13:12:27,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 13:12:27,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 13:12:27,930 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 13:12:27,932 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 13:12:28,277 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 13:12:28,288 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 13:12:28,289 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 13:12:28,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:12:28 BoogieIcfgContainer [2021-11-23 13:12:28,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 13:12:28,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 13:12:28,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 13:12:28,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 13:12:28,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 01:12:27" (1/3) ... [2021-11-23 13:12:28,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3c4e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:12:28, skipping insertion in model container [2021-11-23 13:12:28,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 01:12:27" (2/3) ... [2021-11-23 13:12:28,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3c4e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 01:12:28, skipping insertion in model container [2021-11-23 13:12:28,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:12:28" (3/3) ... [2021-11-23 13:12:28,304 INFO L111 eAbstractionObserver]: Analyzing ICFG subseq-alloca-2.i [2021-11-23 13:12:28,316 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 13:12:28,316 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-11-23 13:12:28,373 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 13:12:28,381 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 13:12:28,382 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-11-23 13:12:28,400 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.9375) internal successors, (62), 51 states have internal predecessors, (62), 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 13:12:28,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 13:12:28,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:28,409 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:28,410 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:28,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:28,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-11-23 13:12:28,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:28,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917403091] [2021-11-23 13:12:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:28,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:28,638 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 13:12:28,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:28,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917403091] [2021-11-23 13:12:28,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917403091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:28,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:28,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:12:28,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791476420] [2021-11-23 13:12:28,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:28,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:12:28,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:28,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:12:28,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:12:28,683 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.9375) internal successors, (62), 51 states have internal predecessors, (62), 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 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 13:12:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:28,737 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2021-11-23 13:12:28,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:12:28,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-11-23 13:12:28,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:28,750 INFO L225 Difference]: With dead ends: 96 [2021-11-23 13:12:28,750 INFO L226 Difference]: Without dead ends: 92 [2021-11-23 13:12:28,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:12:28,756 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 94 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:28,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 108 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:12:28,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-23 13:12:28,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 53. [2021-11-23 13:12:28,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 52 states have internal predecessors, (61), 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 13:12:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-11-23 13:12:28,801 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2021-11-23 13:12:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:28,801 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-11-23 13:12:28,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 13:12:28,802 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-11-23 13:12:28,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 13:12:28,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:28,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:28,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 13:12:28,804 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:28,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:28,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-11-23 13:12:28,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:28,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816402758] [2021-11-23 13:12:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:28,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:28,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:28,876 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 13:12:28,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:28,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816402758] [2021-11-23 13:12:28,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816402758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:28,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:28,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:12:28,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272924818] [2021-11-23 13:12:28,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:28,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:12:28,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:12:28,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:12:28,885 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 13:12:28,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:28,972 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-11-23 13:12:28,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:12:28,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-11-23 13:12:28,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:28,976 INFO L225 Difference]: With dead ends: 51 [2021-11-23 13:12:28,977 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 13:12:28,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:12:28,980 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:28,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:12:28,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 13:12:28,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-23 13:12:28,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 states have internal predecessors, (59), 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 13:12:28,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-11-23 13:12:29,000 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2021-11-23 13:12:29,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:29,001 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-11-23 13:12:29,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 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 13:12:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-11-23 13:12:29,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 13:12:29,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:29,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:29,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 13:12:29,007 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:29,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:29,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-11-23 13:12:29,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:29,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010127697] [2021-11-23 13:12:29,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:29,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:29,150 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 13:12:29,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:29,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010127697] [2021-11-23 13:12:29,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010127697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:29,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:29,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:12:29,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651050423] [2021-11-23 13:12:29,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:29,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:12:29,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:29,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:12:29,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:12:29,161 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 13:12:29,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:29,321 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2021-11-23 13:12:29,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:12:29,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2021-11-23 13:12:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:29,324 INFO L225 Difference]: With dead ends: 93 [2021-11-23 13:12:29,324 INFO L226 Difference]: Without dead ends: 93 [2021-11-23 13:12:29,324 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 13:12:29,326 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 48 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:29,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 94 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:12:29,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-23 13:12:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2021-11-23 13:12:29,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 52 states have internal predecessors, (62), 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 13:12:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-11-23 13:12:29,335 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 7 [2021-11-23 13:12:29,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:29,338 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-11-23 13:12:29,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 13:12:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-11-23 13:12:29,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 13:12:29,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:29,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:29,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 13:12:29,340 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:29,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:29,342 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-11-23 13:12:29,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:29,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644963181] [2021-11-23 13:12:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:29,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:29,478 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 13:12:29,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:29,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644963181] [2021-11-23 13:12:29,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644963181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:29,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:29,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:12:29,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725810333] [2021-11-23 13:12:29,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:29,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:12:29,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:29,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:12:29,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:12:29,513 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 13:12:29,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:29,575 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2021-11-23 13:12:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:12:29,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-11-23 13:12:29,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:29,576 INFO L225 Difference]: With dead ends: 52 [2021-11-23 13:12:29,576 INFO L226 Difference]: Without dead ends: 52 [2021-11-23 13:12:29,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:12:29,578 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 93 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:29,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:12:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-23 13:12:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-23 13:12:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 51 states have internal predecessors, (61), 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 13:12:29,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2021-11-23 13:12:29,586 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 9 [2021-11-23 13:12:29,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:29,586 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2021-11-23 13:12:29,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 13:12:29,587 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2021-11-23 13:12:29,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 13:12:29,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:29,587 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:29,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 13:12:29,588 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:29,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:29,589 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-11-23 13:12:29,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:29,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870655172] [2021-11-23 13:12:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:29,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:29,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:29,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870655172] [2021-11-23 13:12:29,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870655172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:29,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:29,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:12:29,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680479273] [2021-11-23 13:12:29,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:29,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:12:29,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:29,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:12:29,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:12:29,640 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 13:12:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:29,670 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2021-11-23 13:12:29,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:12:29,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2021-11-23 13:12:29,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:29,674 INFO L225 Difference]: With dead ends: 94 [2021-11-23 13:12:29,674 INFO L226 Difference]: Without dead ends: 94 [2021-11-23 13:12:29,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:12:29,675 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:29,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 102 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:12:29,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-23 13:12:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2021-11-23 13:12:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 62 states have internal predecessors, (75), 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 13:12:29,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2021-11-23 13:12:29,688 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2021-11-23 13:12:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:29,689 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2021-11-23 13:12:29,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 13:12:29,689 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2021-11-23 13:12:29,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 13:12:29,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:29,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:29,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 13:12:29,695 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:29,696 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-11-23 13:12:29,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:29,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580622403] [2021-11-23 13:12:29,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:29,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:29,751 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 13:12:29,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:29,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580622403] [2021-11-23 13:12:29,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580622403] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:29,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:29,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 13:12:29,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152255994] [2021-11-23 13:12:29,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:29,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:12:29,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:29,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:12:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:12:29,754 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 13:12:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:29,796 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2021-11-23 13:12:29,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:12:29,797 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-23 13:12:29,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:29,798 INFO L225 Difference]: With dead ends: 61 [2021-11-23 13:12:29,798 INFO L226 Difference]: Without dead ends: 61 [2021-11-23 13:12:29,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:12:29,800 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 40 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:29,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 38 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:12:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-23 13:12:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-23 13:12:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.553191489361702) internal successors, (73), 60 states have internal predecessors, (73), 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 13:12:29,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2021-11-23 13:12:29,810 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2021-11-23 13:12:29,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:29,811 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2021-11-23 13:12:29,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 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 13:12:29,811 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2021-11-23 13:12:29,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 13:12:29,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:29,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:29,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 13:12:29,812 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:29,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:29,813 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-11-23 13:12:29,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:29,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190394304] [2021-11-23 13:12:29,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:29,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:29,933 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 13:12:29,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:29,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190394304] [2021-11-23 13:12:29,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190394304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:29,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:29,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 13:12:29,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113508095] [2021-11-23 13:12:29,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:29,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 13:12:29,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:29,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 13:12:29,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 13:12:29,938 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 13:12:30,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:30,041 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2021-11-23 13:12:30,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:12:30,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2021-11-23 13:12:30,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:30,044 INFO L225 Difference]: With dead ends: 94 [2021-11-23 13:12:30,044 INFO L226 Difference]: Without dead ends: 94 [2021-11-23 13:12:30,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:12:30,050 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 82 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:30,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 88 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:12:30,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-23 13:12:30,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2021-11-23 13:12:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 62 states have internal predecessors, (76), 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 13:12:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2021-11-23 13:12:30,070 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 9 [2021-11-23 13:12:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:30,071 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2021-11-23 13:12:30,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 13:12:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2021-11-23 13:12:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 13:12:30,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:30,072 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:30,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 13:12:30,072 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:30,073 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-11-23 13:12:30,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:30,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192236723] [2021-11-23 13:12:30,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:30,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:30,157 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 13:12:30,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:30,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192236723] [2021-11-23 13:12:30,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192236723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:30,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:30,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:12:30,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126122573] [2021-11-23 13:12:30,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:30,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:12:30,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:30,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:12:30,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:12:30,161 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 13:12:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:30,201 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2021-11-23 13:12:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:12:30,201 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-23 13:12:30,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:30,202 INFO L225 Difference]: With dead ends: 62 [2021-11-23 13:12:30,202 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 13:12:30,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:12:30,204 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:30,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 37 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:12:30,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 13:12:30,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-23 13:12:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.530612244897959) internal successors, (75), 61 states have internal predecessors, (75), 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 13:12:30,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2021-11-23 13:12:30,209 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 10 [2021-11-23 13:12:30,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:30,210 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2021-11-23 13:12:30,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 13:12:30,210 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2021-11-23 13:12:30,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 13:12:30,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:30,215 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:30,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 13:12:30,217 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:30,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:30,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-11-23 13:12:30,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:30,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688966832] [2021-11-23 13:12:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:30,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:30,338 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 13:12:30,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:30,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688966832] [2021-11-23 13:12:30,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688966832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:12:30,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733822276] [2021-11-23 13:12:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:30,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:30,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:12:30,341 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:12:30,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 13:12:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:30,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 13:12:30,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:30,506 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 13:12:30,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 13:12:30,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:12:30,650 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 13:12:30,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:30,967 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 13:12:30,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733822276] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:12:30,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:12:30,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-23 13:12:30,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565480145] [2021-11-23 13:12:30,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:12:30,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:12:30,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:30,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:12:30,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:12:30,970 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 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 13:12:31,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:31,231 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2021-11-23 13:12:31,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:12:31,232 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 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 11 [2021-11-23 13:12:31,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:31,233 INFO L225 Difference]: With dead ends: 143 [2021-11-23 13:12:31,233 INFO L226 Difference]: Without dead ends: 143 [2021-11-23 13:12:31,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:12:31,237 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 235 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:31,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 256 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:12:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-23 13:12:31,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 57. [2021-11-23 13:12:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.488888888888889) internal successors, (67), 56 states have internal predecessors, (67), 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 13:12:31,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2021-11-23 13:12:31,247 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 11 [2021-11-23 13:12:31,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:31,247 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2021-11-23 13:12:31,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 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 13:12:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2021-11-23 13:12:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 13:12:31,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:31,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:31,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:31,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 13:12:31,450 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:31,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:31,450 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2021-11-23 13:12:31,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:31,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305325808] [2021-11-23 13:12:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:31,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:31,541 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 13:12:31,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:31,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305325808] [2021-11-23 13:12:31,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305325808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:31,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:31,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:12:31,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279091189] [2021-11-23 13:12:31,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:31,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:12:31,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:31,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:12:31,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:12:31,544 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 13:12:31,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:31,628 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-11-23 13:12:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:12:31,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 12 [2021-11-23 13:12:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:31,630 INFO L225 Difference]: With dead ends: 80 [2021-11-23 13:12:31,630 INFO L226 Difference]: Without dead ends: 80 [2021-11-23 13:12:31,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:12:31,631 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 159 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:31,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 66 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:12:31,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-23 13:12:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2021-11-23 13:12:31,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 66 states have internal predecessors, (86), 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 13:12:31,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-11-23 13:12:31,644 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 12 [2021-11-23 13:12:31,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:31,645 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-11-23 13:12:31,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 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 13:12:31,645 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-11-23 13:12:31,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 13:12:31,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:31,648 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:31,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 13:12:31,648 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:31,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:31,652 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2021-11-23 13:12:31,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:31,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527397530] [2021-11-23 13:12:31,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:31,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:31,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:31,706 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 13:12:31,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:31,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527397530] [2021-11-23 13:12:31,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527397530] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:31,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:31,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:12:31,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141730332] [2021-11-23 13:12:31,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:31,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:12:31,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:31,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:12:31,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:12:31,712 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 13:12:31,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:31,749 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2021-11-23 13:12:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:12:31,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12 [2021-11-23 13:12:31,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:31,751 INFO L225 Difference]: With dead ends: 65 [2021-11-23 13:12:31,752 INFO L226 Difference]: Without dead ends: 65 [2021-11-23 13:12:31,753 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 13:12:31,753 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:31,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 49 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:12:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-23 13:12:31,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-11-23 13:12:31,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.490909090909091) internal successors, (82), 64 states have internal predecessors, (82), 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 13:12:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2021-11-23 13:12:31,768 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 12 [2021-11-23 13:12:31,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:31,769 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2021-11-23 13:12:31,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 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 13:12:31,769 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2021-11-23 13:12:31,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 13:12:31,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:31,770 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:31,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 13:12:31,770 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:31,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-11-23 13:12:31,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:31,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174480746] [2021-11-23 13:12:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:31,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:31,868 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 13:12:31,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:31,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174480746] [2021-11-23 13:12:31,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174480746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:12:31,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703149792] [2021-11-23 13:12:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:31,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:31,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:12:31,874 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:12:31,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 13:12:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:31,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 13:12:31,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:31,957 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:12:31,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:12:32,065 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 13:12:32,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:32,337 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 13:12:32,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703149792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:12:32,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:12:32,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-11-23 13:12:32,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292135492] [2021-11-23 13:12:32,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:12:32,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 13:12:32,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:32,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 13:12:32,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-23 13:12:32,342 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 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 13:12:32,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:32,566 INFO L93 Difference]: Finished difference Result 139 states and 177 transitions. [2021-11-23 13:12:32,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:12:32,567 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 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 13:12:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:32,568 INFO L225 Difference]: With dead ends: 139 [2021-11-23 13:12:32,568 INFO L226 Difference]: Without dead ends: 139 [2021-11-23 13:12:32,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:12:32,569 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 226 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:32,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 214 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:12:32,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-23 13:12:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 62. [2021-11-23 13:12:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.471698113207547) internal successors, (78), 61 states have internal predecessors, (78), 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 13:12:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2021-11-23 13:12:32,573 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 13 [2021-11-23 13:12:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:32,573 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2021-11-23 13:12:32,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 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 13:12:32,574 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2021-11-23 13:12:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 13:12:32,575 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:32,575 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:32,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:32,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 13:12:32,800 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:32,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1062173030, now seen corresponding path program 1 times [2021-11-23 13:12:32,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:32,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565777288] [2021-11-23 13:12:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:32,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:32,852 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 13:12:32,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:32,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565777288] [2021-11-23 13:12:32,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565777288] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:32,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:32,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:12:32,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902948437] [2021-11-23 13:12:32,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:32,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:12:32,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:32,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:12:32,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:12:32,855 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 13:12:32,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:32,892 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2021-11-23 13:12:32,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:12:32,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 15 [2021-11-23 13:12:32,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:32,894 INFO L225 Difference]: With dead ends: 59 [2021-11-23 13:12:32,894 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 13:12:32,894 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 13:12:32,896 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:32,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 46 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:12:32,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 13:12:32,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-23 13:12:32,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 58 states have internal predecessors, (73), 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 13:12:32,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2021-11-23 13:12:32,901 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 15 [2021-11-23 13:12:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:32,903 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2021-11-23 13:12:32,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 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 13:12:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2021-11-23 13:12:32,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 13:12:32,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:32,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:32,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 13:12:32,906 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:32,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:32,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1062173031, now seen corresponding path program 1 times [2021-11-23 13:12:32,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:32,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582025891] [2021-11-23 13:12:32,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:32,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:33,014 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 13:12:33,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:33,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582025891] [2021-11-23 13:12:33,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582025891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:33,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:33,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 13:12:33,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729646828] [2021-11-23 13:12:33,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:33,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 13:12:33,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:33,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 13:12:33,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 13:12:33,020 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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 13:12:33,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:33,072 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2021-11-23 13:12:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 13:12:33,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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 15 [2021-11-23 13:12:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:33,074 INFO L225 Difference]: With dead ends: 75 [2021-11-23 13:12:33,074 INFO L226 Difference]: Without dead ends: 75 [2021-11-23 13:12:33,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 13:12:33,075 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 122 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:33,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 58 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:12:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-23 13:12:33,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 68. [2021-11-23 13:12:33,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.3548387096774193) internal successors, (84), 67 states have internal predecessors, (84), 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 13:12:33,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-11-23 13:12:33,078 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 15 [2021-11-23 13:12:33,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:33,078 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-11-23 13:12:33,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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 13:12:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2021-11-23 13:12:33,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 13:12:33,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:33,080 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:33,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 13:12:33,080 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:33,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:33,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1184642481, now seen corresponding path program 1 times [2021-11-23 13:12:33,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:33,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487754426] [2021-11-23 13:12:33,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:33,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:33,145 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 13:12:33,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:33,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487754426] [2021-11-23 13:12:33,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487754426] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:33,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:33,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:12:33,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991661824] [2021-11-23 13:12:33,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:33,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 13:12:33,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:33,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 13:12:33,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 13:12:33,148 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 13:12:33,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:33,170 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2021-11-23 13:12:33,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 13:12:33,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 19 [2021-11-23 13:12:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:33,171 INFO L225 Difference]: With dead ends: 67 [2021-11-23 13:12:33,172 INFO L226 Difference]: Without dead ends: 63 [2021-11-23 13:12:33,172 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 [2021-11-23 13:12:33,173 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:33,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:12:33,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-23 13:12:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-11-23 13:12:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.3275862068965518) internal successors, (77), 62 states have internal predecessors, (77), 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 13:12:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-11-23 13:12:33,176 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 19 [2021-11-23 13:12:33,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:33,176 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-11-23 13:12:33,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 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 13:12:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-11-23 13:12:33,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 13:12:33,177 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:33,178 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] [2021-11-23 13:12:33,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 13:12:33,178 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:33,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:33,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1972717743, now seen corresponding path program 1 times [2021-11-23 13:12:33,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:33,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887278229] [2021-11-23 13:12:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:33,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:33,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:33,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:33,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887278229] [2021-11-23 13:12:33,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887278229] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:33,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:33,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 13:12:33,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080738176] [2021-11-23 13:12:33,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:33,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 13:12:33,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:33,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 13:12:33,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:12:33,203 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 13:12:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:33,210 INFO L93 Difference]: Finished difference Result 66 states and 79 transitions. [2021-11-23 13:12:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 13:12:33,211 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2021-11-23 13:12:33,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:33,213 INFO L225 Difference]: With dead ends: 66 [2021-11-23 13:12:33,213 INFO L226 Difference]: Without dead ends: 65 [2021-11-23 13:12:33,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 13:12:33,214 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:33,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:12:33,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-23 13:12:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-11-23 13:12:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.305084745762712) internal successors, (77), 63 states have internal predecessors, (77), 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 13:12:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2021-11-23 13:12:33,218 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 20 [2021-11-23 13:12:33,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:33,219 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2021-11-23 13:12:33,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 13:12:33,219 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2021-11-23 13:12:33,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 13:12:33,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:33,220 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] [2021-11-23 13:12:33,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 13:12:33,220 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:33,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1849790580, now seen corresponding path program 1 times [2021-11-23 13:12:33,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:33,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406684972] [2021-11-23 13:12:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:33,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:33,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:33,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406684972] [2021-11-23 13:12:33,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406684972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:33,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:33,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 13:12:33,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147621623] [2021-11-23 13:12:33,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:33,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:12:33,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:33,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:12:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 13:12:33,363 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 13:12:33,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:33,515 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2021-11-23 13:12:33,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:12:33,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 22 [2021-11-23 13:12:33,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:33,517 INFO L225 Difference]: With dead ends: 77 [2021-11-23 13:12:33,517 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 13:12:33,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:12:33,518 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 19 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:33,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 189 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:12:33,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 13:12:33,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-23 13:12:33,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 58 states have internal predecessors, (70), 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 13:12:33,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2021-11-23 13:12:33,521 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 22 [2021-11-23 13:12:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:33,522 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2021-11-23 13:12:33,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 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 13:12:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2021-11-23 13:12:33,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 13:12:33,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:33,523 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] [2021-11-23 13:12:33,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 13:12:33,523 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:33,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1627528266, now seen corresponding path program 1 times [2021-11-23 13:12:33,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:33,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958097284] [2021-11-23 13:12:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:33,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:33,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:33,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958097284] [2021-11-23 13:12:33,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958097284] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:33,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:33,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 13:12:33,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996829568] [2021-11-23 13:12:33,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:33,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:12:33,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:33,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:12:33,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:12:33,751 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 13:12:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:33,914 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-11-23 13:12:33,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:12:33,915 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 22 [2021-11-23 13:12:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:33,916 INFO L225 Difference]: With dead ends: 80 [2021-11-23 13:12:33,916 INFO L226 Difference]: Without dead ends: 67 [2021-11-23 13:12:33,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:12:33,917 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 76 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:33,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 140 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:12:33,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-23 13:12:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-11-23 13:12:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 60 states have internal predecessors, (72), 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 13:12:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-11-23 13:12:33,922 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 22 [2021-11-23 13:12:33,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:33,924 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-11-23 13:12:33,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 13:12:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-11-23 13:12:33,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 13:12:33,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:33,927 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] [2021-11-23 13:12:33,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 13:12:33,928 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:33,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:33,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1399878823, now seen corresponding path program 1 times [2021-11-23 13:12:33,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:33,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029182667] [2021-11-23 13:12:33,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:33,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:34,059 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 13:12:34,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:34,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029182667] [2021-11-23 13:12:34,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029182667] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:12:34,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337561314] [2021-11-23 13:12:34,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:34,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:34,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:12:34,064 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:12:34,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 13:12:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:34,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 13:12:34,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:34,234 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 [2021-11-23 13:12:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:34,348 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 13:12:34,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337561314] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:34,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 13:12:34,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2021-11-23 13:12:34,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286755379] [2021-11-23 13:12:34,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:34,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 13:12:34,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:34,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 13:12:34,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-11-23 13:12:34,350 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 13:12:34,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:34,479 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-11-23 13:12:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:12:34,479 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 26 [2021-11-23 13:12:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:34,480 INFO L225 Difference]: With dead ends: 70 [2021-11-23 13:12:34,480 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 13:12:34,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-11-23 13:12:34,481 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:34,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 177 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:12:34,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 13:12:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-11-23 13:12:34,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 52 states have internal predecessors, (62), 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 13:12:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-11-23 13:12:34,484 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 26 [2021-11-23 13:12:34,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:34,484 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-11-23 13:12:34,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 13:12:34,485 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-11-23 13:12:34,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 13:12:34,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:34,485 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] [2021-11-23 13:12:34,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:34,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:34,697 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:34,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:34,698 INFO L85 PathProgramCache]: Analyzing trace with hash -405559511, now seen corresponding path program 1 times [2021-11-23 13:12:34,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:34,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625401426] [2021-11-23 13:12:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:34,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:34,796 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 13:12:34,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:34,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625401426] [2021-11-23 13:12:34,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625401426] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:12:34,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125695593] [2021-11-23 13:12:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:34,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:34,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:12:34,799 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:12:34,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 13:12:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:34,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 13:12:34,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:34,931 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 13:12:34,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-23 13:12:34,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:12:35,105 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 13:12:35,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:35,341 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 13:12:35,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125695593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:12:35,342 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:12:35,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2021-11-23 13:12:35,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593612909] [2021-11-23 13:12:35,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:12:35,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 13:12:35,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:35,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 13:12:35,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-11-23 13:12:35,349 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 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 13:12:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:35,578 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-11-23 13:12:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 13:12:35,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 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 26 [2021-11-23 13:12:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:35,580 INFO L225 Difference]: With dead ends: 77 [2021-11-23 13:12:35,580 INFO L226 Difference]: Without dead ends: 77 [2021-11-23 13:12:35,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2021-11-23 13:12:35,581 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 383 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:35,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 105 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:12:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-23 13:12:35,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2021-11-23 13:12:35,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.26) internal successors, (63), 53 states have internal predecessors, (63), 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 13:12:35,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-11-23 13:12:35,584 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 26 [2021-11-23 13:12:35,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:35,584 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-11-23 13:12:35,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.9375) internal successors, (63), 17 states have internal predecessors, (63), 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 13:12:35,585 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-11-23 13:12:35,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 13:12:35,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:35,585 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:35,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 13:12:35,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-23 13:12:35,796 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:35,796 INFO L85 PathProgramCache]: Analyzing trace with hash -280383491, now seen corresponding path program 1 times [2021-11-23 13:12:35,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:35,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074130227] [2021-11-23 13:12:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:35,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:35,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:35,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074130227] [2021-11-23 13:12:35,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074130227] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:35,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:35,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-23 13:12:35,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415966210] [2021-11-23 13:12:35,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:35,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 13:12:35,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:35,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 13:12:35,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-11-23 13:12:35,978 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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 13:12:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:36,334 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2021-11-23 13:12:36,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 13:12:36,335 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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 29 [2021-11-23 13:12:36,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:36,335 INFO L225 Difference]: With dead ends: 99 [2021-11-23 13:12:36,335 INFO L226 Difference]: Without dead ends: 99 [2021-11-23 13:12:36,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-11-23 13:12:36,336 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 183 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:36,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 165 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:12:36,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-23 13:12:36,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 67. [2021-11-23 13:12:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 66 states have internal predecessors, (77), 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 13:12:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-11-23 13:12:36,339 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 29 [2021-11-23 13:12:36,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:36,339 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-11-23 13:12:36,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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 13:12:36,340 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-11-23 13:12:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 13:12:36,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:36,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:36,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 13:12:36,340 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:36,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:36,341 INFO L85 PathProgramCache]: Analyzing trace with hash -223125189, now seen corresponding path program 1 times [2021-11-23 13:12:36,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:36,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507639077] [2021-11-23 13:12:36,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:36,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:36,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:36,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507639077] [2021-11-23 13:12:36,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507639077] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 13:12:36,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 13:12:36,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 13:12:36,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684143905] [2021-11-23 13:12:36,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 13:12:36,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 13:12:36,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:36,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 13:12:36,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-23 13:12:36,477 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 13:12:36,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:36,616 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2021-11-23 13:12:36,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 13:12:36,618 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 29 [2021-11-23 13:12:36,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:36,619 INFO L225 Difference]: With dead ends: 67 [2021-11-23 13:12:36,619 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 13:12:36,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-23 13:12:36,620 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:36,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 162 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:12:36,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 13:12:36,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2021-11-23 13:12:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 54 states have internal predecessors, (64), 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 13:12:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-11-23 13:12:36,623 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 29 [2021-11-23 13:12:36,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:36,623 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-11-23 13:12:36,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 13:12:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-11-23 13:12:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 13:12:36,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:36,624 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:36,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 13:12:36,624 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:36,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1068910272, now seen corresponding path program 1 times [2021-11-23 13:12:36,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:36,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707153435] [2021-11-23 13:12:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:36,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:36,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:36,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707153435] [2021-11-23 13:12:36,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707153435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:12:36,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075564640] [2021-11-23 13:12:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:36,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:36,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:12:36,747 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:12:36,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 13:12:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:36,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 13:12:36,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:36,846 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:12:36,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:12:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:37,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:37,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075564640] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:12:37,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:12:37,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2021-11-23 13:12:37,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800551286] [2021-11-23 13:12:37,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:12:37,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 13:12:37,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:37,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 13:12:37,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:12:37,368 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 20 states have internal predecessors, (86), 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 13:12:37,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:37,576 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2021-11-23 13:12:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 13:12:37,576 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 20 states have internal predecessors, (86), 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 33 [2021-11-23 13:12:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:37,577 INFO L225 Difference]: With dead ends: 84 [2021-11-23 13:12:37,577 INFO L226 Difference]: Without dead ends: 81 [2021-11-23 13:12:37,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-11-23 13:12:37,578 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 141 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:37,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 144 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:12:37,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-23 13:12:37,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 65. [2021-11-23 13:12:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 64 states have internal predecessors, (72), 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 13:12:37,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-11-23 13:12:37,581 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 33 [2021-11-23 13:12:37,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:37,581 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-11-23 13:12:37,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.526315789473684) internal successors, (86), 20 states have internal predecessors, (86), 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 13:12:37,582 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-11-23 13:12:37,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 13:12:37,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:37,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:37,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 13:12:37,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:37,791 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:37,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1533958547, now seen corresponding path program 1 times [2021-11-23 13:12:37,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:37,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035479725] [2021-11-23 13:12:37,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:37,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:38,155 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:38,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:38,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035479725] [2021-11-23 13:12:38,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035479725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:12:38,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386545924] [2021-11-23 13:12:38,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:38,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:38,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:12:38,160 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:12:38,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 13:12:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:38,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 13:12:38,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:38,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:12:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:39,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:40,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 13:12:40,327 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 13:12:40,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 45 [2021-11-23 13:12:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:40,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386545924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:12:40,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:12:40,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17, 19] total 42 [2021-11-23 13:12:40,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371790797] [2021-11-23 13:12:40,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:12:40,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 13:12:40,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:40,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 13:12:40,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 13:12:40,693 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 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 13:12:41,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:41,835 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2021-11-23 13:12:41,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-23 13:12:41,836 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 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 40 [2021-11-23 13:12:41,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:41,837 INFO L225 Difference]: With dead ends: 143 [2021-11-23 13:12:41,837 INFO L226 Difference]: Without dead ends: 128 [2021-11-23 13:12:41,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=471, Invalid=3951, Unknown=0, NotChecked=0, Total=4422 [2021-11-23 13:12:41,840 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 96 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:41,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 324 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 319 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2021-11-23 13:12:41,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-23 13:12:41,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 91. [2021-11-23 13:12:41,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 90 states have internal predecessors, (101), 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 13:12:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2021-11-23 13:12:41,845 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 40 [2021-11-23 13:12:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:41,845 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2021-11-23 13:12:41,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 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 13:12:41,846 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2021-11-23 13:12:41,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 13:12:41,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:41,846 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:41,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:42,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:42,060 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:42,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1314019055, now seen corresponding path program 1 times [2021-11-23 13:12:42,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:42,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728201557] [2021-11-23 13:12:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:42,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:42,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:42,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728201557] [2021-11-23 13:12:42,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728201557] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:12:42,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686726289] [2021-11-23 13:12:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:42,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:42,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:12:42,365 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:12:42,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 13:12:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:42,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 13:12:42,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:42,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:12:43,905 INFO L354 Elim1Store]: treesize reduction 45, result has 40.8 percent of original size [2021-11-23 13:12:43,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 65 [2021-11-23 13:12:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:43,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:44,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:12:44,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 108 [2021-11-23 13:12:44,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 13:12:44,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2021-11-23 13:12:45,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:45,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686726289] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:12:45,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:12:45,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 46 [2021-11-23 13:12:45,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069831720] [2021-11-23 13:12:45,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:12:45,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 13:12:45,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:45,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 13:12:45,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1872, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 13:12:45,012 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 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 13:12:46,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:46,245 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-11-23 13:12:46,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 13:12:46,246 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 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 43 [2021-11-23 13:12:46,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:46,247 INFO L225 Difference]: With dead ends: 133 [2021-11-23 13:12:46,247 INFO L226 Difference]: Without dead ends: 133 [2021-11-23 13:12:46,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=561, Invalid=4841, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 13:12:46,250 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 93 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:46,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 298 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 142 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2021-11-23 13:12:46,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-23 13:12:46,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 122. [2021-11-23 13:12:46,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 119 states have (on average 1.134453781512605) internal successors, (135), 121 states have internal predecessors, (135), 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 13:12:46,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2021-11-23 13:12:46,258 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 43 [2021-11-23 13:12:46,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:46,258 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2021-11-23 13:12:46,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 46 states have internal predecessors, (105), 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 13:12:46,269 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2021-11-23 13:12:46,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-23 13:12:46,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:46,270 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:46,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:46,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 13:12:46,486 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:46,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:46,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1256760753, now seen corresponding path program 1 times [2021-11-23 13:12:46,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:46,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129915155] [2021-11-23 13:12:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:46,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:46,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:46,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129915155] [2021-11-23 13:12:46,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129915155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:12:46,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728715279] [2021-11-23 13:12:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:46,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:46,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:12:46,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:12:46,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 13:12:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:46,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 13:12:46,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:46,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:12:47,200 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-11-23 13:12:47,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2021-11-23 13:12:47,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:47,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:47,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:12:47,383 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 26 treesize of output 22 [2021-11-23 13:12:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:47,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728715279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:12:47,524 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:12:47,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 26 [2021-11-23 13:12:47,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457630917] [2021-11-23 13:12:47,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:12:47,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 13:12:47,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:47,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 13:12:47,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-11-23 13:12:47,527 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 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 13:12:47,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:47,912 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2021-11-23 13:12:47,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 13:12:47,912 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 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) Word has length 43 [2021-11-23 13:12:47,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:47,913 INFO L225 Difference]: With dead ends: 120 [2021-11-23 13:12:47,913 INFO L226 Difference]: Without dead ends: 101 [2021-11-23 13:12:47,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:12:47,915 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 166 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:47,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 284 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 181 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-11-23 13:12:47,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-23 13:12:47,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2021-11-23 13:12:47,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 92 states have (on average 1.1304347826086956) internal successors, (104), 94 states have internal predecessors, (104), 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 13:12:47,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2021-11-23 13:12:47,919 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 43 [2021-11-23 13:12:47,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:47,919 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2021-11-23 13:12:47,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.6538461538461537) internal successors, (95), 26 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 13:12:47,920 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2021-11-23 13:12:47,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 13:12:47,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:47,921 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:47,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:48,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 13:12:48,148 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:48,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:48,148 INFO L85 PathProgramCache]: Analyzing trace with hash -36257516, now seen corresponding path program 2 times [2021-11-23 13:12:48,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:48,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194835212] [2021-11-23 13:12:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:48,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:48,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:48,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194835212] [2021-11-23 13:12:48,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194835212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:12:48,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160713476] [2021-11-23 13:12:48,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:12:48,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:48,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:12:48,296 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:12:48,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 13:12:48,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:12:48,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:12:48,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 13:12:48,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:48,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:48,820 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 5 treesize of output 3 [2021-11-23 13:12:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:48,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160713476] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:12:48,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:12:48,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-11-23 13:12:48,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871103189] [2021-11-23 13:12:48,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:12:48,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 13:12:48,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:48,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 13:12:48,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-11-23 13:12:48,867 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 21 states, 20 states have (on average 5.1) internal successors, (102), 21 states have internal predecessors, (102), 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 13:12:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:49,051 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2021-11-23 13:12:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 13:12:49,051 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.1) internal successors, (102), 21 states have internal predecessors, (102), 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 47 [2021-11-23 13:12:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:49,052 INFO L225 Difference]: With dead ends: 133 [2021-11-23 13:12:49,052 INFO L226 Difference]: Without dead ends: 131 [2021-11-23 13:12:49,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2021-11-23 13:12:49,053 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 371 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:49,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 190 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 13:12:49,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-23 13:12:49,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2021-11-23 13:12:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 114 states have (on average 1.131578947368421) internal successors, (129), 116 states have internal predecessors, (129), 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 13:12:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2021-11-23 13:12:49,058 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 47 [2021-11-23 13:12:49,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:49,058 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2021-11-23 13:12:49,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.1) internal successors, (102), 21 states have internal predecessors, (102), 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 13:12:49,058 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2021-11-23 13:12:49,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 13:12:49,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:49,059 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:49,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:49,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 13:12:49,259 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:49,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:49,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1788924915, now seen corresponding path program 2 times [2021-11-23 13:12:49,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:49,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950620395] [2021-11-23 13:12:49,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:49,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:49,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:12:49,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:49,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950620395] [2021-11-23 13:12:49,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950620395] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:12:49,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680359857] [2021-11-23 13:12:49,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:12:49,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:49,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:12:49,374 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:12:49,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 13:12:49,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:12:49,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:12:49,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 13:12:49,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:12:49,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:49,873 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 5 treesize of output 3 [2021-11-23 13:12:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:12:49,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680359857] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:12:49,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:12:49,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2021-11-23 13:12:49,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691089871] [2021-11-23 13:12:49,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:12:49,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 13:12:49,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:49,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 13:12:49,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-11-23 13:12:49,925 INFO L87 Difference]: Start difference. First operand 117 states and 129 transitions. Second operand has 20 states, 19 states have (on average 5.052631578947368) internal successors, (96), 20 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 13:12:50,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:50,194 INFO L93 Difference]: Finished difference Result 203 states and 219 transitions. [2021-11-23 13:12:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 13:12:50,195 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 5.052631578947368) internal successors, (96), 20 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) Word has length 48 [2021-11-23 13:12:50,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:50,196 INFO L225 Difference]: With dead ends: 203 [2021-11-23 13:12:50,196 INFO L226 Difference]: Without dead ends: 203 [2021-11-23 13:12:50,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2021-11-23 13:12:50,197 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 274 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:50,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 310 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:12:50,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-23 13:12:50,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 130. [2021-11-23 13:12:50,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 129 states have internal predecessors, (144), 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 13:12:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2021-11-23 13:12:50,202 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 48 [2021-11-23 13:12:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:50,202 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2021-11-23 13:12:50,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 5.052631578947368) internal successors, (96), 20 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 13:12:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2021-11-23 13:12:50,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 13:12:50,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:50,203 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:50,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:50,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 13:12:50,416 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:50,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:50,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1676974911, now seen corresponding path program 1 times [2021-11-23 13:12:50,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:50,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087717136] [2021-11-23 13:12:50,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:50,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:12:51,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:51,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087717136] [2021-11-23 13:12:51,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087717136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:12:51,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072498273] [2021-11-23 13:12:51,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:51,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:51,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:12:51,045 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:12:51,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 13:12:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:51,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 13:12:51,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:51,133 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:12:51,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:12:51,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 13:12:51,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-11-23 13:12:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:51,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:12:52,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-23 13:12:52,368 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 30 treesize of output 28 [2021-11-23 13:12:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:12:52,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072498273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:12:52,998 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:12:52,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14, 16] total 45 [2021-11-23 13:12:52,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565715574] [2021-11-23 13:12:52,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:12:53,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-23 13:12:53,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:12:53,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-23 13:12:53,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1823, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 13:12:53,002 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 45 states have internal predecessors, (148), 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 13:12:55,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:12:55,397 INFO L93 Difference]: Finished difference Result 283 states and 303 transitions. [2021-11-23 13:12:55,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-23 13:12:55,398 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 45 states have internal predecessors, (148), 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 54 [2021-11-23 13:12:55,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:12:55,399 INFO L225 Difference]: With dead ends: 283 [2021-11-23 13:12:55,399 INFO L226 Difference]: Without dead ends: 194 [2021-11-23 13:12:55,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1185 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=865, Invalid=4685, Unknown=0, NotChecked=0, Total=5550 [2021-11-23 13:12:55,402 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 603 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:12:55,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 536 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 854 Invalid, 0 Unknown, 174 Unchecked, 0.6s Time] [2021-11-23 13:12:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-23 13:12:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 138. [2021-11-23 13:12:55,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 135 states have (on average 1.125925925925926) internal successors, (152), 137 states have internal predecessors, (152), 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 13:12:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2021-11-23 13:12:55,408 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 54 [2021-11-23 13:12:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:12:55,408 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2021-11-23 13:12:55,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2888888888888888) internal successors, (148), 45 states have internal predecessors, (148), 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 13:12:55,409 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2021-11-23 13:12:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 13:12:55,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:12:55,410 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:12:55,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 13:12:55,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 13:12:55,623 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:12:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:12:55,624 INFO L85 PathProgramCache]: Analyzing trace with hash -759073956, now seen corresponding path program 2 times [2021-11-23 13:12:55,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:12:55,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297445852] [2021-11-23 13:12:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:12:55,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:12:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:12:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 13:12:55,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:12:55,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297445852] [2021-11-23 13:12:55,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297445852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:12:55,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286364914] [2021-11-23 13:12:55,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:12:55,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:12:55,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:12:55,900 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:12:55,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 13:12:55,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:12:55,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:12:55,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-23 13:12:55,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:12:55,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 13:12:56,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 13:12:56,217 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-23 13:12:56,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2021-11-23 13:12:56,963 INFO L354 Elim1Store]: treesize reduction 20, result has 53.5 percent of original size [2021-11-23 13:12:56,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 43 [2021-11-23 13:12:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 13:12:56,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:00,075 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-23 13:13:00,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 412 treesize of output 368 [2021-11-23 13:13:00,396 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 13:13:00,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286364914] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:13:00,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:13:00,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 16] total 36 [2021-11-23 13:13:00,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369766672] [2021-11-23 13:13:00,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:13:00,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 13:13:00,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:13:00,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 13:13:00,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1132, Unknown=1, NotChecked=0, Total=1260 [2021-11-23 13:13:00,399 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand has 36 states, 36 states have (on average 3.0) internal successors, (108), 36 states have internal predecessors, (108), 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 13:13:01,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:01,499 INFO L93 Difference]: Finished difference Result 178 states and 193 transitions. [2021-11-23 13:13:01,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 13:13:01,499 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0) internal successors, (108), 36 states have internal predecessors, (108), 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 58 [2021-11-23 13:13:01,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:01,501 INFO L225 Difference]: With dead ends: 178 [2021-11-23 13:13:01,501 INFO L226 Difference]: Without dead ends: 174 [2021-11-23 13:13:01,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=174, Invalid=1465, Unknown=1, NotChecked=0, Total=1640 [2021-11-23 13:13:01,503 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 57 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:01,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 400 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 0 Unknown, 101 Unchecked, 0.1s Time] [2021-11-23 13:13:01,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-23 13:13:01,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 167. [2021-11-23 13:13:01,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 164 states have (on average 1.1219512195121952) internal successors, (184), 166 states have internal predecessors, (184), 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 13:13:01,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 184 transitions. [2021-11-23 13:13:01,509 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 184 transitions. Word has length 58 [2021-11-23 13:13:01,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:01,509 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 184 transitions. [2021-11-23 13:13:01,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0) internal successors, (108), 36 states have internal predecessors, (108), 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 13:13:01,510 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 184 transitions. [2021-11-23 13:13:01,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 13:13:01,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:01,511 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:01,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:01,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:01,723 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:13:01,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:01,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1533214746, now seen corresponding path program 2 times [2021-11-23 13:13:01,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:13:01,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265865487] [2021-11-23 13:13:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:01,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:13:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:01,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:13:01,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265865487] [2021-11-23 13:13:01,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265865487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:13:01,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923820827] [2021-11-23 13:13:01,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:13:01,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:01,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:13:01,928 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:13:01,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 13:13:01,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:13:01,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:13:01,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 13:13:02,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:02,019 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:13:02,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:13:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:02,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:02,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923820827] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:13:02,937 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:13:02,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2021-11-23 13:13:02,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283529701] [2021-11-23 13:13:02,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:13:02,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 13:13:02,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:13:02,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 13:13:02,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2021-11-23 13:13:02,940 INFO L87 Difference]: Start difference. First operand 167 states and 184 transitions. Second operand has 31 states, 30 states have (on average 5.666666666666667) internal successors, (170), 31 states have internal predecessors, (170), 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 13:13:03,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:03,219 INFO L93 Difference]: Finished difference Result 242 states and 270 transitions. [2021-11-23 13:13:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 13:13:03,220 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 5.666666666666667) internal successors, (170), 31 states have internal predecessors, (170), 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 61 [2021-11-23 13:13:03,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:03,221 INFO L225 Difference]: With dead ends: 242 [2021-11-23 13:13:03,221 INFO L226 Difference]: Without dead ends: 236 [2021-11-23 13:13:03,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=1052, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:13:03,223 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 448 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:03,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 290 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:13:03,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-23 13:13:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 209. [2021-11-23 13:13:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 206 states have (on average 1.116504854368932) internal successors, (230), 208 states have internal predecessors, (230), 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 13:13:03,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 230 transitions. [2021-11-23 13:13:03,231 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 230 transitions. Word has length 61 [2021-11-23 13:13:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:03,231 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 230 transitions. [2021-11-23 13:13:03,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 5.666666666666667) internal successors, (170), 31 states have internal predecessors, (170), 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 13:13:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 230 transitions. [2021-11-23 13:13:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 13:13:03,232 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:03,233 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:03,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:03,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-23 13:13:03,446 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:13:03,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:03,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1254400585, now seen corresponding path program 3 times [2021-11-23 13:13:03,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:13:03,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239428523] [2021-11-23 13:13:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:03,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:13:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 13:13:03,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:13:03,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239428523] [2021-11-23 13:13:03,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239428523] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:13:03,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442672834] [2021-11-23 13:13:03,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:13:03,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:03,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:13:03,852 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:13:03,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 13:13:03,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 13:13:03,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:13:03,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-23 13:13:03,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:03,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 13:13:04,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:13:04,361 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 13:13:04,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2021-11-23 13:13:05,045 INFO L354 Elim1Store]: treesize reduction 20, result has 51.2 percent of original size [2021-11-23 13:13:05,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2021-11-23 13:13:05,083 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:05,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:08,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:13:08,429 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 26 treesize of output 22 [2021-11-23 13:13:08,647 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 13:13:08,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442672834] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:13:08,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:13:08,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 16] total 38 [2021-11-23 13:13:08,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647940893] [2021-11-23 13:13:08,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:13:08,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-23 13:13:08,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:13:08,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-23 13:13:08,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1280, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 13:13:08,650 INFO L87 Difference]: Start difference. First operand 209 states and 230 transitions. Second operand has 38 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 38 states have internal predecessors, (139), 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 13:13:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:09,274 INFO L93 Difference]: Finished difference Result 335 states and 363 transitions. [2021-11-23 13:13:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 13:13:09,275 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 38 states have internal predecessors, (139), 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 62 [2021-11-23 13:13:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:09,277 INFO L225 Difference]: With dead ends: 335 [2021-11-23 13:13:09,277 INFO L226 Difference]: Without dead ends: 327 [2021-11-23 13:13:09,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 96 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=219, Invalid=2231, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 13:13:09,279 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 76 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:09,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 1050 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 466 Invalid, 0 Unknown, 324 Unchecked, 0.2s Time] [2021-11-23 13:13:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-23 13:13:09,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 274. [2021-11-23 13:13:09,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 271 states have (on average 1.118081180811808) internal successors, (303), 273 states have internal predecessors, (303), 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 13:13:09,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 303 transitions. [2021-11-23 13:13:09,292 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 303 transitions. Word has length 62 [2021-11-23 13:13:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:09,292 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 303 transitions. [2021-11-23 13:13:09,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 38 states have internal predecessors, (139), 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 13:13:09,293 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 303 transitions. [2021-11-23 13:13:09,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 13:13:09,296 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:09,296 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:09,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:09,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:09,510 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:13:09,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:09,510 INFO L85 PathProgramCache]: Analyzing trace with hash 206881812, now seen corresponding path program 4 times [2021-11-23 13:13:09,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:13:09,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421863781] [2021-11-23 13:13:09,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:09,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:13:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:09,669 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 13:13:09,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:13:09,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421863781] [2021-11-23 13:13:09,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421863781] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:13:09,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604945182] [2021-11-23 13:13:09,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:13:09,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:09,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:13:09,688 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:13:09,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 13:13:09,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:13:09,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:13:09,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 13:13:09,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:09,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-23 13:13:09,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-11-23 13:13:10,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 13:13:10,168 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-23 13:13:10,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-11-23 13:13:11,035 INFO L354 Elim1Store]: treesize reduction 43, result has 55.2 percent of original size [2021-11-23 13:13:11,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 73 [2021-11-23 13:13:11,136 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 13:13:11,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:17,014 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-23 13:13:17,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 404 treesize of output 368 [2021-11-23 13:13:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 13:13:17,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604945182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:13:17,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:13:17,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15, 15] total 37 [2021-11-23 13:13:17,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889764654] [2021-11-23 13:13:17,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:13:17,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-23 13:13:17,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:13:17,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-23 13:13:17,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1210, Unknown=2, NotChecked=0, Total=1406 [2021-11-23 13:13:17,469 INFO L87 Difference]: Start difference. First operand 274 states and 303 transitions. Second operand has 38 states, 37 states have (on average 4.0) internal successors, (148), 38 states have internal predecessors, (148), 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 13:13:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:21,219 INFO L93 Difference]: Finished difference Result 392 states and 436 transitions. [2021-11-23 13:13:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-23 13:13:21,219 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.0) internal successors, (148), 38 states have internal predecessors, (148), 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 66 [2021-11-23 13:13:21,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:21,224 INFO L225 Difference]: With dead ends: 392 [2021-11-23 13:13:21,224 INFO L226 Difference]: Without dead ends: 392 [2021-11-23 13:13:21,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 113 SyntacticMatches, 11 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=831, Invalid=4423, Unknown=2, NotChecked=0, Total=5256 [2021-11-23 13:13:21,227 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 143 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:21,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 760 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 202 Invalid, 0 Unknown, 135 Unchecked, 0.1s Time] [2021-11-23 13:13:21,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-23 13:13:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 209. [2021-11-23 13:13:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.1014492753623188) internal successors, (228), 208 states have internal predecessors, (228), 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 13:13:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 228 transitions. [2021-11-23 13:13:21,242 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 228 transitions. Word has length 66 [2021-11-23 13:13:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:21,242 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 228 transitions. [2021-11-23 13:13:21,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.0) internal successors, (148), 38 states have internal predecessors, (148), 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 13:13:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 228 transitions. [2021-11-23 13:13:21,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 13:13:21,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:21,244 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:21,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:21,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-23 13:13:21,459 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:13:21,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:21,460 INFO L85 PathProgramCache]: Analyzing trace with hash -541897289, now seen corresponding path program 3 times [2021-11-23 13:13:21,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:13:21,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080563943] [2021-11-23 13:13:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:21,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:13:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:21,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:13:21,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080563943] [2021-11-23 13:13:21,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080563943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:13:21,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412935104] [2021-11-23 13:13:21,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:13:21,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:21,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:13:21,695 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:13:21,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 13:13:21,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-23 13:13:21,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:13:21,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 13:13:21,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:21,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:13:22,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 13:13:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:22,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:22,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:13:22,225 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 26 treesize of output 22 [2021-11-23 13:13:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:22,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412935104] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:13:22,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:13:22,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 28 [2021-11-23 13:13:22,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170151034] [2021-11-23 13:13:22,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:13:22,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 13:13:22,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:13:22,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 13:13:22,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2021-11-23 13:13:22,346 INFO L87 Difference]: Start difference. First operand 209 states and 228 transitions. Second operand has 28 states, 28 states have (on average 4.321428571428571) internal successors, (121), 28 states have internal predecessors, (121), 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 13:13:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:22,822 INFO L93 Difference]: Finished difference Result 347 states and 372 transitions. [2021-11-23 13:13:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 13:13:22,822 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.321428571428571) internal successors, (121), 28 states have internal predecessors, (121), 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 71 [2021-11-23 13:13:22,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:22,823 INFO L225 Difference]: With dead ends: 347 [2021-11-23 13:13:22,824 INFO L226 Difference]: Without dead ends: 230 [2021-11-23 13:13:22,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 127 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 13:13:22,825 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 248 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:22,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 573 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 523 Invalid, 0 Unknown, 28 Unchecked, 0.2s Time] [2021-11-23 13:13:22,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-23 13:13:22,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2021-11-23 13:13:22,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 219 states have (on average 1.095890410958904) internal successors, (240), 220 states have internal predecessors, (240), 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 13:13:22,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 240 transitions. [2021-11-23 13:13:22,832 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 240 transitions. Word has length 71 [2021-11-23 13:13:22,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:22,832 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 240 transitions. [2021-11-23 13:13:22,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.321428571428571) internal successors, (121), 28 states have internal predecessors, (121), 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 13:13:22,832 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 240 transitions. [2021-11-23 13:13:22,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 13:13:22,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:22,834 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:22,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:23,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-23 13:13:23,060 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:13:23,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:23,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1112009926, now seen corresponding path program 4 times [2021-11-23 13:13:23,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:13:23,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575225655] [2021-11-23 13:13:23,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:23,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:13:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:23,259 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 6 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:23,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:13:23,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575225655] [2021-11-23 13:13:23,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575225655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:13:23,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550010461] [2021-11-23 13:13:23,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:13:23,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:23,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:13:23,263 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:13:23,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 13:13:23,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:13:23,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:13:23,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 13:13:23,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:23,365 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:13:23,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:13:23,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 13:13:24,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:13:24,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-11-23 13:13:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 18 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:24,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:24,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 13:13:24,754 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 39 treesize of output 35 [2021-11-23 13:13:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 28 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:25,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550010461] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:13:25,513 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:13:25,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 41 [2021-11-23 13:13:25,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473814180] [2021-11-23 13:13:25,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:13:25,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 13:13:25,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:13:25,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 13:13:25,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1504, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 13:13:25,515 INFO L87 Difference]: Start difference. First operand 221 states and 240 transitions. Second operand has 42 states, 41 states have (on average 4.951219512195122) internal successors, (203), 42 states have internal predecessors, (203), 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 13:13:26,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:26,537 INFO L93 Difference]: Finished difference Result 312 states and 344 transitions. [2021-11-23 13:13:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 13:13:26,538 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.951219512195122) internal successors, (203), 42 states have internal predecessors, (203), 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 75 [2021-11-23 13:13:26,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:26,540 INFO L225 Difference]: With dead ends: 312 [2021-11-23 13:13:26,540 INFO L226 Difference]: Without dead ends: 300 [2021-11-23 13:13:26,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=663, Invalid=2759, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 13:13:26,542 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 989 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:26,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 557 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 704 Invalid, 0 Unknown, 21 Unchecked, 0.4s Time] [2021-11-23 13:13:26,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-23 13:13:26,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 281. [2021-11-23 13:13:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 279 states have (on average 1.0896057347670252) internal successors, (304), 280 states have internal predecessors, (304), 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 13:13:26,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 304 transitions. [2021-11-23 13:13:26,549 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 304 transitions. Word has length 75 [2021-11-23 13:13:26,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:26,549 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 304 transitions. [2021-11-23 13:13:26,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.951219512195122) internal successors, (203), 42 states have internal predecessors, (203), 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 13:13:26,550 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 304 transitions. [2021-11-23 13:13:26,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 13:13:26,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:26,551 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:26,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:26,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:26,779 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:13:26,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:26,780 INFO L85 PathProgramCache]: Analyzing trace with hash 164064156, now seen corresponding path program 5 times [2021-11-23 13:13:26,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:13:26,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468084258] [2021-11-23 13:13:26,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:26,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:13:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 130 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:26,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:13:26,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468084258] [2021-11-23 13:13:26,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468084258] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:13:26,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092451732] [2021-11-23 13:13:26,986 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:13:26,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:26,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:13:26,987 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:13:27,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 13:13:27,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-23 13:13:27,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:13:27,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 13:13:27,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:27,119 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:13:27,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:13:27,651 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 174 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:27,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 174 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:28,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092451732] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:13:28,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:13:28,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 37 [2021-11-23 13:13:28,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183100836] [2021-11-23 13:13:28,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:13:28,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 13:13:28,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:13:28,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 13:13:28,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 13:13:28,037 INFO L87 Difference]: Start difference. First operand 281 states and 304 transitions. Second operand has 37 states, 37 states have (on average 5.756756756756757) internal successors, (213), 37 states have internal predecessors, (213), 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 13:13:28,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:28,353 INFO L93 Difference]: Finished difference Result 473 states and 506 transitions. [2021-11-23 13:13:28,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 13:13:28,353 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.756756756756757) internal successors, (213), 37 states have internal predecessors, (213), 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 95 [2021-11-23 13:13:28,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:28,354 INFO L225 Difference]: With dead ends: 473 [2021-11-23 13:13:28,355 INFO L226 Difference]: Without dead ends: 302 [2021-11-23 13:13:28,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=449, Invalid=1531, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 13:13:28,356 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 157 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:28,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 364 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:13:28,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-23 13:13:28,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 293. [2021-11-23 13:13:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 291 states have (on average 1.0859106529209621) internal successors, (316), 292 states have internal predecessors, (316), 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 13:13:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 316 transitions. [2021-11-23 13:13:28,364 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 316 transitions. Word has length 95 [2021-11-23 13:13:28,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:28,365 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 316 transitions. [2021-11-23 13:13:28,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.756756756756757) internal successors, (213), 37 states have internal predecessors, (213), 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 13:13:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 316 transitions. [2021-11-23 13:13:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 13:13:28,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:28,366 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:28,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:28,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:28,591 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:13:28,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:28,592 INFO L85 PathProgramCache]: Analyzing trace with hash -339437537, now seen corresponding path program 6 times [2021-11-23 13:13:28,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:13:28,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942571603] [2021-11-23 13:13:28,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:28,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:13:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:28,895 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 44 proven. 175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:28,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:13:28,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942571603] [2021-11-23 13:13:28,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942571603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:13:28,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800251441] [2021-11-23 13:13:28,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:13:28,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:28,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:13:28,900 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:13:28,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 13:13:29,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-23 13:13:29,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:13:29,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 13:13:29,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:29,042 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:13:29,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:13:29,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 13:13:29,726 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:13:29,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-23 13:13:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-23 13:13:29,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:30,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 39 [2021-11-23 13:13:30,771 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 47 treesize of output 45 [2021-11-23 13:13:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-23 13:13:30,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800251441] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:13:30,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:13:30,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 36 [2021-11-23 13:13:30,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320080498] [2021-11-23 13:13:30,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:13:30,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-23 13:13:30,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:13:30,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-23 13:13:30,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 13:13:30,956 INFO L87 Difference]: Start difference. First operand 293 states and 316 transitions. Second operand has 36 states, 36 states have (on average 5.194444444444445) internal successors, (187), 36 states have internal predecessors, (187), 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 13:13:32,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:32,186 INFO L93 Difference]: Finished difference Result 490 states and 521 transitions. [2021-11-23 13:13:32,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-23 13:13:32,186 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.194444444444445) internal successors, (187), 36 states have internal predecessors, (187), 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 99 [2021-11-23 13:13:32,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:32,188 INFO L225 Difference]: With dead ends: 490 [2021-11-23 13:13:32,188 INFO L226 Difference]: Without dead ends: 313 [2021-11-23 13:13:32,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=541, Invalid=5159, Unknown=0, NotChecked=0, Total=5700 [2021-11-23 13:13:32,192 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 99 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:32,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 700 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 396 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2021-11-23 13:13:32,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-23 13:13:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 301. [2021-11-23 13:13:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.0733333333333333) internal successors, (322), 300 states have internal predecessors, (322), 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 13:13:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 322 transitions. [2021-11-23 13:13:32,200 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 322 transitions. Word has length 99 [2021-11-23 13:13:32,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:32,200 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 322 transitions. [2021-11-23 13:13:32,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.194444444444445) internal successors, (187), 36 states have internal predecessors, (187), 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 13:13:32,201 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 322 transitions. [2021-11-23 13:13:32,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-23 13:13:32,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:32,202 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:32,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:32,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-23 13:13:32,420 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:13:32,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:32,420 INFO L85 PathProgramCache]: Analyzing trace with hash -336905634, now seen corresponding path program 1 times [2021-11-23 13:13:32,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:13:32,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819344321] [2021-11-23 13:13:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:32,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:13:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 28 proven. 212 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:32,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:13:32,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819344321] [2021-11-23 13:13:32,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819344321] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:13:32,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561156322] [2021-11-23 13:13:32,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:32,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:32,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:13:32,731 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:13:32,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 13:13:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:32,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-23 13:13:32,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:32,847 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:13:32,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:13:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 45 proven. 195 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:33,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 66 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:34,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561156322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:13:34,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:13:34,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2021-11-23 13:13:34,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053950427] [2021-11-23 13:13:34,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:13:34,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 13:13:34,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:13:34,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 13:13:34,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=2026, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 13:13:34,341 INFO L87 Difference]: Start difference. First operand 301 states and 322 transitions. Second operand has 49 states, 48 states have (on average 6.229166666666667) internal successors, (299), 49 states have internal predecessors, (299), 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 13:13:34,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:34,807 INFO L93 Difference]: Finished difference Result 359 states and 388 transitions. [2021-11-23 13:13:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 13:13:34,817 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 6.229166666666667) internal successors, (299), 49 states have internal predecessors, (299), 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 104 [2021-11-23 13:13:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:34,819 INFO L225 Difference]: With dead ends: 359 [2021-11-23 13:13:34,819 INFO L226 Difference]: Without dead ends: 353 [2021-11-23 13:13:34,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=619, Invalid=2687, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 13:13:34,820 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 653 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:34,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 680 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 13:13:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-11-23 13:13:34,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 331. [2021-11-23 13:13:34,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.0727272727272728) internal successors, (354), 330 states have internal predecessors, (354), 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 13:13:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 354 transitions. [2021-11-23 13:13:34,828 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 354 transitions. Word has length 104 [2021-11-23 13:13:34,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:34,829 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 354 transitions. [2021-11-23 13:13:34,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 6.229166666666667) internal successors, (299), 49 states have internal predecessors, (299), 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 13:13:34,829 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 354 transitions. [2021-11-23 13:13:34,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 13:13:34,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:34,830 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:34,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:35,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:35,043 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:13:35,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:35,044 INFO L85 PathProgramCache]: Analyzing trace with hash 743121325, now seen corresponding path program 2 times [2021-11-23 13:13:35,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:13:35,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533036069] [2021-11-23 13:13:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:35,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:13:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 34 proven. 270 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:35,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:13:35,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533036069] [2021-11-23 13:13:35,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533036069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:13:35,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366087144] [2021-11-23 13:13:35,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:13:35,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:35,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:13:35,484 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:13:35,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 13:13:35,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:13:35,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:13:35,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-23 13:13:35,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:35,614 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:13:35,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:13:35,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 13:13:37,637 INFO L354 Elim1Store]: treesize reduction 1, result has 97.7 percent of original size [2021-11-23 13:13:37,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 63 [2021-11-23 13:13:37,859 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 45 proven. 259 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:37,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:39,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:13:39,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 104 [2021-11-23 13:13:39,373 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 36 treesize of output 32 [2021-11-23 13:13:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 66 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:13:40,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366087144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:13:40,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:13:40,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 73 [2021-11-23 13:13:40,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254763828] [2021-11-23 13:13:40,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:13:40,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-23 13:13:40,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:13:40,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-23 13:13:40,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=4883, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 13:13:40,616 INFO L87 Difference]: Start difference. First operand 331 states and 354 transitions. Second operand has 73 states, 73 states have (on average 4.575342465753424) internal successors, (334), 73 states have internal predecessors, (334), 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 13:13:43,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:43,215 INFO L93 Difference]: Finished difference Result 751 states and 798 transitions. [2021-11-23 13:13:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-23 13:13:43,216 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 4.575342465753424) internal successors, (334), 73 states have internal predecessors, (334), 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 114 [2021-11-23 13:13:43,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:43,219 INFO L225 Difference]: With dead ends: 751 [2021-11-23 13:13:43,219 INFO L226 Difference]: Without dead ends: 745 [2021-11-23 13:13:43,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 201 SyntacticMatches, 5 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2719 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=952, Invalid=10178, Unknown=0, NotChecked=0, Total=11130 [2021-11-23 13:13:43,222 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 222 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1385 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:43,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 1385 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 850 Invalid, 0 Unknown, 310 Unchecked, 0.5s Time] [2021-11-23 13:13:43,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2021-11-23 13:13:43,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 609. [2021-11-23 13:13:43,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 608 states have (on average 1.074013157894737) internal successors, (653), 608 states have internal predecessors, (653), 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 13:13:43,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 653 transitions. [2021-11-23 13:13:43,247 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 653 transitions. Word has length 114 [2021-11-23 13:13:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:43,247 INFO L470 AbstractCegarLoop]: Abstraction has 609 states and 653 transitions. [2021-11-23 13:13:43,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 4.575342465753424) internal successors, (334), 73 states have internal predecessors, (334), 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 13:13:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 653 transitions. [2021-11-23 13:13:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 13:13:43,250 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:43,250 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:43,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:43,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:43,472 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:13:43,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:43,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1776838609, now seen corresponding path program 1 times [2021-11-23 13:13:43,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:13:43,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507089474] [2021-11-23 13:13:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:43,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:13:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-11-23 13:13:43,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:13:43,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507089474] [2021-11-23 13:13:43,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507089474] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:13:43,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040942990] [2021-11-23 13:13:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:43,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:43,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:13:43,541 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:13:43,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 13:13:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:43,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 13:13:43,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:43,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-23 13:13:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-11-23 13:13:43,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 85 proven. 12 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2021-11-23 13:13:44,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040942990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:13:44,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:13:44,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2021-11-23 13:13:44,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422516460] [2021-11-23 13:13:44,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:13:44,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 13:13:44,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:13:44,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 13:13:44,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-23 13:13:44,110 INFO L87 Difference]: Start difference. First operand 609 states and 653 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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 13:13:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:44,196 INFO L93 Difference]: Finished difference Result 657 states and 700 transitions. [2021-11-23 13:13:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 13:13:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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 114 [2021-11-23 13:13:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:44,200 INFO L225 Difference]: With dead ends: 657 [2021-11-23 13:13:44,200 INFO L226 Difference]: Without dead ends: 657 [2021-11-23 13:13:44,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-11-23 13:13:44,201 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:44,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 134 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 13:13:44,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-11-23 13:13:44,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 549. [2021-11-23 13:13:44,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.0784671532846715) internal successors, (591), 548 states have internal predecessors, (591), 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 13:13:44,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 591 transitions. [2021-11-23 13:13:44,216 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 591 transitions. Word has length 114 [2021-11-23 13:13:44,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:44,216 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 591 transitions. [2021-11-23 13:13:44,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 states have internal predecessors, (51), 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 13:13:44,217 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 591 transitions. [2021-11-23 13:13:44,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 13:13:44,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:44,219 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:44,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:44,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-23 13:13:44,443 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:13:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:44,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1382878216, now seen corresponding path program 3 times [2021-11-23 13:13:44,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:13:44,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90993954] [2021-11-23 13:13:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:44,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:13:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:44,825 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 34 proven. 270 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:13:44,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:13:44,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90993954] [2021-11-23 13:13:44,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90993954] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:13:44,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661416056] [2021-11-23 13:13:44,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:13:44,826 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:44,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:13:44,832 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:13:44,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 13:13:45,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-23 13:13:45,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:13:45,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-23 13:13:45,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:45,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:13:46,084 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-11-23 13:13:46,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-11-23 13:13:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 34 proven. 270 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:13:46,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:46,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:13:46,429 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 26 treesize of output 22 [2021-11-23 13:13:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 34 proven. 270 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:13:46,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661416056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:13:46,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:13:46,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 52 [2021-11-23 13:13:46,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81468522] [2021-11-23 13:13:46,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:13:46,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-23 13:13:46,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:13:46,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-23 13:13:46,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2492, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 13:13:46,611 INFO L87 Difference]: Start difference. First operand 549 states and 591 transitions. Second operand has 52 states, 52 states have (on average 4.576923076923077) internal successors, (238), 52 states have internal predecessors, (238), 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 13:13:48,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:48,286 INFO L93 Difference]: Finished difference Result 870 states and 925 transitions. [2021-11-23 13:13:48,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 13:13:48,286 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.576923076923077) internal successors, (238), 52 states have internal predecessors, (238), 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 118 [2021-11-23 13:13:48,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:48,290 INFO L225 Difference]: With dead ends: 870 [2021-11-23 13:13:48,291 INFO L226 Difference]: Without dead ends: 870 [2021-11-23 13:13:48,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 205 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=541, Invalid=5939, Unknown=0, NotChecked=0, Total=6480 [2021-11-23 13:13:48,292 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 355 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:48,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 1348 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1834 Invalid, 0 Unknown, 199 Unchecked, 0.8s Time] [2021-11-23 13:13:48,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-11-23 13:13:48,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 549. [2021-11-23 13:13:48,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 1.0784671532846715) internal successors, (591), 548 states have internal predecessors, (591), 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 13:13:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 591 transitions. [2021-11-23 13:13:48,308 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 591 transitions. Word has length 118 [2021-11-23 13:13:48,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:48,308 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 591 transitions. [2021-11-23 13:13:48,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.576923076923077) internal successors, (238), 52 states have internal predecessors, (238), 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 13:13:48,309 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 591 transitions. [2021-11-23 13:13:48,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 13:13:48,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:48,310 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:48,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 13:13:48,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-23 13:13:48,523 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:13:48,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:48,524 INFO L85 PathProgramCache]: Analyzing trace with hash 519812872, now seen corresponding path program 4 times [2021-11-23 13:13:48,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:13:48,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325932269] [2021-11-23 13:13:48,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:48,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:13:48,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 34 proven. 270 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:13:48,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:13:48,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325932269] [2021-11-23 13:13:48,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325932269] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:13:48,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956027992] [2021-11-23 13:13:48,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:13:48,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:48,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:13:48,963 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:13:48,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 13:13:49,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:13:49,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:13:49,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-23 13:13:49,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:49,086 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:13:49,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:13:49,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 13:13:50,593 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 24 treesize of output 18 [2021-11-23 13:13:50,742 INFO L354 Elim1Store]: treesize reduction 24, result has 35.1 percent of original size [2021-11-23 13:13:50,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 37 [2021-11-23 13:13:50,779 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 202 proven. 102 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:13:50,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:52,430 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:13:52,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 97 [2021-11-23 13:13:52,454 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 30 treesize of output 28 [2021-11-23 13:13:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 86 proven. 218 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:13:53,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956027992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:13:53,424 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:13:53,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 70 [2021-11-23 13:13:53,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697835765] [2021-11-23 13:13:53,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:13:53,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-23 13:13:53,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:13:53,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-23 13:13:53,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=4435, Unknown=0, NotChecked=0, Total=4830 [2021-11-23 13:13:53,427 INFO L87 Difference]: Start difference. First operand 549 states and 591 transitions. Second operand has 70 states, 70 states have (on average 4.5285714285714285) internal successors, (317), 70 states have internal predecessors, (317), 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 13:13:58,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:13:58,134 INFO L93 Difference]: Finished difference Result 1077 states and 1145 transitions. [2021-11-23 13:13:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-23 13:13:58,135 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 4.5285714285714285) internal successors, (317), 70 states have internal predecessors, (317), 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 118 [2021-11-23 13:13:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:13:58,138 INFO L225 Difference]: With dead ends: 1077 [2021-11-23 13:13:58,138 INFO L226 Difference]: Without dead ends: 911 [2021-11-23 13:13:58,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 215 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4242 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2857, Invalid=15233, Unknown=0, NotChecked=0, Total=18090 [2021-11-23 13:13:58,141 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 1116 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 1743 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1116 SdHoareTripleChecker+Valid, 1367 SdHoareTripleChecker+Invalid, 2151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:13:58,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1116 Valid, 1367 Invalid, 2151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1743 Invalid, 0 Unknown, 237 Unchecked, 0.9s Time] [2021-11-23 13:13:58,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-11-23 13:13:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 717. [2021-11-23 13:13:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 1.074022346368715) internal successors, (769), 716 states have internal predecessors, (769), 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 13:13:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 769 transitions. [2021-11-23 13:13:58,158 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 769 transitions. Word has length 118 [2021-11-23 13:13:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:13:58,158 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 769 transitions. [2021-11-23 13:13:58,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 4.5285714285714285) internal successors, (317), 70 states have internal predecessors, (317), 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 13:13:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 769 transitions. [2021-11-23 13:13:58,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 13:13:58,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:13:58,161 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:13:58,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-23 13:13:58,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:58,387 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:13:58,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:13:58,388 INFO L85 PathProgramCache]: Analyzing trace with hash -492807032, now seen corresponding path program 5 times [2021-11-23 13:13:58,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:13:58,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987716209] [2021-11-23 13:13:58,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:13:58,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:13:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:13:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 34 proven. 270 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:13:58,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:13:58,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987716209] [2021-11-23 13:13:58,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987716209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:13:58,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010608003] [2021-11-23 13:13:58,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:13:58,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:13:58,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:13:58,776 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:13:58,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 13:13:58,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-23 13:13:58,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:13:58,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-23 13:13:58,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:13:59,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:13:59,628 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-11-23 13:13:59,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-11-23 13:13:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 34 proven. 270 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:13:59,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:13:59,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:13:59,965 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 26 treesize of output 22 [2021-11-23 13:14:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 34 proven. 270 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:00,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010608003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:14:00,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:14:00,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 49 [2021-11-23 13:14:00,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120774085] [2021-11-23 13:14:00,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:14:00,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 13:14:00,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:14:00,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 13:14:00,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2201, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 13:14:00,146 INFO L87 Difference]: Start difference. First operand 717 states and 769 transitions. Second operand has 49 states, 49 states have (on average 4.244897959183674) internal successors, (208), 49 states have internal predecessors, (208), 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 13:14:01,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:14:01,683 INFO L93 Difference]: Finished difference Result 922 states and 978 transitions. [2021-11-23 13:14:01,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 13:14:01,684 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.244897959183674) internal successors, (208), 49 states have internal predecessors, (208), 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 118 [2021-11-23 13:14:01,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:14:01,687 INFO L225 Difference]: With dead ends: 922 [2021-11-23 13:14:01,687 INFO L226 Difference]: Without dead ends: 882 [2021-11-23 13:14:01,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 208 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=603, Invalid=5403, Unknown=0, NotChecked=0, Total=6006 [2021-11-23 13:14:01,689 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 453 mSDsluCounter, 1270 mSDsCounter, 0 mSdLazyCounter, 1725 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 1336 SdHoareTripleChecker+Invalid, 1906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:14:01,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 1336 Invalid, 1906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1725 Invalid, 0 Unknown, 107 Unchecked, 0.7s Time] [2021-11-23 13:14:01,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-11-23 13:14:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 697. [2021-11-23 13:14:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 1.0718390804597702) internal successors, (746), 696 states have internal predecessors, (746), 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 13:14:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 746 transitions. [2021-11-23 13:14:01,704 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 746 transitions. Word has length 118 [2021-11-23 13:14:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:14:01,705 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 746 transitions. [2021-11-23 13:14:01,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.244897959183674) internal successors, (208), 49 states have internal predecessors, (208), 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 13:14:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 746 transitions. [2021-11-23 13:14:01,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 13:14:01,707 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:14:01,707 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:14:01,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 13:14:01,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-23 13:14:01,923 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:14:01,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:14:01,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1755072392, now seen corresponding path program 6 times [2021-11-23 13:14:01,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:14:01,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270007614] [2021-11-23 13:14:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:14:01,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:14:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 34 proven. 270 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:02,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:14:02,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270007614] [2021-11-23 13:14:02,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270007614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:14:02,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448288634] [2021-11-23 13:14:02,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:14:02,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:02,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:14:02,285 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:14:02,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 13:14:02,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-23 13:14:02,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:14:02,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-23 13:14:02,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:14:02,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:14:03,114 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-11-23 13:14:03,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-11-23 13:14:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 34 proven. 270 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:03,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:14:03,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:14:03,402 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 26 treesize of output 22 [2021-11-23 13:14:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 34 proven. 270 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:03,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448288634] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:14:03,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:14:03,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 45 [2021-11-23 13:14:03,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418757085] [2021-11-23 13:14:03,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:14:03,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-23 13:14:03,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:14:03,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-23 13:14:03,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 13:14:03,576 INFO L87 Difference]: Start difference. First operand 697 states and 746 transitions. Second operand has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 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 13:14:04,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:14:04,844 INFO L93 Difference]: Finished difference Result 782 states and 830 transitions. [2021-11-23 13:14:04,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-23 13:14:04,845 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 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 118 [2021-11-23 13:14:04,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:14:04,847 INFO L225 Difference]: With dead ends: 782 [2021-11-23 13:14:04,848 INFO L226 Difference]: Without dead ends: 782 [2021-11-23 13:14:04,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 212 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=455, Invalid=4237, Unknown=0, NotChecked=0, Total=4692 [2021-11-23 13:14:04,848 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 329 mSDsluCounter, 1401 mSDsCounter, 0 mSdLazyCounter, 1589 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 1753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:14:04,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 1471 Invalid, 1753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1589 Invalid, 0 Unknown, 124 Unchecked, 0.6s Time] [2021-11-23 13:14:04,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-11-23 13:14:04,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 703. [2021-11-23 13:14:04,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 1.0698005698005697) internal successors, (751), 702 states have internal predecessors, (751), 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 13:14:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 751 transitions. [2021-11-23 13:14:04,862 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 751 transitions. Word has length 118 [2021-11-23 13:14:04,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:14:04,863 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 751 transitions. [2021-11-23 13:14:04,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 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 13:14:04,863 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 751 transitions. [2021-11-23 13:14:04,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-23 13:14:04,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:14:04,866 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:14:04,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 13:14:05,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:05,079 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:14:05,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:14:05,080 INFO L85 PathProgramCache]: Analyzing trace with hash 46849061, now seen corresponding path program 7 times [2021-11-23 13:14:05,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:14:05,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682805488] [2021-11-23 13:14:05,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:14:05,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:14:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 45 proven. 284 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:05,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:14:05,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682805488] [2021-11-23 13:14:05,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682805488] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:14:05,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486206614] [2021-11-23 13:14:05,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:14:05,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:05,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:14:05,420 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:14:05,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 13:14:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:05,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-23 13:14:05,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:14:05,541 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:14:05,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:14:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 66 proven. 263 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:06,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:14:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 91 proven. 238 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:07,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486206614] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:14:07,426 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:14:07,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 54 [2021-11-23 13:14:07,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745842298] [2021-11-23 13:14:07,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:14:07,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-23 13:14:07,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:14:07,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-23 13:14:07,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=2569, Unknown=0, NotChecked=0, Total=2970 [2021-11-23 13:14:07,428 INFO L87 Difference]: Start difference. First operand 703 states and 751 transitions. Second operand has 55 states, 54 states have (on average 6.314814814814815) internal successors, (341), 55 states have internal predecessors, (341), 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 13:14:08,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:14:08,151 INFO L93 Difference]: Finished difference Result 920 states and 976 transitions. [2021-11-23 13:14:08,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 13:14:08,151 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 6.314814814814815) internal successors, (341), 55 states have internal predecessors, (341), 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 122 [2021-11-23 13:14:08,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:14:08,154 INFO L225 Difference]: With dead ends: 920 [2021-11-23 13:14:08,154 INFO L226 Difference]: Without dead ends: 914 [2021-11-23 13:14:08,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=797, Invalid=3493, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 13:14:08,155 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 401 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:14:08,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 1018 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 13:14:08,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2021-11-23 13:14:08,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 663. [2021-11-23 13:14:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.06797583081571) internal successors, (707), 662 states have internal predecessors, (707), 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 13:14:08,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 707 transitions. [2021-11-23 13:14:08,170 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 707 transitions. Word has length 122 [2021-11-23 13:14:08,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:14:08,171 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 707 transitions. [2021-11-23 13:14:08,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 6.314814814814815) internal successors, (341), 55 states have internal predecessors, (341), 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 13:14:08,171 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 707 transitions. [2021-11-23 13:14:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-23 13:14:08,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:14:08,174 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:14:08,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 13:14:08,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:08,399 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:14:08,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:14:08,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1925683353, now seen corresponding path program 8 times [2021-11-23 13:14:08,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:14:08,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032883499] [2021-11-23 13:14:08,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:14:08,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:14:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 39 proven. 364 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:14:08,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:14:08,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032883499] [2021-11-23 13:14:08,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032883499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:14:08,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019434534] [2021-11-23 13:14:08,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:14:08,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:08,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:14:08,860 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:14:08,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 13:14:08,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:14:08,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:14:08,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-23 13:14:08,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:14:09,001 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:14:09,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:14:09,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 13:14:11,481 INFO L354 Elim1Store]: treesize reduction 1, result has 97.7 percent of original size [2021-11-23 13:14:11,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 63 [2021-11-23 13:14:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 66 proven. 337 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:14:11,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:14:13,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:14:13,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 104 [2021-11-23 13:14:13,433 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 36 treesize of output 32 [2021-11-23 13:14:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 91 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:14:14,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019434534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:14:14,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:14:14,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 79 [2021-11-23 13:14:14,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230625162] [2021-11-23 13:14:14,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:14:14,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-23 13:14:14,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:14:14,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-23 13:14:14,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=5736, Unknown=0, NotChecked=0, Total=6162 [2021-11-23 13:14:14,848 INFO L87 Difference]: Start difference. First operand 663 states and 707 transitions. Second operand has 79 states, 79 states have (on average 4.7594936708860756) internal successors, (376), 79 states have internal predecessors, (376), 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 13:14:17,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:14:17,709 INFO L93 Difference]: Finished difference Result 1236 states and 1309 transitions. [2021-11-23 13:14:17,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-23 13:14:17,710 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 4.7594936708860756) internal successors, (376), 79 states have internal predecessors, (376), 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 128 [2021-11-23 13:14:17,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:14:17,716 INFO L225 Difference]: With dead ends: 1236 [2021-11-23 13:14:17,717 INFO L226 Difference]: Without dead ends: 1230 [2021-11-23 13:14:17,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 229 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3198 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1080, Invalid=11802, Unknown=0, NotChecked=0, Total=12882 [2021-11-23 13:14:17,718 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 551 mSDsluCounter, 1740 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 1788 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 488 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 13:14:17,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 1788 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1449 Invalid, 0 Unknown, 488 Unchecked, 0.7s Time] [2021-11-23 13:14:17,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-11-23 13:14:17,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 905. [2021-11-23 13:14:17,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 904 states have (on average 1.075221238938053) internal successors, (972), 904 states have internal predecessors, (972), 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 13:14:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 972 transitions. [2021-11-23 13:14:17,740 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 972 transitions. Word has length 128 [2021-11-23 13:14:17,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:14:17,740 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 972 transitions. [2021-11-23 13:14:17,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 4.7594936708860756) internal successors, (376), 79 states have internal predecessors, (376), 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 13:14:17,741 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 972 transitions. [2021-11-23 13:14:17,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-23 13:14:17,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:14:17,744 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:14:17,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-11-23 13:14:17,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:17,971 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:14:17,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:14:17,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1151703337, now seen corresponding path program 9 times [2021-11-23 13:14:17,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:14:17,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663260595] [2021-11-23 13:14:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:14:17,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:14:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 247 proven. 130 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:14:18,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:14:18,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663260595] [2021-11-23 13:14:18,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663260595] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:14:18,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15432113] [2021-11-23 13:14:18,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:14:18,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:18,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:14:18,276 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:14:18,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 13:14:18,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 13:14:18,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:14:18,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 13:14:18,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:14:18,523 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:14:18,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:14:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 311 proven. 66 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:14:19,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:14:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 311 proven. 66 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 13:14:19,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15432113] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:14:19,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:14:19,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 47 [2021-11-23 13:14:19,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644662404] [2021-11-23 13:14:19,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:14:19,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 13:14:19,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:14:19,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 13:14:19,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=1752, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 13:14:19,949 INFO L87 Difference]: Start difference. First operand 905 states and 972 transitions. Second operand has 47 states, 47 states have (on average 5.914893617021277) internal successors, (278), 47 states have internal predecessors, (278), 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 13:14:20,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:14:20,370 INFO L93 Difference]: Finished difference Result 958 states and 1015 transitions. [2021-11-23 13:14:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 13:14:20,371 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 5.914893617021277) internal successors, (278), 47 states have internal predecessors, (278), 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 128 [2021-11-23 13:14:20,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:14:20,374 INFO L225 Difference]: With dead ends: 958 [2021-11-23 13:14:20,374 INFO L226 Difference]: Without dead ends: 624 [2021-11-23 13:14:20,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=697, Invalid=2495, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 13:14:20,375 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 235 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:14:20,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 439 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 13:14:20,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-11-23 13:14:20,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 621. [2021-11-23 13:14:20,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 1.0774193548387097) internal successors, (668), 620 states have internal predecessors, (668), 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 13:14:20,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 668 transitions. [2021-11-23 13:14:20,386 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 668 transitions. Word has length 128 [2021-11-23 13:14:20,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:14:20,386 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 668 transitions. [2021-11-23 13:14:20,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 5.914893617021277) internal successors, (278), 47 states have internal predecessors, (278), 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 13:14:20,387 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 668 transitions. [2021-11-23 13:14:20,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 13:14:20,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:14:20,389 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:14:20,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-23 13:14:20,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:20,615 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:14:20,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:14:20,616 INFO L85 PathProgramCache]: Analyzing trace with hash 178026164, now seen corresponding path program 10 times [2021-11-23 13:14:20,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:14:20,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726302440] [2021-11-23 13:14:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:14:20,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:14:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 39 proven. 364 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:21,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:14:21,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726302440] [2021-11-23 13:14:21,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726302440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:14:21,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932402759] [2021-11-23 13:14:21,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:14:21,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:21,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:14:21,096 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:14:21,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 13:14:21,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:14:21,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:14:21,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-23 13:14:21,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:14:21,220 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:14:21,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:14:21,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 13:14:22,910 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 24 treesize of output 18 [2021-11-23 13:14:23,098 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-23 13:14:23,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 39 [2021-11-23 13:14:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 267 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:23,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:14:24,970 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:14:24,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 97 [2021-11-23 13:14:25,002 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 30 treesize of output 28 [2021-11-23 13:14:26,092 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 142 proven. 261 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:26,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932402759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:14:26,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:14:26,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 76 [2021-11-23 13:14:26,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625069576] [2021-11-23 13:14:26,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:14:26,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-23 13:14:26,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:14:26,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-23 13:14:26,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=5238, Unknown=0, NotChecked=0, Total=5700 [2021-11-23 13:14:26,095 INFO L87 Difference]: Start difference. First operand 621 states and 668 transitions. Second operand has 76 states, 76 states have (on average 4.723684210526316) internal successors, (359), 76 states have internal predecessors, (359), 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 13:14:31,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:14:31,719 INFO L93 Difference]: Finished difference Result 1287 states and 1366 transitions. [2021-11-23 13:14:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-23 13:14:31,719 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 4.723684210526316) internal successors, (359), 76 states have internal predecessors, (359), 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 132 [2021-11-23 13:14:31,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:14:31,723 INFO L225 Difference]: With dead ends: 1287 [2021-11-23 13:14:31,723 INFO L226 Difference]: Without dead ends: 1035 [2021-11-23 13:14:31,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 227 SyntacticMatches, 18 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5035 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3289, Invalid=16451, Unknown=0, NotChecked=0, Total=19740 [2021-11-23 13:14:31,725 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 655 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 2561 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 3254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 576 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:14:31,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 1342 Invalid, 3254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2561 Invalid, 0 Unknown, 576 Unchecked, 1.2s Time] [2021-11-23 13:14:31,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-11-23 13:14:31,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 909. [2021-11-23 13:14:31,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 1.0693832599118942) internal successors, (971), 908 states have internal predecessors, (971), 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 13:14:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 971 transitions. [2021-11-23 13:14:31,743 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 971 transitions. Word has length 132 [2021-11-23 13:14:31,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:14:31,743 INFO L470 AbstractCegarLoop]: Abstraction has 909 states and 971 transitions. [2021-11-23 13:14:31,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 4.723684210526316) internal successors, (359), 76 states have internal predecessors, (359), 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 13:14:31,744 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 971 transitions. [2021-11-23 13:14:31,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 13:14:31,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:14:31,747 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:14:31,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-23 13:14:31,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-23 13:14:31,971 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:14:31,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:14:31,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1055825484, now seen corresponding path program 11 times [2021-11-23 13:14:31,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:14:31,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768300722] [2021-11-23 13:14:31,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:14:31,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:14:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 39 proven. 364 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:32,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:14:32,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768300722] [2021-11-23 13:14:32,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768300722] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:14:32,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807277018] [2021-11-23 13:14:32,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:14:32,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:32,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:14:32,447 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:14:32,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 13:14:32,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-23 13:14:32,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:14:32,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-23 13:14:32,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:14:32,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:14:33,677 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-11-23 13:14:33,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-11-23 13:14:33,728 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 39 proven. 364 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:33,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:14:34,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:14:34,072 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 26 treesize of output 22 [2021-11-23 13:14:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 39 proven. 364 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:34,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807277018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:14:34,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:14:34,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 54 [2021-11-23 13:14:34,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535065037] [2021-11-23 13:14:34,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:14:34,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-23 13:14:34,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:14:34,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-23 13:14:34,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2697, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 13:14:34,263 INFO L87 Difference]: Start difference. First operand 909 states and 971 transitions. Second operand has 54 states, 54 states have (on average 4.555555555555555) internal successors, (246), 54 states have internal predecessors, (246), 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 13:14:36,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:14:36,283 INFO L93 Difference]: Finished difference Result 965 states and 1024 transitions. [2021-11-23 13:14:36,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 13:14:36,284 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.555555555555555) internal successors, (246), 54 states have internal predecessors, (246), 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 132 [2021-11-23 13:14:36,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:14:36,287 INFO L225 Difference]: With dead ends: 965 [2021-11-23 13:14:36,287 INFO L226 Difference]: Without dead ends: 905 [2021-11-23 13:14:36,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 233 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1750 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=642, Invalid=6498, Unknown=0, NotChecked=0, Total=7140 [2021-11-23 13:14:36,288 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 484 mSDsluCounter, 1817 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 2825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 13:14:36,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 1889 Invalid, 2825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 2705 Invalid, 0 Unknown, 29 Unchecked, 1.1s Time] [2021-11-23 13:14:36,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-11-23 13:14:36,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 849. [2021-11-23 13:14:36,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 1.0683962264150944) internal successors, (906), 848 states have internal predecessors, (906), 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 13:14:36,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 906 transitions. [2021-11-23 13:14:36,303 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 906 transitions. Word has length 132 [2021-11-23 13:14:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:14:36,303 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 906 transitions. [2021-11-23 13:14:36,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.555555555555555) internal successors, (246), 54 states have internal predecessors, (246), 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 13:14:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 906 transitions. [2021-11-23 13:14:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-23 13:14:36,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:14:36,306 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:14:36,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-23 13:14:36,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-23 13:14:36,527 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:14:36,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:14:36,528 INFO L85 PathProgramCache]: Analyzing trace with hash -454439756, now seen corresponding path program 12 times [2021-11-23 13:14:36,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:14:36,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771871534] [2021-11-23 13:14:36,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:14:36,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:14:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 39 proven. 364 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:37,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:14:37,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771871534] [2021-11-23 13:14:37,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771871534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:14:37,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245951781] [2021-11-23 13:14:37,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:14:37,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:37,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:14:37,047 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:14:37,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 13:14:37,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-23 13:14:37,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:14:37,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-23 13:14:37,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:14:37,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:14:38,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 13:14:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 60 proven. 343 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:38,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:14:38,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:14:38,299 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 26 treesize of output 22 [2021-11-23 13:14:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 60 proven. 343 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:38,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245951781] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:14:38,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:14:38,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 47 [2021-11-23 13:14:38,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606841538] [2021-11-23 13:14:38,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:14:38,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 13:14:38,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:14:38,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 13:14:38,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2025, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 13:14:38,483 INFO L87 Difference]: Start difference. First operand 849 states and 906 transitions. Second operand has 47 states, 47 states have (on average 4.74468085106383) internal successors, (223), 47 states have internal predecessors, (223), 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 13:14:40,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:14:40,153 INFO L93 Difference]: Finished difference Result 790 states and 830 transitions. [2021-11-23 13:14:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 13:14:40,153 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.74468085106383) internal successors, (223), 47 states have internal predecessors, (223), 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 132 [2021-11-23 13:14:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:14:40,155 INFO L225 Difference]: With dead ends: 790 [2021-11-23 13:14:40,155 INFO L226 Difference]: Without dead ends: 470 [2021-11-23 13:14:40,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 241 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=560, Invalid=5140, Unknown=0, NotChecked=0, Total=5700 [2021-11-23 13:14:40,156 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 632 mSDsluCounter, 1830 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 632 SdHoareTripleChecker+Valid, 1904 SdHoareTripleChecker+Invalid, 2460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:14:40,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [632 Valid, 1904 Invalid, 2460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 2305 Invalid, 0 Unknown, 63 Unchecked, 0.9s Time] [2021-11-23 13:14:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-23 13:14:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 461. [2021-11-23 13:14:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 1.0695652173913044) internal successors, (492), 460 states have internal predecessors, (492), 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 13:14:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 492 transitions. [2021-11-23 13:14:40,165 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 492 transitions. Word has length 132 [2021-11-23 13:14:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:14:40,166 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 492 transitions. [2021-11-23 13:14:40,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.74468085106383) internal successors, (223), 47 states have internal predecessors, (223), 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 13:14:40,166 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 492 transitions. [2021-11-23 13:14:40,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-23 13:14:40,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:14:40,168 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:14:40,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-23 13:14:40,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-23 13:14:40,389 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:14:40,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:14:40,389 INFO L85 PathProgramCache]: Analyzing trace with hash -932622319, now seen corresponding path program 13 times [2021-11-23 13:14:40,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:14:40,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040573335] [2021-11-23 13:14:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:14:40,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:14:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 66 proven. 366 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:40,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:14:40,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040573335] [2021-11-23 13:14:40,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040573335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:14:40,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657571920] [2021-11-23 13:14:40,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:14:40,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:40,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:14:40,779 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:14:40,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 13:14:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:40,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-23 13:14:40,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:14:40,910 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:14:40,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:14:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 91 proven. 341 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:42,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:14:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 312 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:14:43,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657571920] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:14:43,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:14:43,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 60 [2021-11-23 13:14:43,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341141342] [2021-11-23 13:14:43,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:14:43,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-23 13:14:43,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:14:43,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-23 13:14:43,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=484, Invalid=3176, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 13:14:43,209 INFO L87 Difference]: Start difference. First operand 461 states and 492 transitions. Second operand has 61 states, 60 states have (on average 6.383333333333334) internal successors, (383), 61 states have internal predecessors, (383), 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 13:14:43,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:14:43,987 INFO L93 Difference]: Finished difference Result 597 states and 634 transitions. [2021-11-23 13:14:43,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 13:14:43,988 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 6.383333333333334) internal successors, (383), 61 states have internal predecessors, (383), 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 136 [2021-11-23 13:14:43,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:14:43,990 INFO L225 Difference]: With dead ends: 597 [2021-11-23 13:14:43,990 INFO L226 Difference]: Without dead ends: 591 [2021-11-23 13:14:43,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=920, Invalid=4192, Unknown=0, NotChecked=0, Total=5112 [2021-11-23 13:14:43,991 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1025 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1239 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:14:43,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1239 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 13:14:43,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-11-23 13:14:43,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 411. [2021-11-23 13:14:43,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 1.0658536585365854) internal successors, (437), 410 states have internal predecessors, (437), 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 13:14:43,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 437 transitions. [2021-11-23 13:14:43,998 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 437 transitions. Word has length 136 [2021-11-23 13:14:43,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:14:43,999 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 437 transitions. [2021-11-23 13:14:43,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 6.383333333333334) internal successors, (383), 61 states have internal predecessors, (383), 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 13:14:43,999 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 437 transitions. [2021-11-23 13:14:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-23 13:14:44,001 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:14:44,001 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:14:44,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-23 13:14:44,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:44,217 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:14:44,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:14:44,217 INFO L85 PathProgramCache]: Analyzing trace with hash 494432709, now seen corresponding path program 14 times [2021-11-23 13:14:44,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:14:44,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668624409] [2021-11-23 13:14:44,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:14:44,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:14:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:14:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 44 proven. 472 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:14:44,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:14:44,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668624409] [2021-11-23 13:14:44,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668624409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:14:44,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048220282] [2021-11-23 13:14:44,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:14:44,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:14:44,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:14:44,760 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:14:44,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 13:14:44,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:14:44,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:14:44,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-23 13:14:44,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:14:45,075 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 25 treesize of output 21 [2021-11-23 13:14:48,504 INFO L354 Elim1Store]: treesize reduction 1, result has 97.4 percent of original size [2021-11-23 13:14:48,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 66 [2021-11-23 13:14:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 91 proven. 425 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:14:48,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:14:50,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:14:50,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 111 [2021-11-23 13:14:50,519 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 101 treesize of output 97 [2021-11-23 13:14:50,542 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 36 treesize of output 32 [2021-11-23 13:14:50,679 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 91 proven. 425 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:14:50,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048220282] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:14:50,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:14:50,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 74 [2021-11-23 13:14:50,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583790875] [2021-11-23 13:14:50,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:14:50,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-23 13:14:50,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:14:50,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-23 13:14:50,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=5041, Unknown=0, NotChecked=0, Total=5402 [2021-11-23 13:14:50,681 INFO L87 Difference]: Start difference. First operand 411 states and 437 transitions. Second operand has 74 states, 74 states have (on average 5.094594594594595) internal successors, (377), 74 states have internal predecessors, (377), 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 13:15:02,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:15:02,949 INFO L93 Difference]: Finished difference Result 967 states and 1023 transitions. [2021-11-23 13:15:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-23 13:15:02,949 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 5.094594594594595) internal successors, (377), 74 states have internal predecessors, (377), 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 142 [2021-11-23 13:15:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:15:02,953 INFO L225 Difference]: With dead ends: 967 [2021-11-23 13:15:02,953 INFO L226 Difference]: Without dead ends: 961 [2021-11-23 13:15:02,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 269 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=651, Invalid=8279, Unknown=0, NotChecked=0, Total=8930 [2021-11-23 13:15:02,954 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 269 mSDsluCounter, 2413 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 2479 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:15:02,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 2479 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1089 Invalid, 0 Unknown, 312 Unchecked, 0.5s Time] [2021-11-23 13:15:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2021-11-23 13:15:02,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 693. [2021-11-23 13:15:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 1.0765895953757225) internal successors, (745), 692 states have internal predecessors, (745), 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 13:15:02,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 745 transitions. [2021-11-23 13:15:02,964 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 745 transitions. Word has length 142 [2021-11-23 13:15:02,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:15:02,964 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 745 transitions. [2021-11-23 13:15:02,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 5.094594594594595) internal successors, (377), 74 states have internal predecessors, (377), 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 13:15:02,964 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 745 transitions. [2021-11-23 13:15:02,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 13:15:02,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:15:02,966 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:15:03,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 13:15:03,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:03,183 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:15:03,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:15:03,183 INFO L85 PathProgramCache]: Analyzing trace with hash -505678944, now seen corresponding path program 15 times [2021-11-23 13:15:03,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:15:03,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952380026] [2021-11-23 13:15:03,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:15:03,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:15:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:15:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 44 proven. 472 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:03,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:15:03,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952380026] [2021-11-23 13:15:03,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952380026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:15:03,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087234515] [2021-11-23 13:15:03,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:15:03,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:03,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:15:03,649 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:15:03,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-23 13:15:03,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-23 13:15:03,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:15:03,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-23 13:15:03,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:15:04,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:15:05,068 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-11-23 13:15:05,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-11-23 13:15:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 44 proven. 472 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:05,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:15:05,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:15:05,527 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 26 treesize of output 22 [2021-11-23 13:15:05,769 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 44 proven. 472 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:05,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087234515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:15:05,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:15:05,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 60 [2021-11-23 13:15:05,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387445328] [2021-11-23 13:15:05,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:15:05,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-23 13:15:05,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:15:05,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-23 13:15:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3358, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 13:15:05,771 INFO L87 Difference]: Start difference. First operand 693 states and 745 transitions. Second operand has 60 states, 60 states have (on average 4.9) internal successors, (294), 60 states have internal predecessors, (294), 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 13:15:08,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:15:08,241 INFO L93 Difference]: Finished difference Result 1111 states and 1180 transitions. [2021-11-23 13:15:08,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-23 13:15:08,242 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 4.9) internal successors, (294), 60 states have internal predecessors, (294), 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 146 [2021-11-23 13:15:08,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:15:08,246 INFO L225 Difference]: With dead ends: 1111 [2021-11-23 13:15:08,246 INFO L226 Difference]: Without dead ends: 1111 [2021-11-23 13:15:08,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 257 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2188 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=685, Invalid=7871, Unknown=0, NotChecked=0, Total=8556 [2021-11-23 13:15:08,247 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 406 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 3005 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 1926 SdHoareTripleChecker+Invalid, 3156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 3005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 13:15:08,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 1926 Invalid, 3156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 3005 Invalid, 0 Unknown, 67 Unchecked, 1.3s Time] [2021-11-23 13:15:08,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-11-23 13:15:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 693. [2021-11-23 13:15:08,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 692 states have (on average 1.0765895953757225) internal successors, (745), 692 states have internal predecessors, (745), 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 13:15:08,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 745 transitions. [2021-11-23 13:15:08,257 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 745 transitions. Word has length 146 [2021-11-23 13:15:08,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:15:08,257 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 745 transitions. [2021-11-23 13:15:08,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 4.9) internal successors, (294), 60 states have internal predecessors, (294), 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 13:15:08,258 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 745 transitions. [2021-11-23 13:15:08,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 13:15:08,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:15:08,260 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:15:08,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-23 13:15:08,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-23 13:15:08,475 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:15:08,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:15:08,476 INFO L85 PathProgramCache]: Analyzing trace with hash 124198560, now seen corresponding path program 16 times [2021-11-23 13:15:08,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:15:08,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215387628] [2021-11-23 13:15:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:15:08,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:15:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:15:09,085 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 44 proven. 472 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:09,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:15:09,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215387628] [2021-11-23 13:15:09,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215387628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:15:09,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676036145] [2021-11-23 13:15:09,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:15:09,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:09,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:15:09,087 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:15:09,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-23 13:15:09,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:15:09,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:15:09,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-23 13:15:09,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:15:09,228 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:15:09,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:15:09,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 13:15:11,083 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 24 treesize of output 18 [2021-11-23 13:15:11,248 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-23 13:15:11,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 39 [2021-11-23 13:15:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 346 proven. 170 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:11,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:15:13,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:15:13,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 97 [2021-11-23 13:15:13,207 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 30 treesize of output 28 [2021-11-23 13:15:14,473 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 164 proven. 352 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:14,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676036145] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:15:14,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:15:14,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 82 [2021-11-23 13:15:14,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882031680] [2021-11-23 13:15:14,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:15:14,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-23 13:15:14,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:15:14,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-23 13:15:14,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=6109, Unknown=0, NotChecked=0, Total=6642 [2021-11-23 13:15:14,476 INFO L87 Difference]: Start difference. First operand 693 states and 745 transitions. Second operand has 82 states, 82 states have (on average 4.890243902439025) internal successors, (401), 82 states have internal predecessors, (401), 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 13:15:21,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:15:21,157 INFO L93 Difference]: Finished difference Result 1249 states and 1327 transitions. [2021-11-23 13:15:21,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-23 13:15:21,158 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 4.890243902439025) internal successors, (401), 82 states have internal predecessors, (401), 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 146 [2021-11-23 13:15:21,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:15:21,163 INFO L225 Difference]: With dead ends: 1249 [2021-11-23 13:15:21,163 INFO L226 Difference]: Without dead ends: 1047 [2021-11-23 13:15:21,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 250 SyntacticMatches, 35 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6148 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=3504, Invalid=17958, Unknown=0, NotChecked=0, Total=21462 [2021-11-23 13:15:21,165 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 1045 mSDsluCounter, 1518 mSDsCounter, 0 mSdLazyCounter, 2456 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1045 SdHoareTripleChecker+Valid, 1571 SdHoareTripleChecker+Invalid, 3379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 2456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 767 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:15:21,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1045 Valid, 1571 Invalid, 3379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2456 Invalid, 0 Unknown, 767 Unchecked, 1.2s Time] [2021-11-23 13:15:21,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-11-23 13:15:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 981. [2021-11-23 13:15:21,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 1.0683673469387756) internal successors, (1047), 980 states have internal predecessors, (1047), 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 13:15:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1047 transitions. [2021-11-23 13:15:21,181 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1047 transitions. Word has length 146 [2021-11-23 13:15:21,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:15:21,182 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1047 transitions. [2021-11-23 13:15:21,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 4.890243902439025) internal successors, (401), 82 states have internal predecessors, (401), 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 13:15:21,182 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1047 transitions. [2021-11-23 13:15:21,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 13:15:21,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:15:21,185 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:15:21,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-23 13:15:21,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:21,403 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:15:21,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:15:21,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1942094880, now seen corresponding path program 17 times [2021-11-23 13:15:21,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:15:21,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455867164] [2021-11-23 13:15:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:15:21,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:15:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:15:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 44 proven. 472 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:22,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:15:22,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455867164] [2021-11-23 13:15:22,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455867164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:15:22,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268431270] [2021-11-23 13:15:22,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:15:22,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:22,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:15:22,012 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:15:22,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-23 13:15:22,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-23 13:15:22,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:15:22,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-23 13:15:22,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:15:22,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:15:22,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 13:15:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 68 proven. 448 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:22,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:15:23,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:15:23,236 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 26 treesize of output 22 [2021-11-23 13:15:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 522 backedges. 68 proven. 448 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:23,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268431270] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:15:23,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:15:23,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 52 [2021-11-23 13:15:23,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82037610] [2021-11-23 13:15:23,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:15:23,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-23 13:15:23,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:15:23,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-23 13:15:23,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 13:15:23,469 INFO L87 Difference]: Start difference. First operand 981 states and 1047 transitions. Second operand has 52 states, 52 states have (on average 5.019230769230769) internal successors, (261), 52 states have internal predecessors, (261), 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 13:15:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:15:25,733 INFO L93 Difference]: Finished difference Result 956 states and 1003 transitions. [2021-11-23 13:15:25,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-23 13:15:25,733 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 5.019230769230769) internal successors, (261), 52 states have internal predecessors, (261), 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 146 [2021-11-23 13:15:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:15:25,735 INFO L225 Difference]: With dead ends: 956 [2021-11-23 13:15:25,736 INFO L226 Difference]: Without dead ends: 522 [2021-11-23 13:15:25,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=631, Invalid=6509, Unknown=0, NotChecked=0, Total=7140 [2021-11-23 13:15:25,736 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 663 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 2750 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 2962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 13:15:25,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 2120 Invalid, 2962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2750 Invalid, 0 Unknown, 118 Unchecked, 1.2s Time] [2021-11-23 13:15:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-23 13:15:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 513. [2021-11-23 13:15:25,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.068359375) internal successors, (547), 512 states have internal predecessors, (547), 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 13:15:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 547 transitions. [2021-11-23 13:15:25,744 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 547 transitions. Word has length 146 [2021-11-23 13:15:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:15:25,744 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 547 transitions. [2021-11-23 13:15:25,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.019230769230769) internal successors, (261), 52 states have internal predecessors, (261), 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 13:15:25,745 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 547 transitions. [2021-11-23 13:15:25,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 13:15:25,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:15:25,746 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:15:25,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-23 13:15:25,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:25,946 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:15:25,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:15:25,947 INFO L85 PathProgramCache]: Analyzing trace with hash 745449021, now seen corresponding path program 18 times [2021-11-23 13:15:25,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:15:25,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335255633] [2021-11-23 13:15:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:15:25,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:15:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:15:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 91 proven. 458 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:26,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:15:26,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335255633] [2021-11-23 13:15:26,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335255633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:15:26,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85366355] [2021-11-23 13:15:26,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:15:26,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:26,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:15:26,435 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:15:26,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 13:15:26,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-23 13:15:26,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:15:26,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-23 13:15:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:15:26,762 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:15:26,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:15:27,899 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 120 proven. 429 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:27,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:15:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 153 proven. 396 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:29,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85366355] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:15:29,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:15:29,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 67 [2021-11-23 13:15:29,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527098960] [2021-11-23 13:15:29,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:15:29,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-23 13:15:29,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:15:29,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-23 13:15:29,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=661, Invalid=3895, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 13:15:29,336 INFO L87 Difference]: Start difference. First operand 513 states and 547 transitions. Second operand has 68 states, 67 states have (on average 6.417910447761194) internal successors, (430), 68 states have internal predecessors, (430), 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 13:15:30,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:15:30,198 INFO L93 Difference]: Finished difference Result 659 states and 699 transitions. [2021-11-23 13:15:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 13:15:30,198 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 6.417910447761194) internal successors, (430), 68 states have internal predecessors, (430), 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 150 [2021-11-23 13:15:30,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:15:30,200 INFO L225 Difference]: With dead ends: 659 [2021-11-23 13:15:30,201 INFO L226 Difference]: Without dead ends: 653 [2021-11-23 13:15:30,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1968 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1240, Invalid=5080, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 13:15:30,202 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1222 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:15:30,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1222 Valid, 894 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 13:15:30,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-11-23 13:15:30,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 453. [2021-11-23 13:15:30,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.0641592920353982) internal successors, (481), 452 states have internal predecessors, (481), 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 13:15:30,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 481 transitions. [2021-11-23 13:15:30,210 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 481 transitions. Word has length 150 [2021-11-23 13:15:30,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:15:30,211 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 481 transitions. [2021-11-23 13:15:30,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 6.417910447761194) internal successors, (430), 68 states have internal predecessors, (430), 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 13:15:30,211 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 481 transitions. [2021-11-23 13:15:30,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 13:15:30,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:15:30,213 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:15:30,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-23 13:15:30,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-23 13:15:30,427 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:15:30,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:15:30,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1846366927, now seen corresponding path program 19 times [2021-11-23 13:15:30,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:15:30,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115691077] [2021-11-23 13:15:30,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:15:30,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:15:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:15:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 49 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:15:30,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:15:30,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115691077] [2021-11-23 13:15:30,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115691077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:15:30,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360138259] [2021-11-23 13:15:30,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 13:15:30,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:30,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:15:30,943 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:15:30,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-23 13:15:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:15:31,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-23 13:15:31,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:15:31,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:15:33,128 INFO L354 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2021-11-23 13:15:33,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 32 [2021-11-23 13:15:33,175 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 49 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:15:33,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:15:33,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:15:33,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 91 [2021-11-23 13:15:33,772 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 36 treesize of output 32 [2021-11-23 13:15:34,052 INFO L134 CoverageAnalysis]: Checked inductivity of 644 backedges. 49 proven. 594 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:15:34,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360138259] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:15:34,052 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:15:34,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 66 [2021-11-23 13:15:34,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070033284] [2021-11-23 13:15:34,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:15:34,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-23 13:15:34,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:15:34,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-23 13:15:34,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=4085, Unknown=0, NotChecked=0, Total=4290 [2021-11-23 13:15:34,054 INFO L87 Difference]: Start difference. First operand 453 states and 481 transitions. Second operand has 66 states, 66 states have (on average 4.878787878787879) internal successors, (322), 66 states have internal predecessors, (322), 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 13:15:35,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:15:35,905 INFO L93 Difference]: Finished difference Result 971 states and 1030 transitions. [2021-11-23 13:15:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-23 13:15:35,906 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.878787878787879) internal successors, (322), 66 states have internal predecessors, (322), 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 156 [2021-11-23 13:15:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:15:35,909 INFO L225 Difference]: With dead ends: 971 [2021-11-23 13:15:35,909 INFO L226 Difference]: Without dead ends: 971 [2021-11-23 13:15:35,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 276 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=542, Invalid=9160, Unknown=0, NotChecked=0, Total=9702 [2021-11-23 13:15:35,910 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 226 mSDsluCounter, 2615 mSDsCounter, 0 mSdLazyCounter, 1450 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 3633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2140 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:15:35,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 2685 Invalid, 3633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1450 Invalid, 0 Unknown, 2140 Unchecked, 0.6s Time] [2021-11-23 13:15:35,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-11-23 13:15:35,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 682. [2021-11-23 13:15:35,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 1.0734214390602055) internal successors, (731), 681 states have internal predecessors, (731), 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 13:15:35,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 731 transitions. [2021-11-23 13:15:35,921 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 731 transitions. Word has length 156 [2021-11-23 13:15:35,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:15:35,921 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 731 transitions. [2021-11-23 13:15:35,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.878787878787879) internal successors, (322), 66 states have internal predecessors, (322), 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 13:15:35,921 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 731 transitions. [2021-11-23 13:15:35,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-23 13:15:35,922 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:15:35,923 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:15:35,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-23 13:15:36,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:36,123 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:15:36,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:15:36,124 INFO L85 PathProgramCache]: Analyzing trace with hash 943202190, now seen corresponding path program 20 times [2021-11-23 13:15:36,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:15:36,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277015270] [2021-11-23 13:15:36,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:15:36,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:15:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:15:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 120 proven. 560 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:15:36,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:15:36,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277015270] [2021-11-23 13:15:36,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277015270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:15:36,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931470704] [2021-11-23 13:15:36,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 13:15:36,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:36,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:15:36,666 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:15:36,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-23 13:15:36,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 13:15:36,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:15:36,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-23 13:15:36,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:15:36,807 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:15:36,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:15:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 153 proven. 527 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:15:38,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:15:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 190 proven. 490 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 13:15:39,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931470704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:15:39,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:15:39,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2021-11-23 13:15:39,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513573546] [2021-11-23 13:15:39,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:15:39,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-23 13:15:39,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:15:39,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-23 13:15:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=4582, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 13:15:39,681 INFO L87 Difference]: Start difference. First operand 682 states and 731 transitions. Second operand has 73 states, 72 states have (on average 6.486111111111111) internal successors, (467), 73 states have internal predecessors, (467), 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 13:15:40,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:15:40,811 INFO L93 Difference]: Finished difference Result 976 states and 1044 transitions. [2021-11-23 13:15:40,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 13:15:40,812 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 6.486111111111111) internal successors, (467), 73 states have internal predecessors, (467), 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 160 [2021-11-23 13:15:40,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:15:40,815 INFO L225 Difference]: With dead ends: 976 [2021-11-23 13:15:40,815 INFO L226 Difference]: Without dead ends: 970 [2021-11-23 13:15:40,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1328, Invalid=6154, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 13:15:40,816 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 679 mSDsluCounter, 1605 mSDsCounter, 0 mSdLazyCounter, 1916 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1699 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 13:15:40,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 1699 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1916 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 13:15:40,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-11-23 13:15:40,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 695. [2021-11-23 13:15:40,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.0734870317002883) internal successors, (745), 694 states have internal predecessors, (745), 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 13:15:40,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 745 transitions. [2021-11-23 13:15:40,825 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 745 transitions. Word has length 160 [2021-11-23 13:15:40,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:15:40,825 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 745 transitions. [2021-11-23 13:15:40,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 6.486111111111111) internal successors, (467), 73 states have internal predecessors, (467), 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 13:15:40,825 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 745 transitions. [2021-11-23 13:15:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-23 13:15:40,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:15:40,827 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:15:40,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-23 13:15:41,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-23 13:15:41,027 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:15:41,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:15:41,028 INFO L85 PathProgramCache]: Analyzing trace with hash 788300492, now seen corresponding path program 21 times [2021-11-23 13:15:41,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:15:41,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652294568] [2021-11-23 13:15:41,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:15:41,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:15:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:15:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 49 proven. 594 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:41,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:15:41,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652294568] [2021-11-23 13:15:41,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652294568] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:15:41,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823279371] [2021-11-23 13:15:41,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 13:15:41,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:41,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:15:41,650 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:15:41,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-23 13:15:41,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 13:15:41,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:15:41,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-23 13:15:41,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:15:42,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:15:43,325 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-11-23 13:15:43,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-11-23 13:15:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 49 proven. 594 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:43,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:15:43,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:15:43,844 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 26 treesize of output 22 [2021-11-23 13:15:44,106 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 49 proven. 594 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:44,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823279371] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:15:44,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:15:44,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 64 [2021-11-23 13:15:44,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13371586] [2021-11-23 13:15:44,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:15:44,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-23 13:15:44,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:15:44,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-23 13:15:44,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3840, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 13:15:44,108 INFO L87 Difference]: Start difference. First operand 695 states and 745 transitions. Second operand has 64 states, 64 states have (on average 5.03125) internal successors, (322), 64 states have internal predecessors, (322), 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 13:15:46,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:15:46,956 INFO L93 Difference]: Finished difference Result 1163 states and 1232 transitions. [2021-11-23 13:15:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-23 13:15:46,956 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 5.03125) internal successors, (322), 64 states have internal predecessors, (322), 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 160 [2021-11-23 13:15:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:15:46,960 INFO L225 Difference]: With dead ends: 1163 [2021-11-23 13:15:46,960 INFO L226 Difference]: Without dead ends: 1163 [2021-11-23 13:15:46,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 283 SyntacticMatches, 4 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2520 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=648, Invalid=9252, Unknown=0, NotChecked=0, Total=9900 [2021-11-23 13:15:46,961 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 288 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 3535 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 2265 SdHoareTripleChecker+Invalid, 3768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 3535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-23 13:15:46,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 2265 Invalid, 3768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 3535 Invalid, 0 Unknown, 172 Unchecked, 1.5s Time] [2021-11-23 13:15:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-11-23 13:15:46,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 695. [2021-11-23 13:15:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 1.0734870317002883) internal successors, (745), 694 states have internal predecessors, (745), 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 13:15:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 745 transitions. [2021-11-23 13:15:46,970 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 745 transitions. Word has length 160 [2021-11-23 13:15:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:15:46,971 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 745 transitions. [2021-11-23 13:15:46,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 5.03125) internal successors, (322), 64 states have internal predecessors, (322), 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 13:15:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 745 transitions. [2021-11-23 13:15:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-23 13:15:46,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:15:46,973 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:15:47,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-23 13:15:47,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-23 13:15:47,187 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:15:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:15:47,187 INFO L85 PathProgramCache]: Analyzing trace with hash -689441972, now seen corresponding path program 22 times [2021-11-23 13:15:47,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:15:47,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547032587] [2021-11-23 13:15:47,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:15:47,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:15:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:15:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 49 proven. 594 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:47,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:15:47,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547032587] [2021-11-23 13:15:47,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547032587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:15:47,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345780153] [2021-11-23 13:15:47,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 13:15:47,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:15:47,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:15:47,775 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:15:47,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-23 13:15:47,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 13:15:47,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:15:47,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-23 13:15:47,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:15:47,888 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:15:47,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:15:48,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 13:15:50,136 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 24 treesize of output 18 [2021-11-23 13:15:50,350 INFO L354 Elim1Store]: treesize reduction 22, result has 40.5 percent of original size [2021-11-23 13:15:50,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 39 [2021-11-23 13:15:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 437 proven. 206 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:50,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:15:53,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:15:53,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 97 [2021-11-23 13:15:53,328 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 30 treesize of output 28 [2021-11-23 13:15:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 194 proven. 449 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:15:55,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345780153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:15:55,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:15:55,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 88 [2021-11-23 13:15:55,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768573884] [2021-11-23 13:15:55,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:15:55,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-23 13:15:55,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:15:55,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-23 13:15:55,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=7045, Unknown=0, NotChecked=0, Total=7656 [2021-11-23 13:15:55,281 INFO L87 Difference]: Start difference. First operand 695 states and 745 transitions. Second operand has 88 states, 88 states have (on average 5.034090909090909) internal successors, (443), 88 states have internal predecessors, (443), 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 13:16:07,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:16:07,043 INFO L93 Difference]: Finished difference Result 1305 states and 1382 transitions. [2021-11-23 13:16:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-23 13:16:07,044 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 5.034090909090909) internal successors, (443), 88 states have internal predecessors, (443), 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 160 [2021-11-23 13:16:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:16:07,048 INFO L225 Difference]: With dead ends: 1305 [2021-11-23 13:16:07,048 INFO L226 Difference]: Without dead ends: 1011 [2021-11-23 13:16:07,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 302 SyntacticMatches, 3 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9919 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=5900, Invalid=33106, Unknown=0, NotChecked=0, Total=39006 [2021-11-23 13:16:07,052 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 851 mSDsluCounter, 2107 mSDsCounter, 0 mSdLazyCounter, 3435 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 4497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 3435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 911 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 13:16:07,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 2168 Invalid, 4497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 3435 Invalid, 0 Unknown, 911 Unchecked, 1.9s Time] [2021-11-23 13:16:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-11-23 13:16:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 903. [2021-11-23 13:16:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 1.065410199556541) internal successors, (961), 902 states have internal predecessors, (961), 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 13:16:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 961 transitions. [2021-11-23 13:16:07,070 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 961 transitions. Word has length 160 [2021-11-23 13:16:07,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:16:07,070 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 961 transitions. [2021-11-23 13:16:07,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 5.034090909090909) internal successors, (443), 88 states have internal predecessors, (443), 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 13:16:07,071 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 961 transitions. [2021-11-23 13:16:07,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-23 13:16:07,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:16:07,074 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:16:07,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-23 13:16:07,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-23 13:16:07,280 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:16:07,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:16:07,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1552507316, now seen corresponding path program 23 times [2021-11-23 13:16:07,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:16:07,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681279261] [2021-11-23 13:16:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:16:07,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:16:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:16:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 49 proven. 594 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:16:08,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:16:08,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681279261] [2021-11-23 13:16:08,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681279261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:16:08,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345306058] [2021-11-23 13:16:08,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 13:16:08,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:16:08,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:16:08,058 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:16:08,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-23 13:16:08,302 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-23 13:16:08,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:16:08,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-23 13:16:08,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:16:08,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 13:16:09,783 INFO L354 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2021-11-23 13:16:09,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2021-11-23 13:16:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 49 proven. 594 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:16:09,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:16:10,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-23 13:16:10,198 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 26 treesize of output 22 [2021-11-23 13:16:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 49 proven. 594 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:16:10,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345306058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:16:10,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:16:10,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 57 [2021-11-23 13:16:10,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424405118] [2021-11-23 13:16:10,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:16:10,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-23 13:16:10,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:16:10,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-23 13:16:10,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3019, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 13:16:10,465 INFO L87 Difference]: Start difference. First operand 903 states and 961 transitions. Second operand has 57 states, 57 states have (on average 4.7368421052631575) internal successors, (270), 57 states have internal predecessors, (270), 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 13:16:13,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:16:13,104 INFO L93 Difference]: Finished difference Result 939 states and 996 transitions. [2021-11-23 13:16:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-23 13:16:13,104 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 4.7368421052631575) internal successors, (270), 57 states have internal predecessors, (270), 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 160 [2021-11-23 13:16:13,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:16:13,108 INFO L225 Difference]: With dead ends: 939 [2021-11-23 13:16:13,108 INFO L226 Difference]: Without dead ends: 939 [2021-11-23 13:16:13,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 290 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=616, Invalid=7040, Unknown=0, NotChecked=0, Total=7656 [2021-11-23 13:16:13,109 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 784 mSDsluCounter, 2384 mSDsCounter, 0 mSdLazyCounter, 2945 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 3247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 13:16:13,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [784 Valid, 2473 Invalid, 3247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2945 Invalid, 0 Unknown, 186 Unchecked, 1.4s Time] [2021-11-23 13:16:13,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-11-23 13:16:13,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 923. [2021-11-23 13:16:13,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 1.0639913232104121) internal successors, (981), 922 states have internal predecessors, (981), 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 13:16:13,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 981 transitions. [2021-11-23 13:16:13,122 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 981 transitions. Word has length 160 [2021-11-23 13:16:13,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:16:13,123 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 981 transitions. [2021-11-23 13:16:13,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 4.7368421052631575) internal successors, (270), 57 states have internal predecessors, (270), 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 13:16:13,123 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 981 transitions. [2021-11-23 13:16:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-23 13:16:13,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 13:16:13,125 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:16:13,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-23 13:16:13,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:16:13,331 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-23 13:16:13,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 13:16:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1729840076, now seen corresponding path program 24 times [2021-11-23 13:16:13,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 13:16:13,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146670021] [2021-11-23 13:16:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 13:16:13,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 13:16:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 13:16:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 49 proven. 594 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 13:16:14,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 13:16:14,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146670021] [2021-11-23 13:16:14,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146670021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 13:16:14,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283079651] [2021-11-23 13:16:14,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 13:16:14,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 13:16:14,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 13:16:14,099 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 13:16:14,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-23 13:16:14,475 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-23 13:16:14,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 13:16:14,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 13:16:14,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 13:16:14,508 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 13:16:14,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-23 13:16:14,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 13:16:16,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 13:16:16,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-23 13:16:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-23 13:16:16,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 13:16:17,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 29 [2021-11-23 13:16:17,864 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 37 treesize of output 35 [2021-11-23 13:16:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2021-11-23 13:16:18,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283079651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 13:16:18,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 13:16:18,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 8, 8] total 45 [2021-11-23 13:16:18,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999104342] [2021-11-23 13:16:18,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 13:16:18,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-23 13:16:18,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 13:16:18,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-23 13:16:18,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1861, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 13:16:18,174 INFO L87 Difference]: Start difference. First operand 923 states and 981 transitions. Second operand has 45 states, 45 states have (on average 5.155555555555556) internal successors, (232), 45 states have internal predecessors, (232), 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 13:16:20,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 13:16:20,912 INFO L93 Difference]: Finished difference Result 951 states and 1009 transitions. [2021-11-23 13:16:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-23 13:16:20,913 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 5.155555555555556) internal successors, (232), 45 states have internal predecessors, (232), 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 160 [2021-11-23 13:16:20,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 13:16:20,913 INFO L225 Difference]: With dead ends: 951 [2021-11-23 13:16:20,913 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 13:16:20,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3187 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=760, Invalid=11012, Unknown=0, NotChecked=0, Total=11772 [2021-11-23 13:16:20,914 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 67 mSDsluCounter, 1642 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 13:16:20,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 1703 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1161 Invalid, 0 Unknown, 273 Unchecked, 0.6s Time] [2021-11-23 13:16:20,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 13:16:20,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 13:16:20,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 13:16:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 13:16:20,916 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 160 [2021-11-23 13:16:20,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 13:16:20,916 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 13:16:20,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.155555555555556) internal successors, (232), 45 states have internal predecessors, (232), 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 13:16:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 13:16:20,917 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 13:16:20,919 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (18 of 19 remaining) [2021-11-23 13:16:20,920 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (17 of 19 remaining) [2021-11-23 13:16:20,920 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (16 of 19 remaining) [2021-11-23 13:16:20,920 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (15 of 19 remaining) [2021-11-23 13:16:20,920 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (14 of 19 remaining) [2021-11-23 13:16:20,920 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (13 of 19 remaining) [2021-11-23 13:16:20,921 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (12 of 19 remaining) [2021-11-23 13:16:20,921 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (11 of 19 remaining) [2021-11-23 13:16:20,921 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (10 of 19 remaining) [2021-11-23 13:16:20,921 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (9 of 19 remaining) [2021-11-23 13:16:20,921 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (8 of 19 remaining) [2021-11-23 13:16:20,921 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (7 of 19 remaining) [2021-11-23 13:16:20,921 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION (6 of 19 remaining) [2021-11-23 13:16:20,921 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION (5 of 19 remaining) [2021-11-23 13:16:20,921 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION (4 of 19 remaining) [2021-11-23 13:16:20,922 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION (3 of 19 remaining) [2021-11-23 13:16:20,922 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATION (2 of 19 remaining) [2021-11-23 13:16:20,922 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATION (1 of 19 remaining) [2021-11-23 13:16:20,922 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2021-11-23 13:16:20,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-23 13:16:21,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-23 13:16:21,126 INFO L732 BasicCegarLoop]: Path program histogram: [24, 6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 13:16:21,128 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 13:16:21,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 01:16:21 BoogieIcfgContainer [2021-11-23 13:16:21,131 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 13:16:21,132 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 13:16:21,132 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 13:16:21,132 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 13:16:21,133 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 01:12:28" (3/4) ... [2021-11-23 13:16:21,136 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 13:16:21,148 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-11-23 13:16:21,148 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-23 13:16:21,148 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 13:16:21,149 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 13:16:21,212 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/witness.graphml [2021-11-23 13:16:21,212 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 13:16:21,213 INFO L158 Benchmark]: Toolchain (without parser) took 234198.31ms. Allocated memory was 100.7MB in the beginning and 293.6MB in the end (delta: 192.9MB). Free memory was 64.6MB in the beginning and 144.9MB in the end (delta: -80.3MB). Peak memory consumption was 112.7MB. Max. memory is 16.1GB. [2021-11-23 13:16:21,213 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 100.7MB. Free memory was 73.7MB in the beginning and 73.7MB in the end (delta: 31.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 13:16:21,213 INFO L158 Benchmark]: CACSL2BoogieTranslator took 534.44ms. Allocated memory was 100.7MB in the beginning and 138.4MB in the end (delta: 37.7MB). Free memory was 64.3MB in the beginning and 106.7MB in the end (delta: -42.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 13:16:21,214 INFO L158 Benchmark]: Boogie Procedure Inliner took 91.31ms. Allocated memory is still 138.4MB. Free memory was 106.7MB in the beginning and 104.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:16:21,214 INFO L158 Benchmark]: Boogie Preprocessor took 54.44ms. Allocated memory is still 138.4MB. Free memory was 104.5MB in the beginning and 103.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 13:16:21,214 INFO L158 Benchmark]: RCFGBuilder took 579.39ms. Allocated memory is still 138.4MB. Free memory was 103.3MB in the beginning and 89.9MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 13:16:21,215 INFO L158 Benchmark]: TraceAbstraction took 232836.82ms. Allocated memory was 138.4MB in the beginning and 293.6MB in the end (delta: 155.2MB). Free memory was 89.4MB in the beginning and 148.4MB in the end (delta: -59.0MB). Peak memory consumption was 98.7MB. Max. memory is 16.1GB. [2021-11-23 13:16:21,215 INFO L158 Benchmark]: Witness Printer took 80.33ms. Allocated memory is still 293.6MB. Free memory was 148.4MB in the beginning and 144.9MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 13:16:21,216 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 100.7MB. Free memory was 73.7MB in the beginning and 73.7MB in the end (delta: 31.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 534.44ms. Allocated memory was 100.7MB in the beginning and 138.4MB in the end (delta: 37.7MB). Free memory was 64.3MB in the beginning and 106.7MB in the end (delta: -42.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 91.31ms. Allocated memory is still 138.4MB. Free memory was 106.7MB in the beginning and 104.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.44ms. Allocated memory is still 138.4MB. Free memory was 104.5MB in the beginning and 103.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 579.39ms. Allocated memory is still 138.4MB. Free memory was 103.3MB in the beginning and 89.9MB in the end (delta: 13.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 232836.82ms. Allocated memory was 138.4MB in the beginning and 293.6MB in the end (delta: 155.2MB). Free memory was 89.4MB in the beginning and 148.4MB in the end (delta: -59.0MB). Peak memory consumption was 98.7MB. Max. memory is 16.1GB. * Witness Printer took 80.33ms. Allocated memory is still 293.6MB. Free memory was 148.4MB in the beginning and 144.9MB in the end (delta: 3.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 541]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 550]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 550]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 551]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 524]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 527]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 52 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 232.8s, OverallIterations: 62, TraceHistogramMax: 11, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.1s, AutomataDifference: 91.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19735 SdHoareTripleChecker+Valid, 24.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19735 mSDsluCounter, 48404 SdHoareTripleChecker+Invalid, 20.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 8242 IncrementalHoareTripleChecker+Unchecked, 45507 mSDsCounter, 2500 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 51831 IncrementalHoareTripleChecker+Invalid, 62573 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2500 mSolverCounterUnsat, 2897 mSDtfsCounter, 51831 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11030 GetRequests, 7708 SyntacticMatches, 165 SemanticMatches, 3157 ConstructedPredicates, 0 IntricatePredicates, 27 DeprecatedPredicates, 74395 ImplicationChecksByTransitivity, 122.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=981occurred in iteration=54, InterpolantAutomatonStates: 1593, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 62 MinimizatonAttempts, 5033 StatesRemovedByMinimization, 52 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 4.7s SatisfiabilityAnalysisTime, 123.5s InterpolantComputationTime, 9004 NumberOfCodeBlocks, 8949 NumberOfCodeBlocksAsserted, 235 NumberOfCheckSat, 13200 ConstructedInterpolants, 1335 QuantifiedInterpolants, 164408 SizeOfPredicates, 751 NumberOfNonLiveVariables, 15489 ConjunctsInSsa, 2151 ConjunctsInUnsatCore, 149 InterpolantComputations, 19 PerfectInterpolantSequences, 10010/37328 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-23 13:16:21,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83dbe396-d671-4796-b1a2-d5eefee3d3bb/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE