./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa --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 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 22:45:55,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 22:45:55,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 22:45:55,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 22:45:55,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 22:45:55,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 22:45:55,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 22:45:55,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 22:45:55,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 22:45:55,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 22:45:55,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 22:45:55,758 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 22:45:55,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 22:45:55,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 22:45:55,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 22:45:55,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 22:45:55,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 22:45:55,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 22:45:55,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 22:45:55,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 22:45:55,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 22:45:55,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 22:45:55,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 22:45:55,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 22:45:55,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 22:45:55,779 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 22:45:55,779 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 22:45:55,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 22:45:55,781 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 22:45:55,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 22:45:55,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 22:45:55,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 22:45:55,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 22:45:55,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 22:45:55,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 22:45:55,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 22:45:55,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 22:45:55,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 22:45:55,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 22:45:55,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 22:45:55,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 22:45:55,788 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 22:45:55,805 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 22:45:55,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 22:45:55,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 22:45:55,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 22:45:55,806 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 22:45:55,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 22:45:55,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 22:45:55,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 22:45:55,806 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 22:45:55,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 22:45:55,807 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 22:45:55,807 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 22:45:55,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 22:45:55,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 22:45:55,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 22:45:55,807 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 22:45:55,807 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 22:45:55,807 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 22:45:55,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 22:45:55,808 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 22:45:55,808 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 22:45:55,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 22:45:55,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 22:45:55,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 22:45:55,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 22:45:55,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:45:55,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 22:45:55,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 22:45:55,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 22:45:55,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 22:45:55,809 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 22:45:55,809 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_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34ebd55fb329f5d1f91a7448416ebb87d44ad143bdc373b65c05d35b2199abdd [2021-12-06 22:45:55,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 22:45:56,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 22:45:56,009 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 22:45:56,010 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 22:45:56,010 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 22:45:56,011 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2021-12-06 22:45:56,052 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/data/f79eb6db4/ecf1035d3126448da31027d91463a726/FLAGb0627a26d [2021-12-06 22:45:56,520 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 22:45:56,521 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/sv-benchmarks/c/array-memsafety/openbsd_cstrcmp-alloca-1.i [2021-12-06 22:45:56,530 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/data/f79eb6db4/ecf1035d3126448da31027d91463a726/FLAGb0627a26d [2021-12-06 22:45:57,037 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/data/f79eb6db4/ecf1035d3126448da31027d91463a726 [2021-12-06 22:45:57,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 22:45:57,040 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 22:45:57,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 22:45:57,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 22:45:57,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 22:45:57,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:45:57" (1/1) ... [2021-12-06 22:45:57,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27db02db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:57, skipping insertion in model container [2021-12-06 22:45:57,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 10:45:57" (1/1) ... [2021-12-06 22:45:57,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 22:45:57,085 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 22:45:57,257 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:45:57,263 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 22:45:57,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 22:45:57,309 INFO L208 MainTranslator]: Completed translation [2021-12-06 22:45:57,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:57 WrapperNode [2021-12-06 22:45:57,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 22:45:57,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 22:45:57,310 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 22:45:57,310 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 22:45:57,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:57" (1/1) ... [2021-12-06 22:45:57,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:57" (1/1) ... [2021-12-06 22:45:57,342 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2021-12-06 22:45:57,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 22:45:57,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 22:45:57,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 22:45:57,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 22:45:57,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:57" (1/1) ... [2021-12-06 22:45:57,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:57" (1/1) ... [2021-12-06 22:45:57,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:57" (1/1) ... [2021-12-06 22:45:57,351 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:57" (1/1) ... [2021-12-06 22:45:57,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:57" (1/1) ... [2021-12-06 22:45:57,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:57" (1/1) ... [2021-12-06 22:45:57,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:57" (1/1) ... [2021-12-06 22:45:57,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 22:45:57,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 22:45:57,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 22:45:57,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 22:45:57,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:57" (1/1) ... [2021-12-06 22:45:57,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 22:45:57,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:45:57,392 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 22:45:57,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 22:45:57,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 22:45:57,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 22:45:57,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 22:45:57,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 22:45:57,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 22:45:57,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 22:45:57,497 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 22:45:57,499 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 22:45:57,657 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 22:45:57,663 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 22:45:57,663 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 22:45:57,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:45:57 BoogieIcfgContainer [2021-12-06 22:45:57,665 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 22:45:57,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 22:45:57,668 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 22:45:57,671 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 22:45:57,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 10:45:57" (1/3) ... [2021-12-06 22:45:57,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@528221c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:45:57, skipping insertion in model container [2021-12-06 22:45:57,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 10:45:57" (2/3) ... [2021-12-06 22:45:57,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@528221c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 10:45:57, skipping insertion in model container [2021-12-06 22:45:57,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:45:57" (3/3) ... [2021-12-06 22:45:57,674 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcmp-alloca-1.i [2021-12-06 22:45:57,679 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 22:45:57,679 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-12-06 22:45:57,723 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 22:45:57,729 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 [2021-12-06 22:45:57,729 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-12-06 22:45:57,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:45:57,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 22:45:57,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:57,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:57,749 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:45:57,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:57,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2021-12-06 22:45:57,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:57,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937295458] [2021-12-06 22:45:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:57,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:57,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:57,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937295458] [2021-12-06 22:45:57,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937295458] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:57,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:45:57,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:45:57,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846346859] [2021-12-06 22:45:57,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:57,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:45:57,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:57,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:45:57,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:45:57,951 INFO L87 Difference]: Start difference. First operand has 50 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 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) [2021-12-06 22:45:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:58,003 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2021-12-06 22:45:58,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:45:58,005 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 [2021-12-06 22:45:58,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:58,011 INFO L225 Difference]: With dead ends: 92 [2021-12-06 22:45:58,011 INFO L226 Difference]: Without dead ends: 88 [2021-12-06 22:45:58,012 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 [2021-12-06 22:45:58,016 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 44 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:58,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 142 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:45:58,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-06 22:45:58,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2021-12-06 22:45:58,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.78125) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:45:58,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-12-06 22:45:58,047 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 7 [2021-12-06 22:45:58,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:58,048 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-12-06 22:45:58,048 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) [2021-12-06 22:45:58,048 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-12-06 22:45:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 22:45:58,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:58,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:58,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 22:45:58,049 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:45:58,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:58,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2021-12-06 22:45:58,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:58,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200467985] [2021-12-06 22:45:58,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:58,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:58,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:58,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200467985] [2021-12-06 22:45:58,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200467985] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:58,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:45:58,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:45:58,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051375767] [2021-12-06 22:45:58,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:58,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:45:58,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:58,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:45:58,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:45:58,118 INFO L87 Difference]: Start difference. First operand 51 states and 57 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) [2021-12-06 22:45:58,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:58,147 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-12-06 22:45:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:45:58,148 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 [2021-12-06 22:45:58,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:58,149 INFO L225 Difference]: With dead ends: 49 [2021-12-06 22:45:58,149 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 22:45:58,149 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 [2021-12-06 22:45:58,151 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 41 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 35 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 [2021-12-06 22:45:58,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 35 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:45:58,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 22:45:58,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-12-06 22:45:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.71875) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:45:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-12-06 22:45:58,158 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 7 [2021-12-06 22:45:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:58,158 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-12-06 22:45:58,159 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) [2021-12-06 22:45:58,159 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-12-06 22:45:58,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-06 22:45:58,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:58,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:58,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 22:45:58,160 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:45:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:58,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2021-12-06 22:45:58,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:58,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998255606] [2021-12-06 22:45:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:58,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:58,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:58,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:58,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998255606] [2021-12-06 22:45:58,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998255606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:58,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:45:58,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:45:58,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779099146] [2021-12-06 22:45:58,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:58,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:45:58,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:58,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:45:58,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:45:58,235 INFO L87 Difference]: Start difference. First operand 49 states and 55 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) [2021-12-06 22:45:58,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:58,309 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2021-12-06 22:45:58,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:45:58,309 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 [2021-12-06 22:45:58,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:58,311 INFO L225 Difference]: With dead ends: 89 [2021-12-06 22:45:58,311 INFO L226 Difference]: Without dead ends: 89 [2021-12-06 22:45:58,311 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 [2021-12-06 22:45:58,313 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 44 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 82 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 [2021-12-06 22:45:58,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 82 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:45:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-06 22:45:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 51. [2021-12-06 22:45:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 50 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:45:58,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-12-06 22:45:58,320 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 7 [2021-12-06 22:45:58,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:58,320 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-12-06 22:45:58,320 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) [2021-12-06 22:45:58,320 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-12-06 22:45:58,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 22:45:58,321 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:58,321 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:58,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 22:45:58,321 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:45:58,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:58,322 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2021-12-06 22:45:58,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:58,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652497566] [2021-12-06 22:45:58,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:58,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:58,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:58,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652497566] [2021-12-06 22:45:58,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652497566] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:58,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:45:58,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:45:58,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170087136] [2021-12-06 22:45:58,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:58,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:45:58,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:58,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:45:58,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:45:58,371 INFO L87 Difference]: Start difference. First operand 51 states and 58 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) [2021-12-06 22:45:58,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:58,396 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-12-06 22:45:58,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:45:58,396 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 [2021-12-06 22:45:58,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:58,397 INFO L225 Difference]: With dead ends: 50 [2021-12-06 22:45:58,397 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 22:45:58,398 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 [2021-12-06 22:45:58,399 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:58,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 33 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:45:58,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 22:45:58,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-06 22:45:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:45:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-12-06 22:45:58,404 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 9 [2021-12-06 22:45:58,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:58,405 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-12-06 22:45:58,405 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) [2021-12-06 22:45:58,405 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-12-06 22:45:58,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 22:45:58,406 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:58,406 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:58,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 22:45:58,406 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:45:58,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:58,407 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2021-12-06 22:45:58,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:58,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955809595] [2021-12-06 22:45:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:58,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:58,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:58,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:58,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955809595] [2021-12-06 22:45:58,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955809595] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:58,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:45:58,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:45:58,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115703132] [2021-12-06 22:45:58,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:58,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:45:58,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:58,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:45:58,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:45:58,437 INFO L87 Difference]: Start difference. First operand 50 states and 57 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) [2021-12-06 22:45:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:58,451 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2021-12-06 22:45:58,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:45:58,451 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 [2021-12-06 22:45:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:58,452 INFO L225 Difference]: With dead ends: 90 [2021-12-06 22:45:58,452 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 22:45:58,453 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 [2021-12-06 22:45:58,454 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 66 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 94 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 [2021-12-06 22:45:58,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 94 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:45:58,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 22:45:58,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2021-12-06 22:45:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:45:58,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-12-06 22:45:58,460 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 9 [2021-12-06 22:45:58,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:58,461 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-12-06 22:45:58,461 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) [2021-12-06 22:45:58,461 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-12-06 22:45:58,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 22:45:58,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:58,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:58,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 22:45:58,462 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:45:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:58,463 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2021-12-06 22:45:58,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:58,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576551961] [2021-12-06 22:45:58,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:58,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:58,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:58,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576551961] [2021-12-06 22:45:58,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576551961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:58,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:45:58,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 22:45:58,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814306606] [2021-12-06 22:45:58,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:58,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 22:45:58,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 22:45:58,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 22:45:58,491 INFO L87 Difference]: Start difference. First operand 61 states and 71 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) [2021-12-06 22:45:58,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:58,507 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-12-06 22:45:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 22:45:58,507 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 [2021-12-06 22:45:58,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:58,508 INFO L225 Difference]: With dead ends: 59 [2021-12-06 22:45:58,508 INFO L226 Difference]: Without dead ends: 59 [2021-12-06 22:45:58,508 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 [2021-12-06 22:45:58,509 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 34 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 [2021-12-06 22:45:58,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:45:58,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-06 22:45:58,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-06 22:45:58,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:45:58,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-12-06 22:45:58,515 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 9 [2021-12-06 22:45:58,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:58,515 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-12-06 22:45:58,515 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) [2021-12-06 22:45:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-12-06 22:45:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-06 22:45:58,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:58,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:58,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 22:45:58,516 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:45:58,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:58,517 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2021-12-06 22:45:58,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:58,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526875237] [2021-12-06 22:45:58,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:58,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:58,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:58,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:58,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526875237] [2021-12-06 22:45:58,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526875237] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:58,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:45:58,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:45:58,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210254303] [2021-12-06 22:45:58,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:58,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:45:58,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:58,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:45:58,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:45:58,567 INFO L87 Difference]: Start difference. First operand 59 states and 69 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) [2021-12-06 22:45:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:58,618 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2021-12-06 22:45:58,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:45:58,618 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 [2021-12-06 22:45:58,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:58,619 INFO L225 Difference]: With dead ends: 90 [2021-12-06 22:45:58,619 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 22:45:58,620 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 [2021-12-06 22:45:58,620 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 74 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:58,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 76 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:45:58,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 22:45:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2021-12-06 22:45:58,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.5319148936170213) 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) [2021-12-06 22:45:58,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2021-12-06 22:45:58,631 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 9 [2021-12-06 22:45:58,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:58,631 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2021-12-06 22:45:58,631 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) [2021-12-06 22:45:58,632 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2021-12-06 22:45:58,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 22:45:58,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:58,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:58,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 22:45:58,632 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:45:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:58,633 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2021-12-06 22:45:58,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:58,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25662147] [2021-12-06 22:45:58,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:58,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:58,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:58,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25662147] [2021-12-06 22:45:58,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25662147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:58,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:45:58,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:45:58,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499421844] [2021-12-06 22:45:58,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:58,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:45:58,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:58,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:45:58,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:45:58,664 INFO L87 Difference]: Start difference. First operand 61 states and 72 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) [2021-12-06 22:45:58,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:58,688 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-12-06 22:45:58,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:45:58,688 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 [2021-12-06 22:45:58,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:58,688 INFO L225 Difference]: With dead ends: 60 [2021-12-06 22:45:58,688 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 22:45:58,689 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 [2021-12-06 22:45:58,689 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 41 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 33 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 [2021-12-06 22:45:58,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 33 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:45:58,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 22:45:58,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-06 22:45:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:45:58,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-12-06 22:45:58,693 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 10 [2021-12-06 22:45:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:58,693 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-12-06 22:45:58,693 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) [2021-12-06 22:45:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-12-06 22:45:58,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 22:45:58,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:58,694 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:58,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 22:45:58,694 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:45:58,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:58,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2021-12-06 22:45:58,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:58,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811873624] [2021-12-06 22:45:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:58,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:58,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:58,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:58,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811873624] [2021-12-06 22:45:58,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811873624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:45:58,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913342966] [2021-12-06 22:45:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:58,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:58,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:45:58,758 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:45:58,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 22:45:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:58,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 22:45:58,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:45:58,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:45:58,864 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 [2021-12-06 22:45:58,870 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 [2021-12-06 22:45:58,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:58,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:45:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:59,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913342966] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:45:59,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:45:59,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-06 22:45:59,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119456676] [2021-12-06 22:45:59,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:45:59,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:45:59,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:59,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:45:59,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:45:59,083 INFO L87 Difference]: Start difference. First operand 60 states and 71 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) [2021-12-06 22:45:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:59,229 INFO L93 Difference]: Finished difference Result 137 states and 155 transitions. [2021-12-06 22:45:59,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-06 22:45:59,230 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 [2021-12-06 22:45:59,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:59,231 INFO L225 Difference]: With dead ends: 137 [2021-12-06 22:45:59,231 INFO L226 Difference]: Without dead ends: 137 [2021-12-06 22:45:59,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:45:59,232 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 141 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:59,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 224 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:45:59,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-06 22:45:59,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 55. [2021-12-06 22:45:59,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 54 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) [2021-12-06 22:45:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-12-06 22:45:59,238 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 11 [2021-12-06 22:45:59,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:59,238 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-12-06 22:45:59,238 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) [2021-12-06 22:45:59,238 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-12-06 22:45:59,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 22:45:59,239 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:59,239 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:59,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 22:45:59,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:59,440 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:45:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:59,441 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2021-12-06 22:45:59,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:59,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740737022] [2021-12-06 22:45:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:59,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:59,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:59,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740737022] [2021-12-06 22:45:59,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740737022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:59,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:45:59,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:45:59,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013321629] [2021-12-06 22:45:59,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:59,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:45:59,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:59,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:45:59,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:45:59,497 INFO L87 Difference]: Start difference. First operand 55 states and 63 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) [2021-12-06 22:45:59,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:59,550 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-12-06 22:45:59,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:45:59,550 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 [2021-12-06 22:45:59,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:59,551 INFO L225 Difference]: With dead ends: 72 [2021-12-06 22:45:59,551 INFO L226 Difference]: Without dead ends: 72 [2021-12-06 22:45:59,551 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 [2021-12-06 22:45:59,552 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 122 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:45:59,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 59 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:45:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-12-06 22:45:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-12-06 22:45:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 59 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) [2021-12-06 22:45:59,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-12-06 22:45:59,557 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 12 [2021-12-06 22:45:59,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:59,557 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-12-06 22:45:59,558 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) [2021-12-06 22:45:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-12-06 22:45:59,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 22:45:59,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:59,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:59,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-06 22:45:59,559 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:45:59,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:59,559 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2021-12-06 22:45:59,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:59,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545648331] [2021-12-06 22:45:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:59,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:59,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:59,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545648331] [2021-12-06 22:45:59,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545648331] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:45:59,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:45:59,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 22:45:59,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81945899] [2021-12-06 22:45:59,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:45:59,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 22:45:59,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:59,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 22:45:59,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 22:45:59,585 INFO L87 Difference]: Start difference. First operand 60 states and 73 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) [2021-12-06 22:45:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:45:59,607 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2021-12-06 22:45:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:45:59,608 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 [2021-12-06 22:45:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:45:59,608 INFO L225 Difference]: With dead ends: 58 [2021-12-06 22:45:59,608 INFO L226 Difference]: Without dead ends: 58 [2021-12-06 22:45:59,609 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 [2021-12-06 22:45:59,610 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 45 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 [2021-12-06 22:45:59,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 45 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:45:59,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-06 22:45:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-06 22:45:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 48 states have (on average 1.4375) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:45:59,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-12-06 22:45:59,614 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 12 [2021-12-06 22:45:59,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:45:59,614 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-12-06 22:45:59,614 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) [2021-12-06 22:45:59,614 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-12-06 22:45:59,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 22:45:59,615 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:45:59,615 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:45:59,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-06 22:45:59,615 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:45:59,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:45:59,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2021-12-06 22:45:59,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:45:59,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903260866] [2021-12-06 22:45:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:59,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:45:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:59,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:45:59,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903260866] [2021-12-06 22:45:59,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903260866] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:45:59,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536093973] [2021-12-06 22:45:59,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:45:59,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:45:59,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:45:59,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:45:59,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 22:45:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:45:59,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 22:45:59,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:45:59,732 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:45:59,732 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 [2021-12-06 22:45:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:59,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:45:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:45:59,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536093973] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:45:59,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:45:59,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-12-06 22:45:59,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366808932] [2021-12-06 22:45:59,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:45:59,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 22:45:59,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:45:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 22:45:59,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:45:59,950 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:00,061 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2021-12-06 22:46:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:46:00,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2021-12-06 22:46:00,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:00,062 INFO L225 Difference]: With dead ends: 118 [2021-12-06 22:46:00,062 INFO L226 Difference]: Without dead ends: 118 [2021-12-06 22:46:00,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:46:00,063 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 237 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:00,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 157 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:46:00,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-06 22:46:00,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 55. [2021-12-06 22:46:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.4130434782608696) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2021-12-06 22:46:00,067 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 13 [2021-12-06 22:46:00,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:00,067 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2021-12-06 22:46:00,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,067 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2021-12-06 22:46:00,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 22:46:00,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:00,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:00,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 22:46:00,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 22:46:00,269 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:00,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:00,271 INFO L85 PathProgramCache]: Analyzing trace with hash 172810975, now seen corresponding path program 1 times [2021-12-06 22:46:00,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:00,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516417612] [2021-12-06 22:46:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:00,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:00,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:00,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:00,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516417612] [2021-12-06 22:46:00,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516417612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:46:00,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:46:00,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:46:00,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087788920] [2021-12-06 22:46:00,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:46:00,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:46:00,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:00,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:46:00,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:46:00,396 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:00,445 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2021-12-06 22:46:00,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:46:00,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 22:46:00,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:00,446 INFO L225 Difference]: With dead ends: 54 [2021-12-06 22:46:00,446 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 22:46:00,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:46:00,446 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:00,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 63 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:46:00,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 22:46:00,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-06 22:46:00,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3695652173913044) 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) [2021-12-06 22:46:00,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-12-06 22:46:00,448 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2021-12-06 22:46:00,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:00,448 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-12-06 22:46:00,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,449 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-12-06 22:46:00,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 22:46:00,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:00,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:00,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-06 22:46:00,449 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:00,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:00,450 INFO L85 PathProgramCache]: Analyzing trace with hash 172810976, now seen corresponding path program 1 times [2021-12-06 22:46:00,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:00,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948811683] [2021-12-06 22:46:00,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:00,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:00,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:00,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948811683] [2021-12-06 22:46:00,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948811683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:46:00,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:46:00,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 22:46:00,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419039952] [2021-12-06 22:46:00,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:46:00,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 22:46:00,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:00,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 22:46:00,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 22:46:00,491 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:00,543 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-12-06 22:46:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:46:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 22:46:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:00,543 INFO L225 Difference]: With dead ends: 54 [2021-12-06 22:46:00,543 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 22:46:00,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:46:00,544 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:00,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 74 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:46:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 22:46:00,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-12-06 22:46:00,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 53 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) [2021-12-06 22:46:00,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-12-06 22:46:00,547 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 14 [2021-12-06 22:46:00,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:00,547 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-12-06 22:46:00,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,547 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-12-06 22:46:00,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 22:46:00,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:00,548 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:00,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 22:46:00,548 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:00,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:00,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1432376192, now seen corresponding path program 1 times [2021-12-06 22:46:00,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:00,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127665287] [2021-12-06 22:46:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:00,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:00,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:00,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127665287] [2021-12-06 22:46:00,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127665287] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:46:00,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:46:00,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:46:00,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354821993] [2021-12-06 22:46:00,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:46:00,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:46:00,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:00,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:46:00,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:46:00,575 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:00,604 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-12-06 22:46:00,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:46:00,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 22:46:00,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:00,605 INFO L225 Difference]: With dead ends: 53 [2021-12-06 22:46:00,605 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 22:46:00,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:46:00,606 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:00,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 61 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:46:00,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 22:46:00,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-06 22:46:00,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.326086956521739) 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) [2021-12-06 22:46:00,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-06 22:46:00,608 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2021-12-06 22:46:00,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:00,608 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-06 22:46:00,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,608 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-06 22:46:00,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 22:46:00,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:00,609 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:00,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-06 22:46:00,609 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:00,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1432376191, now seen corresponding path program 1 times [2021-12-06 22:46:00,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:00,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549278504] [2021-12-06 22:46:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:00,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:00,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:00,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549278504] [2021-12-06 22:46:00,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549278504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:46:00,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:46:00,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 22:46:00,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817119181] [2021-12-06 22:46:00,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:46:00,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 22:46:00,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:00,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 22:46:00,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:46:00,664 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:00,714 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-12-06 22:46:00,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:46:00,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 22:46:00,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:00,715 INFO L225 Difference]: With dead ends: 63 [2021-12-06 22:46:00,715 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 22:46:00,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-12-06 22:46:00,716 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 148 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:00,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 76 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:46:00,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 22:46:00,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2021-12-06 22:46:00,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 47 states have (on average 1.3191489361702127) internal successors, (62), 53 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) [2021-12-06 22:46:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2021-12-06 22:46:00,718 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 16 [2021-12-06 22:46:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:00,718 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2021-12-06 22:46:00,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2021-12-06 22:46:00,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 22:46:00,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:00,719 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:00,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-06 22:46:00,719 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:00,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:00,720 INFO L85 PathProgramCache]: Analyzing trace with hash -2124032946, now seen corresponding path program 1 times [2021-12-06 22:46:00,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:00,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007968526] [2021-12-06 22:46:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:00,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:00,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:00,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007968526] [2021-12-06 22:46:00,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007968526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:46:00,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:46:00,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:46:00,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950671110] [2021-12-06 22:46:00,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:46:00,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:46:00,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:00,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:46:00,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:46:00,746 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:00,773 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2021-12-06 22:46:00,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 22:46:00,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 22:46:00,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:00,773 INFO L225 Difference]: With dead ends: 53 [2021-12-06 22:46:00,773 INFO L226 Difference]: Without dead ends: 53 [2021-12-06 22:46:00,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 22:46:00,774 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:00,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 64 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:46:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-06 22:46:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-06 22:46:00,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.297872340425532) 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) [2021-12-06 22:46:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-06 22:46:00,776 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 18 [2021-12-06 22:46:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:00,776 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-06 22:46:00,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-06 22:46:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 22:46:00,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:00,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:00,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-06 22:46:00,777 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:00,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:00,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2124032945, now seen corresponding path program 1 times [2021-12-06 22:46:00,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:00,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211543073] [2021-12-06 22:46:00,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:00,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:00,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:00,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:00,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211543073] [2021-12-06 22:46:00,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211543073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:46:00,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:46:00,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 22:46:00,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758244499] [2021-12-06 22:46:00,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:46:00,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:46:00,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:00,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:46:00,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:46:00,844 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:00,943 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2021-12-06 22:46:00,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:46:00,943 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 22:46:00,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:00,944 INFO L225 Difference]: With dead ends: 62 [2021-12-06 22:46:00,944 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 22:46:00,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:46:00,945 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:00,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 108 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:46:00,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 22:46:00,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-12-06 22:46:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 54 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) [2021-12-06 22:46:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2021-12-06 22:46:00,948 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 18 [2021-12-06 22:46:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:00,948 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2021-12-06 22:46:00,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2021-12-06 22:46:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 22:46:00,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:00,949 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:00,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-06 22:46:00,949 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:00,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:00,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2123984178, now seen corresponding path program 1 times [2021-12-06 22:46:00,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:00,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940662278] [2021-12-06 22:46:00,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:00,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:01,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:01,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940662278] [2021-12-06 22:46:01,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940662278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:46:01,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:46:01,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 22:46:01,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848162614] [2021-12-06 22:46:01,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:46:01,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 22:46:01,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:01,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 22:46:01,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-06 22:46:01,037 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:01,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:01,105 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-12-06 22:46:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 22:46:01,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 22:46:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:01,106 INFO L225 Difference]: With dead ends: 81 [2021-12-06 22:46:01,106 INFO L226 Difference]: Without dead ends: 81 [2021-12-06 22:46:01,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-12-06 22:46:01,107 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 42 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:01,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 196 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:46:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-06 22:46:01,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2021-12-06 22:46:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.2461538461538462) internal successors, (81), 70 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-12-06 22:46:01,110 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 18 [2021-12-06 22:46:01,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:01,111 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-12-06 22:46:01,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:01,111 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-12-06 22:46:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 22:46:01,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:01,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:01,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-06 22:46:01,112 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:01,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1149914764, now seen corresponding path program 1 times [2021-12-06 22:46:01,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:01,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448074495] [2021-12-06 22:46:01,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:01,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:01,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:01,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448074495] [2021-12-06 22:46:01,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448074495] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:46:01,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:46:01,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 22:46:01,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642308743] [2021-12-06 22:46:01,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:46:01,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 22:46:01,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:01,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 22:46:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-06 22:46:01,218 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:01,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:01,351 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-12-06 22:46:01,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:46:01,352 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 22:46:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:01,353 INFO L225 Difference]: With dead ends: 105 [2021-12-06 22:46:01,353 INFO L226 Difference]: Without dead ends: 105 [2021-12-06 22:46:01,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-12-06 22:46:01,354 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 118 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:01,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 177 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:46:01,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-06 22:46:01,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 73. [2021-12-06 22:46:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 72 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:01,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2021-12-06 22:46:01,357 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 18 [2021-12-06 22:46:01,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:01,357 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2021-12-06 22:46:01,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:01,358 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2021-12-06 22:46:01,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 22:46:01,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:01,358 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:01,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-06 22:46:01,359 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:01,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:01,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1419000974, now seen corresponding path program 1 times [2021-12-06 22:46:01,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:01,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910317848] [2021-12-06 22:46:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:01,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:01,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:01,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910317848] [2021-12-06 22:46:01,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910317848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:46:01,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:46:01,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 22:46:01,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063617480] [2021-12-06 22:46:01,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:46:01,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:46:01,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:01,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:46:01,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:46:01,427 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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) [2021-12-06 22:46:01,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:01,446 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2021-12-06 22:46:01,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 22:46:01,447 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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 [2021-12-06 22:46:01,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:01,447 INFO L225 Difference]: With dead ends: 72 [2021-12-06 22:46:01,447 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 22:46:01,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-06 22:46:01,448 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 33 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:01,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 58 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:46:01,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 22:46:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-06 22:46:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.225) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-12-06 22:46:01,450 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 19 [2021-12-06 22:46:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:01,450 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-12-06 22:46:01,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 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) [2021-12-06 22:46:01,450 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-12-06 22:46:01,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-06 22:46:01,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:01,451 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] [2021-12-06 22:46:01,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-06 22:46:01,451 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:01,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:01,451 INFO L85 PathProgramCache]: Analyzing trace with hash 453336425, now seen corresponding path program 1 times [2021-12-06 22:46:01,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:01,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049139263] [2021-12-06 22:46:01,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:01,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:01,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:01,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049139263] [2021-12-06 22:46:01,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049139263] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:01,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902674276] [2021-12-06 22:46:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:01,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:01,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:01,522 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:01,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 22:46:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:01,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 22:46:01,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:01,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:01,582 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 [2021-12-06 22:46:01,586 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 [2021-12-06 22:46:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:01,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:01,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902674276] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:01,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:01,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2021-12-06 22:46:01,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494396347] [2021-12-06 22:46:01,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:01,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 22:46:01,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:01,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 22:46:01,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-12-06 22:46:01,808 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:01,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:01,969 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2021-12-06 22:46:01,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 22:46:01,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 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 [2021-12-06 22:46:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:01,970 INFO L225 Difference]: With dead ends: 60 [2021-12-06 22:46:01,970 INFO L226 Difference]: Without dead ends: 60 [2021-12-06 22:46:01,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:46:01,971 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 166 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:01,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 123 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:46:01,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-06 22:46:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2021-12-06 22:46:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-06 22:46:01,972 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 22 [2021-12-06 22:46:01,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:01,973 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-06 22:46:01,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-06 22:46:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 22:46:01,973 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:01,973 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:01,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 22:46:02,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-06 22:46:02,175 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:02,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:02,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1864607690, now seen corresponding path program 1 times [2021-12-06 22:46:02,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:02,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837072944] [2021-12-06 22:46:02,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:02,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:02,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:02,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837072944] [2021-12-06 22:46:02,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837072944] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:46:02,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:46:02,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-06 22:46:02,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153407821] [2021-12-06 22:46:02,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:46:02,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 22:46:02,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:02,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 22:46:02,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-06 22:46:02,331 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:02,435 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-12-06 22:46:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:46:02,435 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-06 22:46:02,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:02,435 INFO L225 Difference]: With dead ends: 55 [2021-12-06 22:46:02,435 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 22:46:02,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-12-06 22:46:02,436 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:02,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 183 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:46:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 22:46:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-06 22:46:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-12-06 22:46:02,437 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 24 [2021-12-06 22:46:02,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:02,438 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-12-06 22:46:02,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:02,438 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-12-06 22:46:02,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 22:46:02,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:02,438 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:02,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-06 22:46:02,438 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:02,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2007657780, now seen corresponding path program 1 times [2021-12-06 22:46:02,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:02,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334967409] [2021-12-06 22:46:02,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:02,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:02,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:02,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334967409] [2021-12-06 22:46:02,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334967409] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:46:02,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 22:46:02,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-06 22:46:02,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508505345] [2021-12-06 22:46:02,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:46:02,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 22:46:02,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:02,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 22:46:02,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-06 22:46:02,582 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:02,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:02,682 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-12-06 22:46:02,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:46:02,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 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 24 [2021-12-06 22:46:02,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:02,682 INFO L225 Difference]: With dead ends: 51 [2021-12-06 22:46:02,683 INFO L226 Difference]: Without dead ends: 42 [2021-12-06 22:46:02,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:46:02,683 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 55 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:02,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 162 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:46:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-06 22:46:02,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2021-12-06 22:46:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:02,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-12-06 22:46:02,686 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 24 [2021-12-06 22:46:02,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:02,686 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-12-06 22:46:02,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:02,686 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-12-06 22:46:02,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-06 22:46:02,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:02,687 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:02,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-06 22:46:02,687 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:02,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:02,687 INFO L85 PathProgramCache]: Analyzing trace with hash 2045741993, now seen corresponding path program 1 times [2021-12-06 22:46:02,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:02,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364539812] [2021-12-06 22:46:02,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:02,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:02,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:02,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364539812] [2021-12-06 22:46:02,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364539812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:02,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753882584] [2021-12-06 22:46:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:02,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:02,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:02,776 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:02,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 22:46:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:02,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 22:46:02,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:02,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:02,999 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 [2021-12-06 22:46:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:03,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753882584] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:03,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:03,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2021-12-06 22:46:03,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528546659] [2021-12-06 22:46:03,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:03,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:46:03,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:03,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:46:03,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:46:03,018 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 20 states, 19 states have (on average 3.0) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:03,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:03,227 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-12-06 22:46:03,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:46:03,227 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 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 28 [2021-12-06 22:46:03,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:03,228 INFO L225 Difference]: With dead ends: 45 [2021-12-06 22:46:03,228 INFO L226 Difference]: Without dead ends: 45 [2021-12-06 22:46:03,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2021-12-06 22:46:03,228 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 132 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:03,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 176 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:46:03,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-06 22:46:03,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-12-06 22:46:03,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:03,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-12-06 22:46:03,231 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2021-12-06 22:46:03,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:03,231 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-12-06 22:46:03,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:03,231 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-12-06 22:46:03,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-06 22:46:03,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:03,232 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:03,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 22:46:03,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-06 22:46:03,433 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:03,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:03,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1136965878, now seen corresponding path program 1 times [2021-12-06 22:46:03,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:03,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261778050] [2021-12-06 22:46:03,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:03,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 22:46:03,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:03,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261778050] [2021-12-06 22:46:03,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261778050] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:03,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502594273] [2021-12-06 22:46:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:03,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:03,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:03,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:03,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 22:46:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:03,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 22:46:03,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:03,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:03,593 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 [2021-12-06 22:46:03,596 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 [2021-12-06 22:46:03,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:03,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:03,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502594273] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:03,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:03,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2021-12-06 22:46:03,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534677812] [2021-12-06 22:46:03,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:03,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 22:46:03,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:03,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 22:46:03,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-12-06 22:46:03,873 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 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) [2021-12-06 22:46:04,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:04,077 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-12-06 22:46:04,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:46:04,077 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 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) Word has length 30 [2021-12-06 22:46:04,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:04,077 INFO L225 Difference]: With dead ends: 47 [2021-12-06 22:46:04,077 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 22:46:04,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-06 22:46:04,078 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 134 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:04,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 178 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:46:04,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 22:46:04,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2021-12-06 22:46:04,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-12-06 22:46:04,080 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2021-12-06 22:46:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:04,080 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-12-06 22:46:04,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.315789473684211) internal successors, (82), 20 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) [2021-12-06 22:46:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-12-06 22:46:04,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 22:46:04,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:04,080 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] [2021-12-06 22:46:04,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 22:46:04,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-06 22:46:04,282 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:04,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:04,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1702563688, now seen corresponding path program 1 times [2021-12-06 22:46:04,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:04,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409493412] [2021-12-06 22:46:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:04,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:04,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:04,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409493412] [2021-12-06 22:46:04,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409493412] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:04,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958855967] [2021-12-06 22:46:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:04,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:04,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:04,403 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:04,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 22:46:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:04,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 22:46:04,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:04,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:04,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:04,653 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 [2021-12-06 22:46:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:04,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958855967] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:04,673 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:04,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2021-12-06 22:46:04,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67868409] [2021-12-06 22:46:04,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:04,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-06 22:46:04,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:04,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-06 22:46:04,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-12-06 22:46:04,674 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:04,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:04,881 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-12-06 22:46:04,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:46:04,882 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 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 32 [2021-12-06 22:46:04,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:04,882 INFO L225 Difference]: With dead ends: 52 [2021-12-06 22:46:04,882 INFO L226 Difference]: Without dead ends: 49 [2021-12-06 22:46:04,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2021-12-06 22:46:04,883 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 160 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:04,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 176 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:46:04,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-06 22:46:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-12-06 22:46:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 38 states have (on average 1.131578947368421) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-12-06 22:46:04,884 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2021-12-06 22:46:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:04,885 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-12-06 22:46:04,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-12-06 22:46:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 22:46:04,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:04,885 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 22:46:04,904 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 22:46:05,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:05,087 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:05,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1702514921, now seen corresponding path program 1 times [2021-12-06 22:46:05,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:05,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350546071] [2021-12-06 22:46:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:05,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:05,266 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:05,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:05,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350546071] [2021-12-06 22:46:05,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350546071] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:05,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380885121] [2021-12-06 22:46:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:05,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:05,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:05,267 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:05,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 22:46:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:05,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 22:46:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:05,327 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 [2021-12-06 22:46:05,440 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 14 treesize of output 10 [2021-12-06 22:46:05,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:46:05,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:46:05,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:05,811 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 18 treesize of output 10 [2021-12-06 22:46:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:05,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:05,928 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_337 (Array Int Int)) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23| Int)) (or (< |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23| 0) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_337) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23| 1)) 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_23|))) is different from false [2021-12-06 22:46:05,936 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:05,936 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:46:05,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:05,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:46:05,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:46:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:06,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380885121] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:06,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:06,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 30 [2021-12-06 22:46:06,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410777341] [2021-12-06 22:46:06,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:06,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 22:46:06,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:06,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 22:46:06,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=719, Unknown=1, NotChecked=54, Total=870 [2021-12-06 22:46:06,221 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 30 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) [2021-12-06 22:46:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:06,447 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2021-12-06 22:46:06,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:46:06,448 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 30 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) Word has length 32 [2021-12-06 22:46:06,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:06,448 INFO L225 Difference]: With dead ends: 69 [2021-12-06 22:46:06,448 INFO L226 Difference]: Without dead ends: 48 [2021-12-06 22:46:06,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=1161, Unknown=1, NotChecked=70, Total=1406 [2021-12-06 22:46:06,449 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:06,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 329 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 182 Invalid, 0 Unknown, 160 Unchecked, 0.1s Time] [2021-12-06 22:46:06,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-06 22:46:06,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-12-06 22:46:06,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-12-06 22:46:06,450 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 32 [2021-12-06 22:46:06,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:06,451 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-12-06 22:46:06,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 30 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) [2021-12-06 22:46:06,451 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-12-06 22:46:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 22:46:06,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:06,451 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] [2021-12-06 22:46:06,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 22:46:06,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-06 22:46:06,652 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:06,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:06,652 INFO L85 PathProgramCache]: Analyzing trace with hash 956999220, now seen corresponding path program 2 times [2021-12-06 22:46:06,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:06,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830208581] [2021-12-06 22:46:06,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:06,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:06,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:06,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830208581] [2021-12-06 22:46:06,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830208581] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:06,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659407832] [2021-12-06 22:46:06,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:46:06,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:06,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:06,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:06,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 22:46:06,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:46:06,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:06,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-06 22:46:06,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:06,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:06,951 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 [2021-12-06 22:46:06,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:06,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659407832] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:06,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:06,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2021-12-06 22:46:06,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120954172] [2021-12-06 22:46:06,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:06,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 22:46:06,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:06,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 22:46:06,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-12-06 22:46:06,973 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 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) [2021-12-06 22:46:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:07,117 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-12-06 22:46:07,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 22:46:07,117 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 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) Word has length 36 [2021-12-06 22:46:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:07,118 INFO L225 Difference]: With dead ends: 56 [2021-12-06 22:46:07,118 INFO L226 Difference]: Without dead ends: 56 [2021-12-06 22:46:07,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-12-06 22:46:07,118 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 165 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:07,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 149 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:46:07,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-06 22:46:07,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2021-12-06 22:46:07,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-12-06 22:46:07,120 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 36 [2021-12-06 22:46:07,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:07,120 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-12-06 22:46:07,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.8) internal successors, (76), 21 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) [2021-12-06 22:46:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-12-06 22:46:07,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-06 22:46:07,120 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:07,120 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:07,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 22:46:07,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-06 22:46:07,322 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:07,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:07,323 INFO L85 PathProgramCache]: Analyzing trace with hash 553249237, now seen corresponding path program 2 times [2021-12-06 22:46:07,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:07,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239228063] [2021-12-06 22:46:07,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:07,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:46:07,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:07,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239228063] [2021-12-06 22:46:07,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239228063] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:07,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590544173] [2021-12-06 22:46:07,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:46:07,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:07,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:07,507 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:07,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 22:46:07,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:46:07,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:07,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 22:46:07,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:07,691 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 14 treesize of output 10 [2021-12-06 22:46:07,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:46:07,984 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-06 22:46:07,985 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 28 treesize of output 13 [2021-12-06 22:46:07,989 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:46:07,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:14,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:14,863 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 103 treesize of output 103 [2021-12-06 22:46:14,871 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 40 treesize of output 36 [2021-12-06 22:46:14,895 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 7 treesize of output 3 [2021-12-06 22:46:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:46:14,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590544173] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:14,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:14,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 15] total 40 [2021-12-06 22:46:14,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510954260] [2021-12-06 22:46:14,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:14,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 22:46:14,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:14,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 22:46:14,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1393, Unknown=7, NotChecked=0, Total=1560 [2021-12-06 22:46:14,982 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:15,771 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-12-06 22:46:15,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-06 22:46:15,771 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 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 38 [2021-12-06 22:46:15,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:15,771 INFO L225 Difference]: With dead ends: 70 [2021-12-06 22:46:15,771 INFO L226 Difference]: Without dead ends: 55 [2021-12-06 22:46:15,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=216, Invalid=1756, Unknown=8, NotChecked=0, Total=1980 [2021-12-06 22:46:15,772 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:15,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 296 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 178 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2021-12-06 22:46:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-06 22:46:15,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-12-06 22:46:15,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:15,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-12-06 22:46:15,774 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 38 [2021-12-06 22:46:15,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:15,774 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-12-06 22:46:15,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:15,774 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-12-06 22:46:15,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 22:46:15,774 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:15,775 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:15,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 22:46:15,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:15,976 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:15,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2039282674, now seen corresponding path program 3 times [2021-12-06 22:46:15,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:15,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885620634] [2021-12-06 22:46:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:15,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:15,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:46:16,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:16,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885620634] [2021-12-06 22:46:16,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885620634] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:16,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841400146] [2021-12-06 22:46:16,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:46:16,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:16,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:16,091 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:16,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 22:46:16,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 22:46:16,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:16,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 22:46:16,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:16,269 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:46:16,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:16,378 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 7 treesize of output 5 [2021-12-06 22:46:16,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:46:16,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841400146] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:16,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:16,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-06 22:46:16,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067234527] [2021-12-06 22:46:16,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:16,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 22:46:16,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:16,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 22:46:16,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-12-06 22:46:16,401 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 26 states, 25 states have (on average 3.56) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:16,683 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2021-12-06 22:46:16,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 22:46:16,684 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.56) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 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 42 [2021-12-06 22:46:16,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:16,684 INFO L225 Difference]: With dead ends: 55 [2021-12-06 22:46:16,685 INFO L226 Difference]: Without dead ends: 55 [2021-12-06 22:46:16,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 22:46:16,686 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 266 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:16,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 188 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:46:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-06 22:46:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-12-06 22:46:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-12-06 22:46:16,688 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 42 [2021-12-06 22:46:16,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:16,688 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-12-06 22:46:16,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.56) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-12-06 22:46:16,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 22:46:16,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:16,689 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:16,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 22:46:16,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:16,890 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1309731743, now seen corresponding path program 2 times [2021-12-06 22:46:16,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:16,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348814352] [2021-12-06 22:46:16,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:16,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:46:17,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:17,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348814352] [2021-12-06 22:46:17,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348814352] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:17,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134310781] [2021-12-06 22:46:17,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:46:17,010 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:17,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:17,011 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:17,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 22:46:17,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-06 22:46:17,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:17,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 22:46:17,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-06 22:46:17,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 22:46:17,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134310781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 22:46:17,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 22:46:17,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 15 [2021-12-06 22:46:17,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735430744] [2021-12-06 22:46:17,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 22:46:17,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 22:46:17,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 22:46:17,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-12-06 22:46:17,113 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:17,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:17,138 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-12-06 22:46:17,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 22:46:17,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 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 46 [2021-12-06 22:46:17,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:17,139 INFO L225 Difference]: With dead ends: 53 [2021-12-06 22:46:17,139 INFO L226 Difference]: Without dead ends: 50 [2021-12-06 22:46:17,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-12-06 22:46:17,139 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:17,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 74 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 22:46:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-06 22:46:17,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-12-06 22:46:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:17,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-12-06 22:46:17,141 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2021-12-06 22:46:17,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:17,141 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-12-06 22:46:17,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:17,141 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-12-06 22:46:17,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-06 22:46:17,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:17,142 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:17,161 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 22:46:17,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-06 22:46:17,343 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:17,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1309682976, now seen corresponding path program 3 times [2021-12-06 22:46:17,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:17,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051738379] [2021-12-06 22:46:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:17,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:46:17,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:17,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051738379] [2021-12-06 22:46:17,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051738379] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:17,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240655926] [2021-12-06 22:46:17,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:46:17,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:17,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:17,506 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:17,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 22:46:17,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 22:46:17,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:17,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-06 22:46:17,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:17,588 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 [2021-12-06 22:46:17,592 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 [2021-12-06 22:46:17,782 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 14 treesize of output 10 [2021-12-06 22:46:17,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:46:17,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:46:18,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:46:18,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:18,157 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 17 treesize of output 10 [2021-12-06 22:46:18,159 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:18,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:18,375 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:18,375 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:46:18,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:18,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:46:18,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:46:18,661 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:46:18,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240655926] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:18,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:18,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 18] total 42 [2021-12-06 22:46:18,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590494451] [2021-12-06 22:46:18,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:18,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 22:46:18,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:18,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 22:46:18,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 22:46:18,663 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:18,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:18,834 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2021-12-06 22:46:18,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 22:46:18,834 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 0 states have call successors, (0), 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 46 [2021-12-06 22:46:18,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:18,835 INFO L225 Difference]: With dead ends: 88 [2021-12-06 22:46:18,835 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 22:46:18,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 22:46:18,836 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:18,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 350 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 232 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2021-12-06 22:46:18,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 22:46:18,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-12-06 22:46:18,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:18,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-12-06 22:46:18,837 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 46 [2021-12-06 22:46:18,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:18,837 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-12-06 22:46:18,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.6666666666666665) internal successors, (112), 42 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:18,838 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-12-06 22:46:18,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-06 22:46:18,838 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:18,838 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-06 22:46:18,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 22:46:19,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:19,039 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:19,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:19,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2060686141, now seen corresponding path program 4 times [2021-12-06 22:46:19,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:19,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090985501] [2021-12-06 22:46:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:19,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:19,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:46:19,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:19,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090985501] [2021-12-06 22:46:19,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090985501] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:19,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990979038] [2021-12-06 22:46:19,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:46:19,148 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:19,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:19,149 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:19,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 22:46:19,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:46:19,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:19,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-06 22:46:19,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:19,232 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:46:19,232 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 [2021-12-06 22:46:19,243 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 [2021-12-06 22:46:19,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:46:19,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:46:19,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:19,991 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 20 treesize of output 20 [2021-12-06 22:46:20,065 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:46:20,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:20,368 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_52| Int) (v_ArrVal_552 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_52|) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_52| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_552) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_52|)) 0) (< |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_52| 0))) is different from false [2021-12-06 22:46:20,376 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:20,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:46:20,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:20,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:46:20,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:46:20,875 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 22:46:20,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990979038] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:20,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:20,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 37 [2021-12-06 22:46:20,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791118034] [2021-12-06 22:46:20,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:20,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 22:46:20,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:20,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 22:46:20,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1178, Unknown=1, NotChecked=70, Total=1406 [2021-12-06 22:46:20,876 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 38 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 38 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:21,500 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2021-12-06 22:46:21,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-06 22:46:21,500 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 38 states have internal predecessors, (130), 0 states have call successors, (0), 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 50 [2021-12-06 22:46:21,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:21,501 INFO L225 Difference]: With dead ends: 66 [2021-12-06 22:46:21,501 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 22:46:21,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=336, Invalid=2319, Unknown=1, NotChecked=100, Total=2756 [2021-12-06 22:46:21,502 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:21,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 278 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 208 Invalid, 0 Unknown, 162 Unchecked, 0.1s Time] [2021-12-06 22:46:21,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 22:46:21,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-12-06 22:46:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 63 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) [2021-12-06 22:46:21,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2021-12-06 22:46:21,503 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 50 [2021-12-06 22:46:21,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:21,504 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2021-12-06 22:46:21,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 3.5135135135135136) internal successors, (130), 38 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:21,504 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2021-12-06 22:46:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-06 22:46:21,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:21,504 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:21,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 22:46:21,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:21,705 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:21,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:21,706 INFO L85 PathProgramCache]: Analyzing trace with hash 339458206, now seen corresponding path program 4 times [2021-12-06 22:46:21,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:21,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257365510] [2021-12-06 22:46:21,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:21,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:22,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:22,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257365510] [2021-12-06 22:46:22,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257365510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:22,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906381386] [2021-12-06 22:46:22,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:46:22,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:22,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:22,020 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:22,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 22:46:22,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:46:22,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:22,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 77 conjunts are in the unsatisfiable core [2021-12-06 22:46:22,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:22,090 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:46:22,090 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 [2021-12-06 22:46:22,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:46:22,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:46:22,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:46:22,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:46:22,713 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-12-06 22:46:22,713 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 28 treesize of output 13 [2021-12-06 22:46:22,717 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:46:22,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:23,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:23,241 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 99 treesize of output 99 [2021-12-06 22:46:23,251 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 34 treesize of output 32 [2021-12-06 22:46:23,287 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 7 treesize of output 3 [2021-12-06 22:46:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:46:23,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906381386] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:23,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:23,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 52 [2021-12-06 22:46:23,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443341886] [2021-12-06 22:46:23,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:23,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-12-06 22:46:23,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:23,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-12-06 22:46:23,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2458, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 22:46:23,636 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 52 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 52 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:24,402 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2021-12-06 22:46:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:46:24,402 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 52 states have internal predecessors, (123), 0 states have call successors, (0), 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 52 [2021-12-06 22:46:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:24,402 INFO L225 Difference]: With dead ends: 95 [2021-12-06 22:46:24,402 INFO L226 Difference]: Without dead ends: 74 [2021-12-06 22:46:24,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1342 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=427, Invalid=5123, Unknown=0, NotChecked=0, Total=5550 [2021-12-06 22:46:24,404 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:24,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 401 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 417 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2021-12-06 22:46:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-06 22:46:24,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2021-12-06 22:46:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2021-12-06 22:46:24,406 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 52 [2021-12-06 22:46:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:24,406 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2021-12-06 22:46:24,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 52 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:24,406 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2021-12-06 22:46:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 22:46:24,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:24,407 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:24,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 22:46:24,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-06 22:46:24,608 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:24,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:24,608 INFO L85 PathProgramCache]: Analyzing trace with hash 457880571, now seen corresponding path program 5 times [2021-12-06 22:46:24,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:24,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807942793] [2021-12-06 22:46:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:24,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:46:24,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:24,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807942793] [2021-12-06 22:46:24,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807942793] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:24,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941107536] [2021-12-06 22:46:24,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:46:24,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:24,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:24,729 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:24,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 22:46:24,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 22:46:24,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:24,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 49 conjunts are in the unsatisfiable core [2021-12-06 22:46:24,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:24,822 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:46:24,822 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 [2021-12-06 22:46:25,006 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:46:25,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:46:25,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941107536] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:25,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:25,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2021-12-06 22:46:25,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537186344] [2021-12-06 22:46:25,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:25,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-06 22:46:25,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:25,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-06 22:46:25,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-12-06 22:46:25,259 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 30 states, 29 states have (on average 4.206896551724138) internal successors, (122), 30 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:25,469 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-12-06 22:46:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 22:46:25,470 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.206896551724138) internal successors, (122), 30 states have internal predecessors, (122), 0 states have call successors, (0), 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 56 [2021-12-06 22:46:25,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:25,470 INFO L225 Difference]: With dead ends: 68 [2021-12-06 22:46:25,470 INFO L226 Difference]: Without dead ends: 68 [2021-12-06 22:46:25,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 22:46:25,471 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 138 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:25,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 205 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:46:25,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-06 22:46:25,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-12-06 22:46:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 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) [2021-12-06 22:46:25,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-12-06 22:46:25,472 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 56 [2021-12-06 22:46:25,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:25,473 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-12-06 22:46:25,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.206896551724138) internal successors, (122), 30 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:25,473 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-12-06 22:46:25,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-06 22:46:25,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:25,473 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:25,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-06 22:46:25,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:25,674 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:25,675 INFO L85 PathProgramCache]: Analyzing trace with hash -336434998, now seen corresponding path program 6 times [2021-12-06 22:46:25,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:25,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640222820] [2021-12-06 22:46:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:25,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:25,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 32 proven. 31 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:46:25,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:25,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640222820] [2021-12-06 22:46:25,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640222820] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:25,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754041519] [2021-12-06 22:46:25,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:46:25,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:25,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:25,818 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:25,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-06 22:46:25,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 22:46:25,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:25,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 22:46:25,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:25,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:46:25,918 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 [2021-12-06 22:46:25,920 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 [2021-12-06 22:46:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:46:26,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 48 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 22:46:26,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754041519] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:26,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:26,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2021-12-06 22:46:26,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996779057] [2021-12-06 22:46:26,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:26,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 22:46:26,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:26,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 22:46:26,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-12-06 22:46:26,344 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 29 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:26,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:26,579 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2021-12-06 22:46:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 22:46:26,579 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 29 states have internal predecessors, (130), 0 states have call successors, (0), 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 [2021-12-06 22:46:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:26,579 INFO L225 Difference]: With dead ends: 117 [2021-12-06 22:46:26,580 INFO L226 Difference]: Without dead ends: 75 [2021-12-06 22:46:26,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=1168, Unknown=0, NotChecked=0, Total=1482 [2021-12-06 22:46:26,580 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 116 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:26,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 177 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:46:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-06 22:46:26,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2021-12-06 22:46:26,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-12-06 22:46:26,582 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 62 [2021-12-06 22:46:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:26,582 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-12-06 22:46:26,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.482758620689655) internal successors, (130), 29 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-12-06 22:46:26,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-06 22:46:26,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:26,583 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:26,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-12-06 22:46:26,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-06 22:46:26,784 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:26,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:26,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1124847399, now seen corresponding path program 7 times [2021-12-06 22:46:26,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:26,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942201721] [2021-12-06 22:46:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:26,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:27,115 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:27,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:27,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942201721] [2021-12-06 22:46:27,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942201721] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:27,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652263886] [2021-12-06 22:46:27,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:46:27,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:27,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:27,116 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:27,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-06 22:46:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:27,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 106 conjunts are in the unsatisfiable core [2021-12-06 22:46:27,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:27,329 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 14 treesize of output 10 [2021-12-06 22:46:27,483 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 [2021-12-06 22:46:27,486 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:27,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:27,789 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:27,789 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 103 treesize of output 103 [2021-12-06 22:46:27,838 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 40 treesize of output 36 [2021-12-06 22:46:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 12 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:46:27,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652263886] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:27,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:27,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 49 [2021-12-06 22:46:27,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410619854] [2021-12-06 22:46:27,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:27,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 22:46:27,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:27,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 22:46:27,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2198, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 22:46:27,952 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:28,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:28,824 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2021-12-06 22:46:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 22:46:28,824 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 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 [2021-12-06 22:46:28,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:28,825 INFO L225 Difference]: With dead ends: 152 [2021-12-06 22:46:28,825 INFO L226 Difference]: Without dead ends: 100 [2021-12-06 22:46:28,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=437, Invalid=4675, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 22:46:28,828 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 177 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:28,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 682 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1183 Invalid, 0 Unknown, 250 Unchecked, 0.3s Time] [2021-12-06 22:46:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-06 22:46:28,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 76. [2021-12-06 22:46:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 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) [2021-12-06 22:46:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-12-06 22:46:28,830 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 66 [2021-12-06 22:46:28,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:28,831 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-12-06 22:46:28,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-12-06 22:46:28,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 22:46:28,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:28,832 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:28,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-12-06 22:46:29,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-06 22:46:29,033 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:29,034 INFO L85 PathProgramCache]: Analyzing trace with hash 284001220, now seen corresponding path program 8 times [2021-12-06 22:46:29,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:29,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059298493] [2021-12-06 22:46:29,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:29,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 6 proven. 70 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:46:29,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:29,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059298493] [2021-12-06 22:46:29,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059298493] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:29,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625205589] [2021-12-06 22:46:29,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:46:29,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:29,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:29,217 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:29,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-06 22:46:29,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:46:29,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:29,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 51 conjunts are in the unsatisfiable core [2021-12-06 22:46:29,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:46:29,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:29,625 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 [2021-12-06 22:46:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 15 proven. 61 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:46:29,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625205589] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:29,658 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:29,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2021-12-06 22:46:29,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405831826] [2021-12-06 22:46:29,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:29,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-06 22:46:29,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:29,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-06 22:46:29,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-12-06 22:46:29,659 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 31 states, 30 states have (on average 3.9) internal successors, (117), 31 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:30,094 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2021-12-06 22:46:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 22:46:30,094 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.9) internal successors, (117), 31 states have internal predecessors, (117), 0 states have call successors, (0), 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 70 [2021-12-06 22:46:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:30,094 INFO L225 Difference]: With dead ends: 79 [2021-12-06 22:46:30,095 INFO L226 Difference]: Without dead ends: 79 [2021-12-06 22:46:30,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=399, Invalid=1671, Unknown=0, NotChecked=0, Total=2070 [2021-12-06 22:46:30,096 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 238 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:30,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 322 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:46:30,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-06 22:46:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-12-06 22:46:30,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:30,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-12-06 22:46:30,097 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 70 [2021-12-06 22:46:30,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:30,097 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-12-06 22:46:30,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.9) internal successors, (117), 31 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-12-06 22:46:30,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-06 22:46:30,098 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:30,098 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:30,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-06 22:46:30,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-06 22:46:30,299 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:30,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:30,300 INFO L85 PathProgramCache]: Analyzing trace with hash 323232178, now seen corresponding path program 5 times [2021-12-06 22:46:30,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:30,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472736839] [2021-12-06 22:46:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:30,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:30,548 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:46:30,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:30,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472736839] [2021-12-06 22:46:30,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472736839] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:30,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101211923] [2021-12-06 22:46:30,548 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:46:30,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:30,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:30,549 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:30,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-06 22:46:30,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 22:46:30,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:30,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 85 conjunts are in the unsatisfiable core [2021-12-06 22:46:30,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:30,670 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 [2021-12-06 22:46:30,856 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 14 treesize of output 10 [2021-12-06 22:46:30,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:46:31,075 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 [2021-12-06 22:46:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:46:31,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:31,140 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_836 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_836) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 4)) 0)) is different from false [2021-12-06 22:46:31,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:31,143 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:46:31,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:31,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:46:31,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:46:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 88 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:46:31,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101211923] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:31,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:31,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2021-12-06 22:46:31,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016607836] [2021-12-06 22:46:31,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:31,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 22:46:31,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:31,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 22:46:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=965, Unknown=1, NotChecked=62, Total=1122 [2021-12-06 22:46:31,322 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 34 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:31,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:31,579 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2021-12-06 22:46:31,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 22:46:31,579 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 34 states have internal predecessors, (116), 0 states have call successors, (0), 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 74 [2021-12-06 22:46:31,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:31,579 INFO L225 Difference]: With dead ends: 136 [2021-12-06 22:46:31,579 INFO L226 Difference]: Without dead ends: 85 [2021-12-06 22:46:31,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=158, Invalid=1567, Unknown=1, NotChecked=80, Total=1806 [2021-12-06 22:46:31,580 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:31,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 337 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 326 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2021-12-06 22:46:31,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-06 22:46:31,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2021-12-06 22:46:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 80 states have (on average 1.05) internal successors, (84), 81 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) [2021-12-06 22:46:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-12-06 22:46:31,583 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 74 [2021-12-06 22:46:31,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:31,583 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-12-06 22:46:31,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.411764705882353) internal successors, (116), 34 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:31,583 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-12-06 22:46:31,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-06 22:46:31,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:31,584 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:31,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-06 22:46:31,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-06 22:46:31,785 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:31,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:31,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1728963727, now seen corresponding path program 6 times [2021-12-06 22:46:31,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:31,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612933156] [2021-12-06 22:46:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:31,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:31,970 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:46:31,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:31,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612933156] [2021-12-06 22:46:31,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612933156] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:31,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112909160] [2021-12-06 22:46:31,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:46:31,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:31,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:31,971 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:31,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-06 22:46:32,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 22:46:32,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:32,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 54 conjunts are in the unsatisfiable core [2021-12-06 22:46:32,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:46:32,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:32,544 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 11 [2021-12-06 22:46:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 22:46:32,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112909160] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:32,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:32,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2021-12-06 22:46:32,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348479114] [2021-12-06 22:46:32,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:32,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 22:46:32,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:32,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 22:46:32,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1206, Unknown=0, NotChecked=0, Total=1406 [2021-12-06 22:46:32,739 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 38 states, 37 states have (on average 4.45945945945946) internal successors, (165), 38 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:33,191 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2021-12-06 22:46:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 22:46:33,191 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.45945945945946) internal successors, (165), 38 states have internal predecessors, (165), 0 states have call successors, (0), 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 78 [2021-12-06 22:46:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:33,192 INFO L225 Difference]: With dead ends: 90 [2021-12-06 22:46:33,192 INFO L226 Difference]: Without dead ends: 90 [2021-12-06 22:46:33,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=564, Invalid=2088, Unknown=0, NotChecked=0, Total=2652 [2021-12-06 22:46:33,193 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 352 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:33,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 297 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:46:33,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-06 22:46:33,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-12-06 22:46:33,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:33,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-12-06 22:46:33,195 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 78 [2021-12-06 22:46:33,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:33,195 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-12-06 22:46:33,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.45945945945946) internal successors, (165), 38 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:33,195 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-12-06 22:46:33,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-06 22:46:33,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:33,196 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:33,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-06 22:46:33,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-06 22:46:33,397 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:33,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:33,398 INFO L85 PathProgramCache]: Analyzing trace with hash -618201744, now seen corresponding path program 9 times [2021-12-06 22:46:33,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:33,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972788883] [2021-12-06 22:46:33,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:33,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:33,807 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:33,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:33,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972788883] [2021-12-06 22:46:33,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972788883] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:33,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607447984] [2021-12-06 22:46:33,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:46:33,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:33,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:33,808 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:33,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-06 22:46:34,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 22:46:34,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:34,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-06 22:46:34,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:34,052 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 [2021-12-06 22:46:34,055 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 [2021-12-06 22:46:34,594 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 14 treesize of output 10 [2021-12-06 22:46:35,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:46:35,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 10 [2021-12-06 22:46:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:35,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:36,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:36,618 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 [2021-12-06 22:46:36,630 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 [2021-12-06 22:46:36,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:36,653 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 54 treesize of output 54 [2021-12-06 22:46:38,390 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 14 proven. 134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:38,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607447984] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:38,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:38,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31, 32] total 86 [2021-12-06 22:46:38,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672418944] [2021-12-06 22:46:38,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:38,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-12-06 22:46:38,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:38,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-12-06 22:46:38,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=553, Invalid=6757, Unknown=0, NotChecked=0, Total=7310 [2021-12-06 22:46:38,394 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 86 states, 86 states have (on average 2.63953488372093) internal successors, (227), 86 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:40,999 INFO L93 Difference]: Finished difference Result 191 states and 195 transitions. [2021-12-06 22:46:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-06 22:46:41,000 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.63953488372093) internal successors, (227), 86 states have internal predecessors, (227), 0 states have call successors, (0), 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 80 [2021-12-06 22:46:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:41,000 INFO L225 Difference]: With dead ends: 191 [2021-12-06 22:46:41,000 INFO L226 Difference]: Without dead ends: 125 [2021-12-06 22:46:41,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4231 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1406, Invalid=15886, Unknown=0, NotChecked=0, Total=17292 [2021-12-06 22:46:41,002 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 281 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1079 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 488 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:41,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 786 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1079 Invalid, 0 Unknown, 488 Unchecked, 0.4s Time] [2021-12-06 22:46:41,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-06 22:46:41,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 90. [2021-12-06 22:46:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 89 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-12-06 22:46:41,004 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 80 [2021-12-06 22:46:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:41,005 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-12-06 22:46:41,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.63953488372093) internal successors, (227), 86 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-12-06 22:46:41,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-06 22:46:41,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:41,006 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:41,025 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-12-06 22:46:41,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:41,207 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:41,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:41,208 INFO L85 PathProgramCache]: Analyzing trace with hash -704234675, now seen corresponding path program 10 times [2021-12-06 22:46:41,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:41,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012750455] [2021-12-06 22:46:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:41,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:46:41,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:41,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012750455] [2021-12-06 22:46:41,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012750455] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:41,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975193778] [2021-12-06 22:46:41,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:46:41,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:41,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:41,393 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:41,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-06 22:46:41,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:46:41,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:41,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 133 conjunts are in the unsatisfiable core [2021-12-06 22:46:41,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:41,493 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:46:41,493 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 [2021-12-06 22:46:41,502 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 [2021-12-06 22:46:41,999 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 16 treesize of output 12 [2021-12-06 22:46:42,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:42,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2021-12-06 22:46:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 32 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:42,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:44,187 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:44,187 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 [2021-12-06 22:46:44,197 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 [2021-12-06 22:46:44,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:44,222 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 54 treesize of output 54 [2021-12-06 22:46:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 45 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:46,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975193778] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:46,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:46,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 34, 34] total 82 [2021-12-06 22:46:46,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150948670] [2021-12-06 22:46:46,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:46,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-06 22:46:46,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:46,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-06 22:46:46,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=726, Invalid=6080, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 22:46:46,471 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 83 states, 82 states have (on average 2.7804878048780486) internal successors, (228), 83 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) [2021-12-06 22:46:52,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:52,386 INFO L93 Difference]: Finished difference Result 182 states and 190 transitions. [2021-12-06 22:46:52,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-12-06 22:46:52,387 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 2.7804878048780486) internal successors, (228), 83 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) Word has length 84 [2021-12-06 22:46:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:52,389 INFO L225 Difference]: With dead ends: 182 [2021-12-06 22:46:52,389 INFO L226 Difference]: Without dead ends: 182 [2021-12-06 22:46:52,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 116 SyntacticMatches, 6 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5817 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3627, Invalid=18425, Unknown=0, NotChecked=0, Total=22052 [2021-12-06 22:46:52,390 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 868 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1367 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 1367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 861 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:52,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 517 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 1367 Invalid, 0 Unknown, 861 Unchecked, 0.6s Time] [2021-12-06 22:46:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-12-06 22:46:52,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2021-12-06 22:46:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 174 states have (on average 1.0574712643678161) internal successors, (184), 175 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) [2021-12-06 22:46:52,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 184 transitions. [2021-12-06 22:46:52,395 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 184 transitions. Word has length 84 [2021-12-06 22:46:52,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:52,395 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 184 transitions. [2021-12-06 22:46:52,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 2.7804878048780486) internal successors, (228), 83 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) [2021-12-06 22:46:52,395 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 184 transitions. [2021-12-06 22:46:52,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-06 22:46:52,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:52,396 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:52,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-06 22:46:52,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:52,597 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:52,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:52,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1498157893, now seen corresponding path program 7 times [2021-12-06 22:46:52,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:52,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366428938] [2021-12-06 22:46:52,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:52,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:52,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 135 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:46:52,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:52,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366428938] [2021-12-06 22:46:52,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366428938] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:52,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251145328] [2021-12-06 22:46:52,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:46:52,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:52,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:52,818 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:52,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-06 22:46:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:52,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 81 conjunts are in the unsatisfiable core [2021-12-06 22:46:52,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:52,912 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 [2021-12-06 22:46:53,124 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 14 treesize of output 10 [2021-12-06 22:46:53,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:46:53,275 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 [2021-12-06 22:46:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 135 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:46:53,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:53,349 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1075 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1075) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 5)) 0)) is different from false [2021-12-06 22:46:53,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:53,353 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:46:53,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:53,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:46:53,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:46:53,563 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 6 proven. 135 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:46:53,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251145328] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:53,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:53,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 36 [2021-12-06 22:46:53,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464989788] [2021-12-06 22:46:53,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:53,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-06 22:46:53,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:53,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-06 22:46:53,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1090, Unknown=1, NotChecked=66, Total=1260 [2021-12-06 22:46:53,565 INFO L87 Difference]: Start difference. First operand 176 states and 184 transitions. Second operand has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:54,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:54,038 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2021-12-06 22:46:54,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 22:46:54,039 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 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 88 [2021-12-06 22:46:54,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:54,039 INFO L225 Difference]: With dead ends: 160 [2021-12-06 22:46:54,039 INFO L226 Difference]: Without dead ends: 99 [2021-12-06 22:46:54,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 158 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=2330, Unknown=1, NotChecked=98, Total=2652 [2021-12-06 22:46:54,040 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 69 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:54,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 576 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 898 Invalid, 0 Unknown, 120 Unchecked, 0.2s Time] [2021-12-06 22:46:54,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-06 22:46:54,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2021-12-06 22:46:54,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2021-12-06 22:46:54,042 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 88 [2021-12-06 22:46:54,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:54,042 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2021-12-06 22:46:54,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.3333333333333335) internal successors, (120), 36 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:54,042 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2021-12-06 22:46:54,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-06 22:46:54,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:54,043 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:54,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-06 22:46:54,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-12-06 22:46:54,243 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:54,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:54,243 INFO L85 PathProgramCache]: Analyzing trace with hash -5445416, now seen corresponding path program 8 times [2021-12-06 22:46:54,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:54,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458094751] [2021-12-06 22:46:54,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:54,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:46:54,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:54,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458094751] [2021-12-06 22:46:54,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458094751] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:54,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485272147] [2021-12-06 22:46:54,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:46:54,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:54,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:54,392 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:54,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 22:46:54,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:46:54,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:54,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-06 22:46:54,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:46:54,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:54,877 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 [2021-12-06 22:46:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 22:46:54,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485272147] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:54,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:54,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 36 [2021-12-06 22:46:54,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269704818] [2021-12-06 22:46:54,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:54,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-06 22:46:54,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:54,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-06 22:46:54,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2021-12-06 22:46:54,926 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 37 states, 36 states have (on average 4.333333333333333) internal successors, (156), 37 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:55,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:55,267 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2021-12-06 22:46:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 22:46:55,268 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 4.333333333333333) internal successors, (156), 37 states have internal predecessors, (156), 0 states have call successors, (0), 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 92 [2021-12-06 22:46:55,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:55,268 INFO L225 Difference]: With dead ends: 104 [2021-12-06 22:46:55,268 INFO L226 Difference]: Without dead ends: 104 [2021-12-06 22:46:55,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=1821, Unknown=0, NotChecked=0, Total=2256 [2021-12-06 22:46:55,269 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 367 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:55,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 393 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:46:55,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-12-06 22:46:55,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-12-06 22:46:55,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 99 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) [2021-12-06 22:46:55,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2021-12-06 22:46:55,271 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 92 [2021-12-06 22:46:55,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:55,271 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2021-12-06 22:46:55,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 4.333333333333333) internal successors, (156), 37 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:55,271 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2021-12-06 22:46:55,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-12-06 22:46:55,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:55,272 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:55,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-12-06 22:46:55,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-12-06 22:46:55,472 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:55,473 INFO L85 PathProgramCache]: Analyzing trace with hash -938077319, now seen corresponding path program 11 times [2021-12-06 22:46:55,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:55,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156055641] [2021-12-06 22:46:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:55,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:46:55,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:55,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156055641] [2021-12-06 22:46:55,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156055641] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:55,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678913144] [2021-12-06 22:46:55,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:46:55,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:55,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:55,919 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:55,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-06 22:46:56,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 22:46:56,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:56,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 146 conjunts are in the unsatisfiable core [2021-12-06 22:46:56,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:56,396 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 14 treesize of output 10 [2021-12-06 22:46:56,583 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 [2021-12-06 22:46:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 200 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:46:56,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:46:57,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:46:57,138 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 103 treesize of output 103 [2021-12-06 22:46:57,169 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 40 treesize of output 36 [2021-12-06 22:46:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:46:57,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678913144] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:46:57,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:46:57,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 27, 27] total 63 [2021-12-06 22:46:57,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390823885] [2021-12-06 22:46:57,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:46:57,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 22:46:57,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:46:57,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 22:46:57,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3712, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 22:46:57,343 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 63 states, 63 states have (on average 3.0476190476190474) internal successors, (192), 63 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:46:59,020 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2021-12-06 22:46:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 22:46:59,020 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.0476190476190474) internal successors, (192), 63 states have internal predecessors, (192), 0 states have call successors, (0), 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 94 [2021-12-06 22:46:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:46:59,021 INFO L225 Difference]: With dead ends: 149 [2021-12-06 22:46:59,021 INFO L226 Difference]: Without dead ends: 110 [2021-12-06 22:46:59,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 151 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=575, Invalid=7081, Unknown=0, NotChecked=0, Total=7656 [2021-12-06 22:46:59,022 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 297 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 2559 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1105 SdHoareTripleChecker+Invalid, 2774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:46:59,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 1105 Invalid, 2774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2559 Invalid, 0 Unknown, 147 Unchecked, 0.8s Time] [2021-12-06 22:46:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-12-06 22:46:59,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2021-12-06 22:46:59,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 103 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2021-12-06 22:46:59,024 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 94 [2021-12-06 22:46:59,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:46:59,024 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2021-12-06 22:46:59,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.0476190476190474) internal successors, (192), 63 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:46:59,024 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2021-12-06 22:46:59,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-06 22:46:59,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:46:59,024 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:46:59,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-06 22:46:59,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-12-06 22:46:59,226 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:46:59,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:46:59,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1626450582, now seen corresponding path program 12 times [2021-12-06 22:46:59,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:46:59,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475575992] [2021-12-06 22:46:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:46:59,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:46:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:46:59,459 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:46:59,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:46:59,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475575992] [2021-12-06 22:46:59,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475575992] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:46:59,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618116398] [2021-12-06 22:46:59,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:46:59,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:46:59,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:46:59,461 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:46:59,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-06 22:46:59,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-12-06 22:46:59,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:46:59,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 22:46:59,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:46:59,762 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:46:59,762 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 [2021-12-06 22:47:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 45 proven. 129 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:47:00,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:47:00,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618116398] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:47:00,804 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:47:00,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2021-12-06 22:47:00,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365459104] [2021-12-06 22:47:00,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:00,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 22:47:00,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:00,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 22:47:00,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=2422, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 22:47:00,805 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 53 states, 52 states have (on average 4.346153846153846) internal successors, (226), 53 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:01,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:47:01,549 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-12-06 22:47:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 22:47:01,549 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.346153846153846) internal successors, (226), 53 states have internal predecessors, (226), 0 states have call successors, (0), 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 98 [2021-12-06 22:47:01,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:47:01,550 INFO L225 Difference]: With dead ends: 107 [2021-12-06 22:47:01,550 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 22:47:01,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1077, Invalid=4325, Unknown=0, NotChecked=0, Total=5402 [2021-12-06 22:47:01,550 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 465 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:47:01,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 222 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:47:01,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 22:47:01,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2021-12-06 22:47:01,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 105 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) [2021-12-06 22:47:01,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-12-06 22:47:01,552 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 98 [2021-12-06 22:47:01,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:47:01,553 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-12-06 22:47:01,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.346153846153846) internal successors, (226), 53 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:01,553 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-12-06 22:47:01,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-06 22:47:01,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:47:01,553 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:47:01,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-06 22:47:01,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-12-06 22:47:01,754 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:47:01,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:47:01,754 INFO L85 PathProgramCache]: Analyzing trace with hash -464220284, now seen corresponding path program 9 times [2021-12-06 22:47:01,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:47:01,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262768696] [2021-12-06 22:47:01,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:01,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:47:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 7 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:47:01,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:47:01,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262768696] [2021-12-06 22:47:01,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262768696] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:01,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501522618] [2021-12-06 22:47:01,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:47:01,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:01,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:47:01,989 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:47:01,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-06 22:47:02,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-06 22:47:02,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:47:02,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 189 conjunts are in the unsatisfiable core [2021-12-06 22:47:02,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:47:02,417 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 [2021-12-06 22:47:02,421 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 [2021-12-06 22:47:03,563 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 14 treesize of output 10 [2021-12-06 22:47:03,629 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 39 treesize of output 29 [2021-12-06 22:47:03,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-12-06 22:47:05,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:47:05,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2021-12-06 22:47:05,105 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 7 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:47:05,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:05,895 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-12-06 22:47:05,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 246 treesize of output 211 [2021-12-06 22:47:05,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:47:05,906 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 153 treesize of output 147 [2021-12-06 22:47:05,919 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 40 treesize of output 36 [2021-12-06 22:47:05,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:47:05,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:47:05,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 73 [2021-12-06 22:47:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 7 proven. 192 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-12-06 22:47:07,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501522618] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:47:07,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:47:07,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 41, 31] total 87 [2021-12-06 22:47:07,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242641371] [2021-12-06 22:47:07,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:07,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-12-06 22:47:07,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:07,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-12-06 22:47:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=7054, Unknown=0, NotChecked=0, Total=7482 [2021-12-06 22:47:07,103 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 87 states, 87 states have (on average 2.9080459770114944) internal successors, (253), 87 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:08,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:47:08,249 INFO L93 Difference]: Finished difference Result 279 states and 284 transitions. [2021-12-06 22:47:08,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-12-06 22:47:08,250 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.9080459770114944) internal successors, (253), 87 states have internal predecessors, (253), 0 states have call successors, (0), 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 102 [2021-12-06 22:47:08,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:47:08,251 INFO L225 Difference]: With dead ends: 279 [2021-12-06 22:47:08,251 INFO L226 Difference]: Without dead ends: 117 [2021-12-06 22:47:08,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2948 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=668, Invalid=9432, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 22:47:08,252 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 136 mSDsluCounter, 998 mSDsCounter, 0 mSdLazyCounter, 1664 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:47:08,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 1024 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1664 Invalid, 0 Unknown, 169 Unchecked, 0.6s Time] [2021-12-06 22:47:08,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-06 22:47:08,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2021-12-06 22:47:08,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 113 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:08,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2021-12-06 22:47:08,254 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 102 [2021-12-06 22:47:08,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:47:08,254 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2021-12-06 22:47:08,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.9080459770114944) internal successors, (253), 87 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:08,254 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2021-12-06 22:47:08,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-06 22:47:08,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:47:08,255 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:47:08,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-12-06 22:47:08,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:08,456 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:47:08,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:47:08,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1427584898, now seen corresponding path program 10 times [2021-12-06 22:47:08,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:47:08,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367405277] [2021-12-06 22:47:08,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:08,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:47:08,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:08,676 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:47:08,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:47:08,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367405277] [2021-12-06 22:47:08,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367405277] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:08,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094449378] [2021-12-06 22:47:08,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:47:08,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:08,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:47:08,678 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:47:08,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-06 22:47:08,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:47:08,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:47:08,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 22:47:08,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:47:08,795 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:47:08,795 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 [2021-12-06 22:47:08,798 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 [2021-12-06 22:47:09,190 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 16 treesize of output 12 [2021-12-06 22:47:09,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-06 22:47:09,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:47:09,630 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 21 treesize of output 21 [2021-12-06 22:47:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 72 proven. 152 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:47:09,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:10,294 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1423 (Array Int Int)) (|v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_219| Int)) (or (< |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_219| 0) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_219|) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1423) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_219| 6))) (<= (+ |v_ULTIMATE.start_cstrcmp_#t~post5#1.offset_219| 8) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)))) is different from false [2021-12-06 22:47:10,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:47:10,301 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:47:10,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:47:10,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:47:10,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:47:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 91 proven. 133 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:47:11,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094449378] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:47:11,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:47:11,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 61 [2021-12-06 22:47:11,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409996581] [2021-12-06 22:47:11,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:11,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-12-06 22:47:11,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:11,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-12-06 22:47:11,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=3271, Unknown=1, NotChecked=118, Total=3782 [2021-12-06 22:47:11,787 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 62 states, 61 states have (on average 4.098360655737705) internal successors, (250), 62 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:12,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:47:12,857 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2021-12-06 22:47:12,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-06 22:47:12,858 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 4.098360655737705) internal successors, (250), 62 states have internal predecessors, (250), 0 states have call successors, (0), 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 110 [2021-12-06 22:47:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:47:12,858 INFO L225 Difference]: With dead ends: 125 [2021-12-06 22:47:12,859 INFO L226 Difference]: Without dead ends: 125 [2021-12-06 22:47:12,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 177 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 854 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1077, Invalid=5088, Unknown=1, NotChecked=154, Total=6320 [2021-12-06 22:47:12,859 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 491 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:47:12,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 531 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 1061 Invalid, 0 Unknown, 169 Unchecked, 0.4s Time] [2021-12-06 22:47:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-06 22:47:12,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-12-06 22:47:12,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.040983606557377) internal successors, (127), 123 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2021-12-06 22:47:12,861 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 110 [2021-12-06 22:47:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:47:12,861 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2021-12-06 22:47:12,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 4.098360655737705) internal successors, (250), 62 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2021-12-06 22:47:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-06 22:47:12,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:47:12,862 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:47:12,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-06 22:47:13,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:13,063 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:47:13,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:47:13,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1814519393, now seen corresponding path program 13 times [2021-12-06 22:47:13,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:47:13,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975273176] [2021-12-06 22:47:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:13,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:47:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 45 proven. 193 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:47:13,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:47:13,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975273176] [2021-12-06 22:47:13,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975273176] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:13,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868399624] [2021-12-06 22:47:13,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:47:13,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:13,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:47:13,325 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:47:13,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-12-06 22:47:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:13,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 78 conjunts are in the unsatisfiable core [2021-12-06 22:47:13,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:47:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 66 proven. 172 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:47:13,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:13,940 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 [2021-12-06 22:47:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 66 proven. 172 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:47:13,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868399624] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:47:13,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:47:13,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 43 [2021-12-06 22:47:13,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316073639] [2021-12-06 22:47:13,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:13,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-06 22:47:13,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:13,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-06 22:47:13,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1676, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 22:47:13,990 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 44 states, 43 states have (on average 4.116279069767442) internal successors, (177), 44 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:47:14,476 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2021-12-06 22:47:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 22:47:14,476 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.116279069767442) internal successors, (177), 44 states have internal predecessors, (177), 0 states have call successors, (0), 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 112 [2021-12-06 22:47:14,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:47:14,477 INFO L225 Difference]: With dead ends: 124 [2021-12-06 22:47:14,477 INFO L226 Difference]: Without dead ends: 124 [2021-12-06 22:47:14,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=721, Invalid=3061, Unknown=0, NotChecked=0, Total=3782 [2021-12-06 22:47:14,478 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 428 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:47:14,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 409 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 22:47:14,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-06 22:47:14,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-06 22:47:14,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 123 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:14,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2021-12-06 22:47:14,479 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 112 [2021-12-06 22:47:14,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:47:14,480 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2021-12-06 22:47:14,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.116279069767442) internal successors, (177), 44 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:14,480 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2021-12-06 22:47:14,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-06 22:47:14,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:47:14,480 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:47:14,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-12-06 22:47:14,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-12-06 22:47:14,681 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:47:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:47:14,683 INFO L85 PathProgramCache]: Analyzing trace with hash 253266798, now seen corresponding path program 14 times [2021-12-06 22:47:14,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:47:14,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301515251] [2021-12-06 22:47:14,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:14,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:47:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 156 proven. 127 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:47:14,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:47:14,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301515251] [2021-12-06 22:47:14,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301515251] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:14,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101187961] [2021-12-06 22:47:14,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:47:14,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:14,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:47:14,912 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:47:14,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-12-06 22:47:15,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:47:15,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:47:15,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-06 22:47:15,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:47:15,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 22:47:15,036 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 [2021-12-06 22:47:15,038 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 [2021-12-06 22:47:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 185 proven. 98 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:47:15,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 163 proven. 120 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-12-06 22:47:15,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101187961] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:47:15,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:47:15,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 50 [2021-12-06 22:47:15,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881102121] [2021-12-06 22:47:15,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:15,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 22:47:15,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:15,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 22:47:15,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2021-12-06 22:47:15,863 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:16,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:47:16,232 INFO L93 Difference]: Finished difference Result 213 states and 216 transitions. [2021-12-06 22:47:16,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:47:16,232 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 0 states have call successors, (0), 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 [2021-12-06 22:47:16,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:47:16,233 INFO L225 Difference]: With dead ends: 213 [2021-12-06 22:47:16,233 INFO L226 Difference]: Without dead ends: 131 [2021-12-06 22:47:16,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=996, Invalid=3560, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 22:47:16,233 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 152 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:47:16,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 231 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 22:47:16,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-06 22:47:16,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 128. [2021-12-06 22:47:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 127 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2021-12-06 22:47:16,235 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 118 [2021-12-06 22:47:16,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:47:16,235 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2021-12-06 22:47:16,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2021-12-06 22:47:16,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-06 22:47:16,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:47:16,236 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:47:16,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-12-06 22:47:16,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:16,437 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:47:16,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:47:16,438 INFO L85 PathProgramCache]: Analyzing trace with hash -376490293, now seen corresponding path program 15 times [2021-12-06 22:47:16,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:47:16,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176629690] [2021-12-06 22:47:16,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:16,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:47:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 24 proven. 379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:47:17,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:47:17,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176629690] [2021-12-06 22:47:17,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176629690] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:17,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295489659] [2021-12-06 22:47:17,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:47:17,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:17,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:47:17,031 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:47:17,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 22:47:17,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-06 22:47:17,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:47:17,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 196 conjunts are in the unsatisfiable core [2021-12-06 22:47:17,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:47:17,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:47:18,538 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 22:47:18,539 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 10 [2021-12-06 22:47:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 24 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:47:18,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:19,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:47:19,231 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 103 treesize of output 103 [2021-12-06 22:47:19,240 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 40 treesize of output 36 [2021-12-06 22:47:19,264 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 7 treesize of output 3 [2021-12-06 22:47:19,636 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 24 proven. 259 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:47:19,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295489659] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:47:19,637 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:47:19,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 41, 33] total 92 [2021-12-06 22:47:19,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150195333] [2021-12-06 22:47:19,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:19,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-12-06 22:47:19,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:19,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-12-06 22:47:19,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=8042, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 22:47:19,639 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand has 92 states, 92 states have (on average 3.108695652173913) internal successors, (286), 92 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:47:22,131 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2021-12-06 22:47:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 22:47:22,131 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.108695652173913) internal successors, (286), 92 states have internal predecessors, (286), 0 states have call successors, (0), 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 [2021-12-06 22:47:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:47:22,132 INFO L225 Difference]: With dead ends: 189 [2021-12-06 22:47:22,132 INFO L226 Difference]: Without dead ends: 138 [2021-12-06 22:47:22,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3553 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=928, Invalid=13592, Unknown=0, NotChecked=0, Total=14520 [2021-12-06 22:47:22,133 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 417 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 4958 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 5119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 4958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:47:22,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1604 Invalid, 5119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 4958 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-06 22:47:22,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-12-06 22:47:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-12-06 22:47:22,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 131 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2021-12-06 22:47:22,136 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 122 [2021-12-06 22:47:22,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:47:22,137 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2021-12-06 22:47:22,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.108695652173913) internal successors, (286), 92 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:22,137 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2021-12-06 22:47:22,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-12-06 22:47:22,137 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:47:22,138 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:47:22,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-12-06 22:47:22,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:22,339 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:47:22,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:47:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1840246888, now seen corresponding path program 16 times [2021-12-06 22:47:22,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:47:22,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421683631] [2021-12-06 22:47:22,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:22,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:47:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:22,596 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 66 proven. 246 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:47:22,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:47:22,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421683631] [2021-12-06 22:47:22,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421683631] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:22,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045644533] [2021-12-06 22:47:22,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:47:22,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:22,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:47:22,598 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:47:22,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 22:47:22,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:47:22,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:47:22,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 190 conjunts are in the unsatisfiable core [2021-12-06 22:47:22,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:47:22,741 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:47:22,742 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 [2021-12-06 22:47:23,275 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 [2021-12-06 22:47:23,900 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-12-06 22:47:23,900 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 32 treesize of output 36 [2021-12-06 22:47:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 98 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:47:24,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:25,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:47:25,576 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 103 treesize of output 103 [2021-12-06 22:47:25,593 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 40 treesize of output 36 [2021-12-06 22:47:27,050 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 120 proven. 192 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:47:27,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045644533] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:47:27,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:47:27,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 35, 35] total 90 [2021-12-06 22:47:27,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912626894] [2021-12-06 22:47:27,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:27,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-06 22:47:27,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:27,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-06 22:47:27,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=7512, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 22:47:27,052 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 91 states, 90 states have (on average 3.488888888888889) internal successors, (314), 91 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:30,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:47:30,141 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2021-12-06 22:47:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-06 22:47:30,142 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 3.488888888888889) internal successors, (314), 91 states have internal predecessors, (314), 0 states have call successors, (0), 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 126 [2021-12-06 22:47:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:47:30,142 INFO L225 Difference]: With dead ends: 141 [2021-12-06 22:47:30,142 INFO L226 Difference]: Without dead ends: 141 [2021-12-06 22:47:30,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 184 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2677 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2284, Invalid=12722, Unknown=0, NotChecked=0, Total=15006 [2021-12-06 22:47:30,143 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 858 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 3453 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 3859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 3453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:47:30,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [858 Valid, 1261 Invalid, 3859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 3453 Invalid, 0 Unknown, 143 Unchecked, 1.2s Time] [2021-12-06 22:47:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-06 22:47:30,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-12-06 22:47:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 138 states have (on average 1.036231884057971) internal successors, (143), 139 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:30,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2021-12-06 22:47:30,145 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 126 [2021-12-06 22:47:30,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:47:30,146 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2021-12-06 22:47:30,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 3.488888888888889) internal successors, (314), 91 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2021-12-06 22:47:30,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-06 22:47:30,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:47:30,146 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:47:30,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 22:47:30,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-12-06 22:47:30,347 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:47:30,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:47:30,349 INFO L85 PathProgramCache]: Analyzing trace with hash 972528726, now seen corresponding path program 11 times [2021-12-06 22:47:30,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:47:30,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893249716] [2021-12-06 22:47:30,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:30,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:47:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 9 proven. 336 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:47:30,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:47:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893249716] [2021-12-06 22:47:30,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893249716] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955307410] [2021-12-06 22:47:30,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:47:30,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:30,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:47:30,719 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:47:30,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 22:47:31,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-06 22:47:31,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:47:31,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 186 conjunts are in the unsatisfiable core [2021-12-06 22:47:31,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:47:31,417 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 14 treesize of output 10 [2021-12-06 22:47:32,247 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 [2021-12-06 22:47:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 9 proven. 336 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:47:32,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:35,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:47:35,231 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 103 treesize of output 103 [2021-12-06 22:47:35,268 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 40 treesize of output 36 [2021-12-06 22:47:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 9 proven. 336 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-06 22:47:35,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955307410] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:47:35,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:47:35,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29, 36] total 83 [2021-12-06 22:47:35,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736474411] [2021-12-06 22:47:35,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:35,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-06 22:47:35,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:35,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-06 22:47:35,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=6552, Unknown=1, NotChecked=0, Total=6806 [2021-12-06 22:47:35,748 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 83 states, 83 states have (on average 3.5180722891566263) internal successors, (292), 83 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:47:38,535 INFO L93 Difference]: Finished difference Result 362 states and 368 transitions. [2021-12-06 22:47:38,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-12-06 22:47:38,535 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.5180722891566263) internal successors, (292), 83 states have internal predecessors, (292), 0 states have call successors, (0), 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 130 [2021-12-06 22:47:38,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:47:38,536 INFO L225 Difference]: With dead ends: 362 [2021-12-06 22:47:38,536 INFO L226 Difference]: Without dead ends: 154 [2021-12-06 22:47:38,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3133 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=746, Invalid=18159, Unknown=1, NotChecked=0, Total=18906 [2021-12-06 22:47:38,537 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 221 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 3221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 610 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:47:38,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 1707 Invalid, 3221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2549 Invalid, 0 Unknown, 610 Unchecked, 0.7s Time] [2021-12-06 22:47:38,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-06 22:47:38,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2021-12-06 22:47:38,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 146 states have (on average 1.0342465753424657) internal successors, (151), 147 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:38,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2021-12-06 22:47:38,539 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 130 [2021-12-06 22:47:38,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:47:38,539 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2021-12-06 22:47:38,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.5180722891566263) internal successors, (292), 83 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:38,540 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2021-12-06 22:47:38,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-06 22:47:38,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:47:38,540 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:47:38,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 22:47:38,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:38,741 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:47:38,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:47:38,742 INFO L85 PathProgramCache]: Analyzing trace with hash -205669808, now seen corresponding path program 12 times [2021-12-06 22:47:38,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:47:38,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650240449] [2021-12-06 22:47:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:38,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:47:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 91 proven. 287 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:47:39,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:47:39,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650240449] [2021-12-06 22:47:39,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650240449] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:39,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613251823] [2021-12-06 22:47:39,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:47:39,047 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:39,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:47:39,047 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:47:39,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 22:47:40,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-06 22:47:40,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:47:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 95 conjunts are in the unsatisfiable core [2021-12-06 22:47:40,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:47:40,581 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:47:40,582 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 [2021-12-06 22:47:41,393 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 [2021-12-06 22:47:42,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:47:42,298 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 21 treesize of output 25 [2021-12-06 22:47:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 120 proven. 258 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:47:42,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:43,482 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 37 treesize of output 31 [2021-12-06 22:47:45,218 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 153 proven. 225 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:47:45,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613251823] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:47:45,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:47:45,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 69 [2021-12-06 22:47:45,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822861491] [2021-12-06 22:47:45,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:45,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 22:47:45,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:45,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 22:47:45,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=4305, Unknown=0, NotChecked=0, Total=4830 [2021-12-06 22:47:45,220 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 70 states, 69 states have (on average 4.492753623188406) internal successors, (310), 70 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:47:46,744 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2021-12-06 22:47:46,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-12-06 22:47:46,744 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 4.492753623188406) internal successors, (310), 70 states have internal predecessors, (310), 0 states have call successors, (0), 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 138 [2021-12-06 22:47:46,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:47:46,745 INFO L225 Difference]: With dead ends: 149 [2021-12-06 22:47:46,745 INFO L226 Difference]: Without dead ends: 149 [2021-12-06 22:47:46,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 239 SyntacticMatches, 9 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1154, Invalid=8946, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 22:47:46,746 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 136 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:47:46,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 825 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 591 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2021-12-06 22:47:46,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-12-06 22:47:46,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-12-06 22:47:46,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 147 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2021-12-06 22:47:46,749 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 138 [2021-12-06 22:47:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:47:46,749 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2021-12-06 22:47:46,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 4.492753623188406) internal successors, (310), 70 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2021-12-06 22:47:46,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-06 22:47:46,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:47:46,750 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:47:46,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-12-06 22:47:46,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:46,952 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:47:46,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:47:46,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1239393887, now seen corresponding path program 13 times [2021-12-06 22:47:46,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:47:46,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660391854] [2021-12-06 22:47:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:46,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:47:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:47,362 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 10 proven. 423 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:47:47,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:47:47,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660391854] [2021-12-06 22:47:47,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660391854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:47,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776024440] [2021-12-06 22:47:47,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:47:47,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:47,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:47:47,363 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:47:47,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-06 22:47:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:47,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-06 22:47:47,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:47:47,537 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 [2021-12-06 22:47:47,948 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 14 treesize of output 10 [2021-12-06 22:47:47,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:47:48,161 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 [2021-12-06 22:47:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 10 proven. 423 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:47:48,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:48,266 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2013 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2013) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 9)) 0)) is different from false [2021-12-06 22:47:48,271 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:47:48,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:47:48,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:47:48,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:47:48,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:47:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 10 proven. 423 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:47:48,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776024440] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:47:48,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:47:48,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 48 [2021-12-06 22:47:48,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382032504] [2021-12-06 22:47:48,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:48,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-06 22:47:48,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:48,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-06 22:47:48,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2034, Unknown=1, NotChecked=90, Total=2256 [2021-12-06 22:47:48,603 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:47:49,653 INFO L93 Difference]: Finished difference Result 256 states and 259 transitions. [2021-12-06 22:47:49,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 22:47:49,653 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 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 144 [2021-12-06 22:47:49,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:47:49,654 INFO L225 Difference]: With dead ends: 256 [2021-12-06 22:47:49,654 INFO L226 Difference]: Without dead ends: 155 [2021-12-06 22:47:49,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=275, Invalid=4698, Unknown=1, NotChecked=138, Total=5112 [2021-12-06 22:47:49,655 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 100 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 1936 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1092 SdHoareTripleChecker+Invalid, 2174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:47:49,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 1092 Invalid, 2174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1936 Invalid, 0 Unknown, 216 Unchecked, 0.5s Time] [2021-12-06 22:47:49,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-06 22:47:49,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2021-12-06 22:47:49,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 151 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 154 transitions. [2021-12-06 22:47:49,657 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 154 transitions. Word has length 144 [2021-12-06 22:47:49,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:47:49,657 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 154 transitions. [2021-12-06 22:47:49,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:49,657 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 154 transitions. [2021-12-06 22:47:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-06 22:47:49,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:47:49,658 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:47:49,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-06 22:47:49,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:49,859 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:47:49,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:47:49,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1434036092, now seen corresponding path program 14 times [2021-12-06 22:47:49,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:47:49,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208649558] [2021-12-06 22:47:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:49,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:47:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 120 proven. 350 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:47:50,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:47:50,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208649558] [2021-12-06 22:47:50,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208649558] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:50,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424855548] [2021-12-06 22:47:50,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:47:50,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:50,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:47:50,178 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:47:50,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-12-06 22:47:50,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:47:50,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:47:50,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-06 22:47:50,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:47:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:47:50,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:51,057 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 [2021-12-06 22:47:51,145 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 153 proven. 317 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-12-06 22:47:51,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424855548] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:47:51,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:47:51,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 52 [2021-12-06 22:47:51,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057747541] [2021-12-06 22:47:51,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:51,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-06 22:47:51,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:51,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-06 22:47:51,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=2429, Unknown=0, NotChecked=0, Total=2756 [2021-12-06 22:47:51,147 INFO L87 Difference]: Start difference. First operand 152 states and 154 transitions. Second operand has 53 states, 52 states have (on average 4.538461538461538) internal successors, (236), 53 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:47:51,791 INFO L93 Difference]: Finished difference Result 160 states and 162 transitions. [2021-12-06 22:47:51,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 22:47:51,791 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.538461538461538) internal successors, (236), 53 states have internal predecessors, (236), 0 states have call successors, (0), 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 148 [2021-12-06 22:47:51,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:47:51,792 INFO L225 Difference]: With dead ends: 160 [2021-12-06 22:47:51,792 INFO L226 Difference]: Without dead ends: 160 [2021-12-06 22:47:51,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 266 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=849, Invalid=3707, Unknown=0, NotChecked=0, Total=4556 [2021-12-06 22:47:51,793 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 650 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:47:51,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [650 Valid, 678 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1423 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:47:51,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-06 22:47:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2021-12-06 22:47:51,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 154 states have (on average 1.025974025974026) internal successors, (158), 155 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2021-12-06 22:47:51,795 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 148 [2021-12-06 22:47:51,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:47:51,795 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2021-12-06 22:47:51,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.538461538461538) internal successors, (236), 53 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2021-12-06 22:47:51,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-06 22:47:51,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:47:51,796 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:47:51,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-12-06 22:47:51,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-12-06 22:47:51,997 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:47:51,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:47:51,998 INFO L85 PathProgramCache]: Analyzing trace with hash -575817443, now seen corresponding path program 17 times [2021-12-06 22:47:51,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:47:51,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199136350] [2021-12-06 22:47:51,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:51,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:47:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:52,862 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 30 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:47:52,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:47:52,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199136350] [2021-12-06 22:47:52,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199136350] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:52,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736001891] [2021-12-06 22:47:52,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:47:52,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:52,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:47:52,863 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:47:52,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-12-06 22:47:53,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-12-06 22:47:53,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:47:53,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 224 conjunts are in the unsatisfiable core [2021-12-06 22:47:53,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:47:53,929 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 14 treesize of output 10 [2021-12-06 22:47:54,217 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 [2021-12-06 22:47:54,220 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 30 proven. 612 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:47:54,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:47:55,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:47:55,316 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 103 treesize of output 103 [2021-12-06 22:47:55,342 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 40 treesize of output 36 [2021-12-06 22:47:55,546 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 30 proven. 423 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 22:47:55,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736001891] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:47:55,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:47:55,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 91 [2021-12-06 22:47:55,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371569157] [2021-12-06 22:47:55,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:47:55,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-12-06 22:47:55,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:47:55,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-12-06 22:47:55,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=7916, Unknown=0, NotChecked=0, Total=8190 [2021-12-06 22:47:55,548 INFO L87 Difference]: Start difference. First operand 156 states and 158 transitions. Second operand has 91 states, 91 states have (on average 3.340659340659341) internal successors, (304), 91 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) [2021-12-06 22:47:58,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:47:58,874 INFO L93 Difference]: Finished difference Result 229 states and 231 transitions. [2021-12-06 22:47:58,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 22:47:58,874 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.340659340659341) internal successors, (304), 91 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) Word has length 150 [2021-12-06 22:47:58,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:47:58,875 INFO L225 Difference]: With dead ends: 229 [2021-12-06 22:47:58,875 INFO L226 Difference]: Without dead ends: 166 [2021-12-06 22:47:58,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 247 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2940 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=879, Invalid=15377, Unknown=0, NotChecked=0, Total=16256 [2021-12-06 22:47:58,876 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 482 mSDsluCounter, 2296 mSDsCounter, 0 mSdLazyCounter, 6188 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 2342 SdHoareTripleChecker+Invalid, 6372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 6188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:47:58,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 2342 Invalid, 6372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 6188 Invalid, 0 Unknown, 69 Unchecked, 1.6s Time] [2021-12-06 22:47:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-12-06 22:47:58,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2021-12-06 22:47:58,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 159 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:47:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2021-12-06 22:47:58,878 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 150 [2021-12-06 22:47:58,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:47:58,878 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2021-12-06 22:47:58,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.340659340659341) internal successors, (304), 91 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) [2021-12-06 22:47:58,878 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2021-12-06 22:47:58,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-06 22:47:58,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:47:58,879 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:47:58,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-12-06 22:47:59,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:59,080 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:47:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:47:59,081 INFO L85 PathProgramCache]: Analyzing trace with hash 134141242, now seen corresponding path program 18 times [2021-12-06 22:47:59,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:47:59,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875780988] [2021-12-06 22:47:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:47:59,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:47:59,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:47:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 120 proven. 370 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 22:47:59,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:47:59,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875780988] [2021-12-06 22:47:59,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875780988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:47:59,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440737275] [2021-12-06 22:47:59,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:47:59,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:47:59,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:47:59,384 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:47:59,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-12-06 22:48:01,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-12-06 22:48:01,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:48:01,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 90 conjunts are in the unsatisfiable core [2021-12-06 22:48:01,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:48:01,600 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:48:01,600 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 [2021-12-06 22:48:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 153 proven. 337 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 22:48:02,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:48:03,574 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 190 proven. 300 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 22:48:03,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440737275] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:48:03,575 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:48:03,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 76 [2021-12-06 22:48:03,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917826944] [2021-12-06 22:48:03,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:48:03,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-06 22:48:03,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:48:03,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-06 22:48:03,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=700, Invalid=5152, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 22:48:03,576 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 77 states, 76 states have (on average 4.552631578947368) internal successors, (346), 77 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:04,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:48:04,924 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2021-12-06 22:48:04,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 22:48:04,925 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 4.552631578947368) internal successors, (346), 77 states have internal predecessors, (346), 0 states have call successors, (0), 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 154 [2021-12-06 22:48:04,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:48:04,925 INFO L225 Difference]: With dead ends: 163 [2021-12-06 22:48:04,925 INFO L226 Difference]: Without dead ends: 163 [2021-12-06 22:48:04,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2399, Invalid=9591, Unknown=0, NotChecked=0, Total=11990 [2021-12-06 22:48:04,926 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 526 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:48:04,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 478 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 22:48:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-06 22:48:04,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2021-12-06 22:48:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 160 states have (on average 1.025) internal successors, (164), 161 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:04,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 164 transitions. [2021-12-06 22:48:04,928 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 164 transitions. Word has length 154 [2021-12-06 22:48:04,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:48:04,928 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 164 transitions. [2021-12-06 22:48:04,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 4.552631578947368) internal successors, (346), 77 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:04,929 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 164 transitions. [2021-12-06 22:48:04,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-06 22:48:04,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:48:04,929 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:48:04,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-12-06 22:48:05,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-12-06 22:48:05,130 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:48:05,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:48:05,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1782331352, now seen corresponding path program 15 times [2021-12-06 22:48:05,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:48:05,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608303194] [2021-12-06 22:48:05,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:48:05,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:48:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 11 proven. 710 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:48:06,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:48:06,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608303194] [2021-12-06 22:48:06,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608303194] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:48:06,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068253069] [2021-12-06 22:48:06,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:48:06,305 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:06,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:48:06,305 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:48:06,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-12-06 22:48:08,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-06 22:48:08,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:48:08,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 162 conjunts are in the unsatisfiable core [2021-12-06 22:48:08,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:48:08,807 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 14 treesize of output 10 [2021-12-06 22:48:09,115 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 [2021-12-06 22:48:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 11 proven. 520 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 22:48:09,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:48:09,908 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 [2021-12-06 22:48:09,909 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 [2021-12-06 22:48:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 11 proven. 520 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-06 22:48:10,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068253069] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:48:10,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:48:10,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 32, 33] total 77 [2021-12-06 22:48:10,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102992592] [2021-12-06 22:48:10,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:48:10,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-12-06 22:48:10,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:48:10,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-12-06 22:48:10,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5632, Unknown=0, NotChecked=0, Total=5852 [2021-12-06 22:48:10,143 INFO L87 Difference]: Start difference. First operand 162 states and 164 transitions. Second operand has 77 states, 77 states have (on average 3.4545454545454546) internal successors, (266), 77 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:14,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:48:14,046 INFO L93 Difference]: Finished difference Result 437 states and 441 transitions. [2021-12-06 22:48:14,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-12-06 22:48:14,046 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.4545454545454546) internal successors, (266), 77 states have internal predecessors, (266), 0 states have call successors, (0), 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 158 [2021-12-06 22:48:14,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:48:14,047 INFO L225 Difference]: With dead ends: 437 [2021-12-06 22:48:14,047 INFO L226 Difference]: Without dead ends: 299 [2021-12-06 22:48:14,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 283 SyntacticMatches, 5 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3348 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1017, Invalid=17073, Unknown=0, NotChecked=0, Total=18090 [2021-12-06 22:48:14,048 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 986 mSDsluCounter, 2487 mSDsCounter, 0 mSdLazyCounter, 5443 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 986 SdHoareTripleChecker+Valid, 2535 SdHoareTripleChecker+Invalid, 7017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 5443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1357 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:48:14,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [986 Valid, 2535 Invalid, 7017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 5443 Invalid, 0 Unknown, 1357 Unchecked, 1.6s Time] [2021-12-06 22:48:14,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-12-06 22:48:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 166. [2021-12-06 22:48:14,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 164 states have (on average 1.024390243902439) internal successors, (168), 165 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2021-12-06 22:48:14,051 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 158 [2021-12-06 22:48:14,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:48:14,051 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2021-12-06 22:48:14,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.4545454545454546) internal successors, (266), 77 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:14,051 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2021-12-06 22:48:14,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-06 22:48:14,051 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:48:14,051 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:48:14,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-12-06 22:48:14,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-12-06 22:48:14,253 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:48:14,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:48:14,254 INFO L85 PathProgramCache]: Analyzing trace with hash 653883205, now seen corresponding path program 16 times [2021-12-06 22:48:14,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:48:14,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584831735] [2021-12-06 22:48:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:48:14,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:48:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 11 proven. 751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:48:15,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:48:15,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584831735] [2021-12-06 22:48:15,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584831735] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:48:15,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901617419] [2021-12-06 22:48:15,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:48:15,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:15,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:48:15,117 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:48:15,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-12-06 22:48:15,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:48:15,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:48:15,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-06 22:48:15,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:48:15,297 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:48:15,298 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 [2021-12-06 22:48:15,305 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 [2021-12-06 22:48:16,076 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 13 treesize of output 9 [2021-12-06 22:48:16,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 22:48:17,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:48:17,171 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-12-06 22:48:17,175 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 312 proven. 219 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:48:17,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:48:18,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:48:18,362 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-06 22:48:18,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:48:18,366 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 33 treesize of output 33 [2021-12-06 22:48:18,369 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 9 treesize of output 7 [2021-12-06 22:48:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 281 proven. 250 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:48:20,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901617419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:48:20,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:48:20,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 30, 30] total 95 [2021-12-06 22:48:20,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182120815] [2021-12-06 22:48:20,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:48:20,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-12-06 22:48:20,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:48:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-12-06 22:48:20,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=8334, Unknown=1, NotChecked=0, Total=8930 [2021-12-06 22:48:20,079 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand has 95 states, 95 states have (on average 4.147368421052631) internal successors, (394), 95 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:22,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:48:22,777 INFO L93 Difference]: Finished difference Result 291 states and 294 transitions. [2021-12-06 22:48:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 22:48:22,777 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 4.147368421052631) internal successors, (394), 95 states have internal predecessors, (394), 0 states have call successors, (0), 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 162 [2021-12-06 22:48:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:48:22,778 INFO L225 Difference]: With dead ends: 291 [2021-12-06 22:48:22,778 INFO L226 Difference]: Without dead ends: 173 [2021-12-06 22:48:22,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4184 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1475, Invalid=19116, Unknown=1, NotChecked=0, Total=20592 [2021-12-06 22:48:22,779 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 309 mSDsluCounter, 2059 mSDsCounter, 0 mSdLazyCounter, 2683 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 3079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 2683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:48:22,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 2110 Invalid, 3079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 2683 Invalid, 0 Unknown, 324 Unchecked, 0.8s Time] [2021-12-06 22:48:22,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-12-06 22:48:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2021-12-06 22:48:22,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 168 states have (on average 1.0238095238095237) internal successors, (172), 169 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2021-12-06 22:48:22,781 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 162 [2021-12-06 22:48:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:48:22,781 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2021-12-06 22:48:22,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 4.147368421052631) internal successors, (394), 95 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:22,782 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2021-12-06 22:48:22,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-06 22:48:22,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:48:22,782 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:48:22,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-12-06 22:48:22,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:22,983 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:48:22,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:48:22,983 INFO L85 PathProgramCache]: Analyzing trace with hash 918702882, now seen corresponding path program 17 times [2021-12-06 22:48:22,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:48:22,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630721105] [2021-12-06 22:48:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:48:22,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:48:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 153 proven. 419 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:48:23,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:48:23,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630721105] [2021-12-06 22:48:23,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630721105] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:48:23,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146682876] [2021-12-06 22:48:23,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:48:23,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:23,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:48:23,299 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:48:23,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-12-06 22:48:25,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-12-06 22:48:25,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:48:25,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 114 conjunts are in the unsatisfiable core [2021-12-06 22:48:25,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:48:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 190 proven. 382 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:48:25,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:48:26,311 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 21 treesize of output 17 [2021-12-06 22:48:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 190 proven. 382 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:48:26,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146682876] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:48:26,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:48:26,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 64 [2021-12-06 22:48:26,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040227917] [2021-12-06 22:48:26,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:48:26,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-12-06 22:48:26,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:48:26,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-12-06 22:48:26,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=3686, Unknown=0, NotChecked=0, Total=4160 [2021-12-06 22:48:26,819 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand has 65 states, 64 states have (on average 4.953125) internal successors, (317), 65 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) [2021-12-06 22:48:27,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:48:27,537 INFO L93 Difference]: Finished difference Result 178 states and 180 transitions. [2021-12-06 22:48:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 22:48:27,537 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 4.953125) internal successors, (317), 65 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 166 [2021-12-06 22:48:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:48:27,538 INFO L225 Difference]: With dead ends: 178 [2021-12-06 22:48:27,538 INFO L226 Difference]: Without dead ends: 178 [2021-12-06 22:48:27,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1508 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1079, Invalid=5401, Unknown=0, NotChecked=0, Total=6480 [2021-12-06 22:48:27,539 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 327 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1818 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 1885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:48:27,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 876 Invalid, 1885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1818 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:48:27,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-06 22:48:27,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2021-12-06 22:48:27,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 173 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:27,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 176 transitions. [2021-12-06 22:48:27,541 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 176 transitions. Word has length 166 [2021-12-06 22:48:27,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:48:27,541 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 176 transitions. [2021-12-06 22:48:27,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 4.953125) internal successors, (317), 65 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) [2021-12-06 22:48:27,541 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 176 transitions. [2021-12-06 22:48:27,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-06 22:48:27,542 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:48:27,542 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:48:27,563 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-12-06 22:48:27,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:27,743 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:48:27,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:48:27,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1889793213, now seen corresponding path program 19 times [2021-12-06 22:48:27,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:48:27,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559925464] [2021-12-06 22:48:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:48:27,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:48:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 153 proven. 441 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:48:28,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:48:28,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559925464] [2021-12-06 22:48:28,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559925464] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:48:28,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890912910] [2021-12-06 22:48:28,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:48:28,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:28,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:48:28,136 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:48:28,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-12-06 22:48:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:28,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 117 conjunts are in the unsatisfiable core [2021-12-06 22:48:28,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:48:28,287 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:48:28,288 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 [2021-12-06 22:48:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 190 proven. 404 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:48:29,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:48:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 231 proven. 363 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:48:30,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890912910] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:48:30,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:48:30,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 82 [2021-12-06 22:48:30,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429339407] [2021-12-06 22:48:30,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:48:30,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-12-06 22:48:30,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:48:30,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-12-06 22:48:30,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=6110, Unknown=0, NotChecked=0, Total=6806 [2021-12-06 22:48:30,456 INFO L87 Difference]: Start difference. First operand 174 states and 176 transitions. Second operand has 83 states, 82 states have (on average 4.585365853658536) internal successors, (376), 83 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) [2021-12-06 22:48:32,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:48:32,108 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2021-12-06 22:48:32,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-06 22:48:32,108 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 4.585365853658536) internal successors, (376), 83 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 168 [2021-12-06 22:48:32,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:48:32,109 INFO L225 Difference]: With dead ends: 177 [2021-12-06 22:48:32,109 INFO L226 Difference]: Without dead ends: 177 [2021-12-06 22:48:32,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3016 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2534, Invalid=11508, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 22:48:32,110 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 864 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 864 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 2109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:48:32,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [864 Valid, 899 Invalid, 2109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 1944 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:48:32,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-12-06 22:48:32,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2021-12-06 22:48:32,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 175 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2021-12-06 22:48:32,112 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 168 [2021-12-06 22:48:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:48:32,112 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2021-12-06 22:48:32,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 4.585365853658536) internal successors, (376), 83 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) [2021-12-06 22:48:32,112 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2021-12-06 22:48:32,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-12-06 22:48:32,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:48:32,113 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:48:32,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-12-06 22:48:32,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-12-06 22:48:32,314 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:48:32,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:48:32,315 INFO L85 PathProgramCache]: Analyzing trace with hash 538235313, now seen corresponding path program 18 times [2021-12-06 22:48:32,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:48:32,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161383571] [2021-12-06 22:48:32,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:48:32,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:48:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 12 proven. 627 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:48:32,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:48:32,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161383571] [2021-12-06 22:48:32,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161383571] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:48:32,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455159901] [2021-12-06 22:48:32,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:48:32,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:32,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:48:32,795 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:48:32,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-12-06 22:48:35,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-12-06 22:48:35,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:48:35,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 185 conjunts are in the unsatisfiable core [2021-12-06 22:48:35,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:48:35,878 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 [2021-12-06 22:48:35,881 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 [2021-12-06 22:48:37,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-12-06 22:48:37,636 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 14 treesize of output 10 [2021-12-06 22:48:39,176 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 [2021-12-06 22:48:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 12 proven. 858 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:48:39,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:48:40,823 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:48:40,823 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 [2021-12-06 22:48:40,860 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 [2021-12-06 22:48:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 12 proven. 627 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-12-06 22:48:42,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455159901] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:48:42,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:48:42,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 49, 36] total 108 [2021-12-06 22:48:42,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577791870] [2021-12-06 22:48:42,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:48:42,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-12-06 22:48:42,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:48:42,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-12-06 22:48:42,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=11227, Unknown=0, NotChecked=0, Total=11556 [2021-12-06 22:48:42,307 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand has 108 states, 108 states have (on average 3.9074074074074074) internal successors, (422), 108 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:50,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:48:50,180 INFO L93 Difference]: Finished difference Result 461 states and 466 transitions. [2021-12-06 22:48:50,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-12-06 22:48:50,181 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 3.9074074074074074) internal successors, (422), 108 states have internal predecessors, (422), 0 states have call successors, (0), 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 172 [2021-12-06 22:48:50,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:48:50,181 INFO L225 Difference]: With dead ends: 461 [2021-12-06 22:48:50,181 INFO L226 Difference]: Without dead ends: 187 [2021-12-06 22:48:50,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 268 SyntacticMatches, 16 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 13 DeprecatedPredicates, 8253 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1118, Invalid=34792, Unknown=0, NotChecked=0, Total=35910 [2021-12-06 22:48:50,184 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 283 mSDsluCounter, 2925 mSDsCounter, 0 mSdLazyCounter, 4736 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 2966 SdHoareTripleChecker+Invalid, 6242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 4736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1374 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:48:50,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 2966 Invalid, 6242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 4736 Invalid, 0 Unknown, 1374 Unchecked, 1.4s Time] [2021-12-06 22:48:50,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-12-06 22:48:50,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2021-12-06 22:48:50,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 182 states have (on average 1.021978021978022) internal successors, (186), 183 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) [2021-12-06 22:48:50,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 186 transitions. [2021-12-06 22:48:50,187 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 186 transitions. Word has length 172 [2021-12-06 22:48:50,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:48:50,187 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 186 transitions. [2021-12-06 22:48:50,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 3.9074074074074074) internal successors, (422), 108 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:50,188 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 186 transitions. [2021-12-06 22:48:50,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-12-06 22:48:50,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:48:50,189 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:48:50,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-12-06 22:48:50,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:50,390 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:48:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:48:50,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1528166187, now seen corresponding path program 19 times [2021-12-06 22:48:50,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:48:50,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221711130] [2021-12-06 22:48:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:48:50,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:48:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 190 proven. 494 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:48:50,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:48:50,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221711130] [2021-12-06 22:48:50,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221711130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:48:50,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131016976] [2021-12-06 22:48:50,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:48:50,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:50,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:48:50,788 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:48:50,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-12-06 22:48:50,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:50,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-06 22:48:50,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:48:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:48:51,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:48:51,954 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 [2021-12-06 22:48:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 231 proven. 453 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:48:52,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131016976] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:48:52,051 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:48:52,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 60 [2021-12-06 22:48:52,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240299994] [2021-12-06 22:48:52,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:48:52,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-06 22:48:52,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:48:52,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-06 22:48:52,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=3227, Unknown=0, NotChecked=0, Total=3660 [2021-12-06 22:48:52,053 INFO L87 Difference]: Start difference. First operand 184 states and 186 transitions. Second operand has 61 states, 60 states have (on average 4.6) internal successors, (276), 61 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:52,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:48:52,869 INFO L93 Difference]: Finished difference Result 192 states and 194 transitions. [2021-12-06 22:48:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 22:48:52,869 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 4.6) internal successors, (276), 61 states have internal predecessors, (276), 0 states have call successors, (0), 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 180 [2021-12-06 22:48:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:48:52,870 INFO L225 Difference]: With dead ends: 192 [2021-12-06 22:48:52,870 INFO L226 Difference]: Without dead ends: 192 [2021-12-06 22:48:52,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 326 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1110, Invalid=4896, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 22:48:52,871 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 512 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1926 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:48:52,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 881 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1926 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 22:48:52,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-12-06 22:48:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2021-12-06 22:48:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 186 states have (on average 1.021505376344086) internal successors, (190), 187 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 190 transitions. [2021-12-06 22:48:52,873 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 190 transitions. Word has length 180 [2021-12-06 22:48:52,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:48:52,873 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 190 transitions. [2021-12-06 22:48:52,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 4.6) internal successors, (276), 61 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 190 transitions. [2021-12-06 22:48:52,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-12-06 22:48:52,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:48:52,874 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:48:52,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-12-06 22:48:53,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:53,075 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:48:53,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:48:53,076 INFO L85 PathProgramCache]: Analyzing trace with hash -311109364, now seen corresponding path program 20 times [2021-12-06 22:48:53,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:48:53,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083041767] [2021-12-06 22:48:53,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:48:53,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:48:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 190 proven. 518 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:48:53,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:48:53,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083041767] [2021-12-06 22:48:53,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083041767] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:48:53,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252505463] [2021-12-06 22:48:53,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:48:53,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:53,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:48:53,484 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:48:53,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-12-06 22:48:53,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:48:53,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:48:53,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 123 conjunts are in the unsatisfiable core [2021-12-06 22:48:53,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:48:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 231 proven. 477 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:48:54,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:48:54,823 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 [2021-12-06 22:48:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 231 proven. 477 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:48:54,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252505463] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:48:54,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:48:54,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 62 [2021-12-06 22:48:54,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924750026] [2021-12-06 22:48:54,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:48:54,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 22:48:54,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:48:54,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 22:48:54,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=3545, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 22:48:54,905 INFO L87 Difference]: Start difference. First operand 188 states and 190 transitions. Second operand has 63 states, 62 states have (on average 4.467741935483871) internal successors, (277), 63 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:56,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:48:56,634 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2021-12-06 22:48:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 22:48:56,634 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 4.467741935483871) internal successors, (277), 63 states have internal predecessors, (277), 0 states have call successors, (0), 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 182 [2021-12-06 22:48:56,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:48:56,635 INFO L225 Difference]: With dead ends: 191 [2021-12-06 22:48:56,635 INFO L226 Difference]: Without dead ends: 191 [2021-12-06 22:48:56,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 329 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2007, Invalid=8295, Unknown=0, NotChecked=0, Total=10302 [2021-12-06 22:48:56,636 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 779 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:48:56,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 1056 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:48:56,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-06 22:48:56,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2021-12-06 22:48:56,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 189 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 192 transitions. [2021-12-06 22:48:56,638 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 192 transitions. Word has length 182 [2021-12-06 22:48:56,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:48:56,638 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 192 transitions. [2021-12-06 22:48:56,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 4.467741935483871) internal successors, (277), 63 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:48:56,638 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 192 transitions. [2021-12-06 22:48:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-12-06 22:48:56,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:48:56,639 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:48:56,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-12-06 22:48:56,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-12-06 22:48:56,840 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:48:56,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:48:56,841 INFO L85 PathProgramCache]: Analyzing trace with hash 101683962, now seen corresponding path program 20 times [2021-12-06 22:48:56,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:48:56,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087990774] [2021-12-06 22:48:56,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:48:56,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:48:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:48:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 13 proven. 744 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:48:57,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:48:57,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087990774] [2021-12-06 22:48:57,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087990774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:48:57,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931990383] [2021-12-06 22:48:57,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:48:57,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:48:57,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:48:57,377 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:48:57,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-12-06 22:48:57,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:48:57,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:48:57,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 904 conjuncts, 151 conjunts are in the unsatisfiable core [2021-12-06 22:48:57,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:48:57,591 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 [2021-12-06 22:48:58,144 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 14 treesize of output 10 [2021-12-06 22:48:58,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:48:58,413 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 [2021-12-06 22:48:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 13 proven. 744 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:48:58,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:48:58,547 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3182 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3182) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 12)) 0)) is different from false [2021-12-06 22:48:58,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:48:58,551 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:48:58,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:48:58,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:48:58,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:48:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 13 proven. 744 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:48:58,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931990383] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:48:58,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:48:58,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 57 [2021-12-06 22:48:58,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40148669] [2021-12-06 22:48:58,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:48:58,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-06 22:48:58,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:48:58,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-06 22:48:58,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2931, Unknown=1, NotChecked=108, Total=3192 [2021-12-06 22:48:58,933 INFO L87 Difference]: Start difference. First operand 190 states and 192 transitions. Second operand has 57 states, 57 states have (on average 3.824561403508772) internal successors, (218), 57 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:49:00,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:49:00,141 INFO L93 Difference]: Finished difference Result 328 states and 331 transitions. [2021-12-06 22:49:00,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 22:49:00,141 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.824561403508772) internal successors, (218), 57 states have internal predecessors, (218), 0 states have call successors, (0), 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 186 [2021-12-06 22:49:00,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:49:00,142 INFO L225 Difference]: With dead ends: 328 [2021-12-06 22:49:00,142 INFO L226 Difference]: Without dead ends: 197 [2021-12-06 22:49:00,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 347 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=251, Invalid=4864, Unknown=1, NotChecked=140, Total=5256 [2021-12-06 22:49:00,142 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 75 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 3321 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 3547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 211 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:49:00,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1693 Invalid, 3547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3321 Invalid, 0 Unknown, 211 Unchecked, 0.8s Time] [2021-12-06 22:49:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-12-06 22:49:00,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2021-12-06 22:49:00,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 192 states have (on average 1.0208333333333333) internal successors, (196), 193 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:49:00,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 196 transitions. [2021-12-06 22:49:00,144 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 196 transitions. Word has length 186 [2021-12-06 22:49:00,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:49:00,144 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 196 transitions. [2021-12-06 22:49:00,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.824561403508772) internal successors, (218), 57 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:49:00,145 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 196 transitions. [2021-12-06 22:49:00,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-12-06 22:49:00,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:49:00,145 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:49:00,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-12-06 22:49:00,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-12-06 22:49:00,347 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:49:00,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:49:00,348 INFO L85 PathProgramCache]: Analyzing trace with hash 721543127, now seen corresponding path program 21 times [2021-12-06 22:49:00,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:49:00,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125828165] [2021-12-06 22:49:00,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:00,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:49:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 231 proven. 575 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:49:00,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:49:00,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125828165] [2021-12-06 22:49:00,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125828165] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:49:00,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313368715] [2021-12-06 22:49:00,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:49:00,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:49:00,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:49:00,797 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:49:00,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-12-06 22:49:04,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-06 22:49:04,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:49:04,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 918 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-06 22:49:04,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:49:05,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 276 proven. 530 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:49:05,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:49:06,095 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 7 treesize of output 5 [2021-12-06 22:49:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 276 proven. 530 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-12-06 22:49:06,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313368715] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:49:06,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:49:06,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 77 [2021-12-06 22:49:06,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806624382] [2021-12-06 22:49:06,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:49:06,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-12-06 22:49:06,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:49:06,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-12-06 22:49:06,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=894, Invalid=5112, Unknown=0, NotChecked=0, Total=6006 [2021-12-06 22:49:06,193 INFO L87 Difference]: Start difference. First operand 194 states and 196 transitions. Second operand has 78 states, 77 states have (on average 4.805194805194805) internal successors, (370), 78 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:49:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:49:07,251 INFO L93 Difference]: Finished difference Result 202 states and 204 transitions. [2021-12-06 22:49:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-12-06 22:49:07,252 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 4.805194805194805) internal successors, (370), 78 states have internal predecessors, (370), 0 states have call successors, (0), 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 190 [2021-12-06 22:49:07,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:49:07,252 INFO L225 Difference]: With dead ends: 202 [2021-12-06 22:49:07,253 INFO L226 Difference]: Without dead ends: 202 [2021-12-06 22:49:07,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2409, Invalid=9147, Unknown=0, NotChecked=0, Total=11556 [2021-12-06 22:49:07,253 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 741 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 700 SdHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:49:07,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 700 Invalid, 1650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:49:07,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-06 22:49:07,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2021-12-06 22:49:07,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 197 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:49:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 200 transitions. [2021-12-06 22:49:07,255 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 200 transitions. Word has length 190 [2021-12-06 22:49:07,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:49:07,256 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 200 transitions. [2021-12-06 22:49:07,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 4.805194805194805) internal successors, (370), 78 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:49:07,256 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 200 transitions. [2021-12-06 22:49:07,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-12-06 22:49:07,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:49:07,257 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:49:07,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-12-06 22:49:07,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-12-06 22:49:07,457 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:49:07,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:49:07,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1913210552, now seen corresponding path program 21 times [2021-12-06 22:49:07,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:49:07,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068341151] [2021-12-06 22:49:07,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:07,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:49:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 39 proven. 1069 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:49:08,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:49:08,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068341151] [2021-12-06 22:49:08,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068341151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:49:08,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141901120] [2021-12-06 22:49:08,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:49:08,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:49:08,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:49:08,516 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:49:08,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-12-06 22:49:14,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-06 22:49:14,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:49:14,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 154 conjunts are in the unsatisfiable core [2021-12-06 22:49:14,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:49:15,262 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 14 treesize of output 10 [2021-12-06 22:49:15,582 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 [2021-12-06 22:49:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 39 proven. 744 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:49:15,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:49:15,888 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 [2021-12-06 22:49:15,889 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 [2021-12-06 22:49:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 39 proven. 744 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:49:16,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141901120] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:49:16,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:49:16,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 36, 36] total 76 [2021-12-06 22:49:16,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887278790] [2021-12-06 22:49:16,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:49:16,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-12-06 22:49:16,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:49:16,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-12-06 22:49:16,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=5477, Unknown=0, NotChecked=0, Total=5700 [2021-12-06 22:49:16,103 INFO L87 Difference]: Start difference. First operand 198 states and 200 transitions. Second operand has 76 states, 76 states have (on average 3.539473684210526) internal successors, (269), 76 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:49:19,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:49:19,682 INFO L93 Difference]: Finished difference Result 289 states and 291 transitions. [2021-12-06 22:49:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-12-06 22:49:19,683 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.539473684210526) internal successors, (269), 76 states have internal predecessors, (269), 0 states have call successors, (0), 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 192 [2021-12-06 22:49:19,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:49:19,684 INFO L225 Difference]: With dead ends: 289 [2021-12-06 22:49:19,684 INFO L226 Difference]: Without dead ends: 208 [2021-12-06 22:49:19,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 354 SyntacticMatches, 5 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2342 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=989, Invalid=13773, Unknown=0, NotChecked=0, Total=14762 [2021-12-06 22:49:19,685 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 482 mSDsluCounter, 2963 mSDsCounter, 0 mSdLazyCounter, 7558 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 7871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 7558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:49:19,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 3021 Invalid, 7871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 7558 Invalid, 0 Unknown, 198 Unchecked, 1.8s Time] [2021-12-06 22:49:19,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-12-06 22:49:19,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 202. [2021-12-06 22:49:19,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 200 states have (on average 1.02) internal successors, (204), 201 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:49:19,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 204 transitions. [2021-12-06 22:49:19,687 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 204 transitions. Word has length 192 [2021-12-06 22:49:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:49:19,687 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 204 transitions. [2021-12-06 22:49:19,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.539473684210526) internal successors, (269), 76 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:49:19,687 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 204 transitions. [2021-12-06 22:49:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-06 22:49:19,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:49:19,688 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:49:19,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-12-06 22:49:19,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-12-06 22:49:19,889 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:49:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:49:19,890 INFO L85 PathProgramCache]: Analyzing trace with hash -801501547, now seen corresponding path program 22 times [2021-12-06 22:49:19,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:49:19,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15000217] [2021-12-06 22:49:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:19,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:49:19,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 231 proven. 601 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:49:20,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:49:20,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15000217] [2021-12-06 22:49:20,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15000217] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:49:20,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495249418] [2021-12-06 22:49:20,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:49:20,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:49:20,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:49:20,365 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:49:20,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-12-06 22:49:20,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:49:20,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:49:20,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 285 conjunts are in the unsatisfiable core [2021-12-06 22:49:20,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:49:20,562 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:49:20,562 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 [2021-12-06 22:49:21,189 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 [2021-12-06 22:49:22,219 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-12-06 22:49:22,220 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 32 treesize of output 36 [2021-12-06 22:49:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 288 proven. 868 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:49:22,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:49:24,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:49:24,941 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 103 treesize of output 103 [2021-12-06 22:49:24,951 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 40 treesize of output 36 [2021-12-06 22:49:27,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 325 proven. 507 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:49:27,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495249418] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:49:27,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:49:27,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 50, 50] total 118 [2021-12-06 22:49:27,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396466674] [2021-12-06 22:49:27,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:49:27,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-06 22:49:27,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:49:27,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-06 22:49:27,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1160, Invalid=12882, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 22:49:27,503 INFO L87 Difference]: Start difference. First operand 202 states and 204 transitions. Second operand has 119 states, 118 states have (on average 3.6864406779661016) internal successors, (435), 119 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:49:33,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:49:33,766 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2021-12-06 22:49:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-06 22:49:33,767 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 3.6864406779661016) internal successors, (435), 119 states have internal predecessors, (435), 0 states have call successors, (0), 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 196 [2021-12-06 22:49:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:49:33,768 INFO L225 Difference]: With dead ends: 211 [2021-12-06 22:49:33,768 INFO L226 Difference]: Without dead ends: 211 [2021-12-06 22:49:33,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 306 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4807 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=3605, Invalid=21835, Unknown=0, NotChecked=0, Total=25440 [2021-12-06 22:49:33,769 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 1111 mSDsluCounter, 2665 mSDsCounter, 0 mSdLazyCounter, 7610 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 2722 SdHoareTripleChecker+Invalid, 8224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 7610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:49:33,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1111 Valid, 2722 Invalid, 8224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 7610 Invalid, 0 Unknown, 222 Unchecked, 2.8s Time] [2021-12-06 22:49:33,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-06 22:49:33,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2021-12-06 22:49:33,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 208 states have (on average 1.0240384615384615) internal successors, (213), 209 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) [2021-12-06 22:49:33,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 213 transitions. [2021-12-06 22:49:33,771 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 213 transitions. Word has length 196 [2021-12-06 22:49:33,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:49:33,771 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 213 transitions. [2021-12-06 22:49:33,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 3.6864406779661016) internal successors, (435), 119 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:49:33,771 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 213 transitions. [2021-12-06 22:49:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-06 22:49:33,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:49:33,772 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:49:33,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-12-06 22:49:33,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-12-06 22:49:33,973 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:49:33,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:49:33,975 INFO L85 PathProgramCache]: Analyzing trace with hash -256058365, now seen corresponding path program 22 times [2021-12-06 22:49:33,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:49:33,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682496357] [2021-12-06 22:49:33,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:49:33,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:49:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:49:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 14 proven. 871 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:49:34,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:49:34,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682496357] [2021-12-06 22:49:34,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682496357] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:49:34,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986741607] [2021-12-06 22:49:34,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:49:34,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:49:34,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:49:34,591 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:49:34,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-12-06 22:49:34,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:49:34,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:49:34,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-06 22:49:34,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:49:34,915 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 [2021-12-06 22:49:34,918 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 [2021-12-06 22:49:35,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 22:49:35,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:50:20,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:50:20,824 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2021-12-06 22:50:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 512 proven. 351 refuted. 22 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:50:20,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:50:22,446 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:50:22,447 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2021-12-06 22:50:22,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:50:22,451 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 33 treesize of output 33 [2021-12-06 22:50:22,454 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 9 treesize of output 7 [2021-12-06 22:50:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 458 proven. 427 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:50:24,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986741607] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:50:24,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:50:24,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 35] total 101 [2021-12-06 22:50:24,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490110837] [2021-12-06 22:50:24,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:50:24,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-06 22:50:24,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:50:24,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-06 22:50:24,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=9270, Unknown=4, NotChecked=0, Total=10100 [2021-12-06 22:50:24,780 INFO L87 Difference]: Start difference. First operand 210 states and 213 transitions. Second operand has 101 states, 101 states have (on average 4.396039603960396) internal successors, (444), 101 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:50:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:50:30,060 INFO L93 Difference]: Finished difference Result 358 states and 362 transitions. [2021-12-06 22:50:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-06 22:50:30,060 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 4.396039603960396) internal successors, (444), 101 states have internal predecessors, (444), 0 states have call successors, (0), 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 200 [2021-12-06 22:50:30,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:50:30,061 INFO L225 Difference]: With dead ends: 358 [2021-12-06 22:50:30,061 INFO L226 Difference]: Without dead ends: 217 [2021-12-06 22:50:30,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 348 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3135 ImplicationChecksByTransitivity, 51.5s TimeCoverageRelationStatistics Valid=1473, Invalid=16883, Unknown=4, NotChecked=0, Total=18360 [2021-12-06 22:50:30,062 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 118 mSDsluCounter, 2066 mSDsCounter, 0 mSdLazyCounter, 1584 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 2118 SdHoareTripleChecker+Invalid, 1773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 22:50:30,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 2118 Invalid, 1773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1584 Invalid, 0 Unknown, 177 Unchecked, 0.5s Time] [2021-12-06 22:50:30,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-06 22:50:30,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2021-12-06 22:50:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 212 states have (on average 1.0235849056603774) internal successors, (217), 213 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:50:30,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 217 transitions. [2021-12-06 22:50:30,065 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 217 transitions. Word has length 200 [2021-12-06 22:50:30,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:50:30,065 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 217 transitions. [2021-12-06 22:50:30,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 4.396039603960396) internal successors, (444), 101 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:50:30,065 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 217 transitions. [2021-12-06 22:50:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-06 22:50:30,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:50:30,066 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:50:30,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-12-06 22:50:30,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:50:30,267 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:50:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:50:30,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1009050144, now seen corresponding path program 23 times [2021-12-06 22:50:30,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:50:30,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129738595] [2021-12-06 22:50:30,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:50:30,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:50:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1263 backedges. 276 proven. 662 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:50:30,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:50:30,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129738595] [2021-12-06 22:50:30,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129738595] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:50:30,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247615172] [2021-12-06 22:50:30,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:50:30,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:50:30,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:50:30,773 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:50:30,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-12-06 22:50:33,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-12-06 22:50:33,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:50:33,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 141 conjunts are in the unsatisfiable core [2021-12-06 22:50:33,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:50:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1263 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:50:34,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:50:34,862 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 21 treesize of output 17 [2021-12-06 22:50:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1263 backedges. 325 proven. 613 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-06 22:50:35,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247615172] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:50:35,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:50:35,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 79 [2021-12-06 22:50:35,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948743512] [2021-12-06 22:50:35,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:50:35,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-06 22:50:35,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:50:35,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-06 22:50:35,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=5618, Unknown=0, NotChecked=0, Total=6320 [2021-12-06 22:50:35,596 INFO L87 Difference]: Start difference. First operand 214 states and 217 transitions. Second operand has 80 states, 79 states have (on average 5.0) internal successors, (395), 80 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:50:36,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:50:36,931 INFO L93 Difference]: Finished difference Result 215 states and 217 transitions. [2021-12-06 22:50:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 22:50:36,932 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 5.0) internal successors, (395), 80 states have internal predecessors, (395), 0 states have call successors, (0), 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 204 [2021-12-06 22:50:36,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:50:36,933 INFO L225 Difference]: With dead ends: 215 [2021-12-06 22:50:36,933 INFO L226 Difference]: Without dead ends: 215 [2021-12-06 22:50:36,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 360 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2363 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1565, Invalid=8137, Unknown=0, NotChecked=0, Total=9702 [2021-12-06 22:50:36,933 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 579 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 3223 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 3339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:50:36,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [579 Valid, 1480 Invalid, 3339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3223 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-06 22:50:36,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-06 22:50:36,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2021-12-06 22:50:36,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 212 states have (on average 1.0188679245283019) internal successors, (216), 213 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:50:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 216 transitions. [2021-12-06 22:50:36,936 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 216 transitions. Word has length 204 [2021-12-06 22:50:36,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:50:36,936 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 216 transitions. [2021-12-06 22:50:36,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 5.0) internal successors, (395), 80 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:50:36,937 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 216 transitions. [2021-12-06 22:50:36,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-12-06 22:50:36,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:50:36,938 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:50:36,961 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-12-06 22:50:37,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:50:37,138 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:50:37,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:50:37,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1998434863, now seen corresponding path program 24 times [2021-12-06 22:50:37,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:50:37,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444084214] [2021-12-06 22:50:37,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:50:37,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:50:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 590 proven. 380 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:50:37,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:50:37,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444084214] [2021-12-06 22:50:37,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444084214] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:50:37,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904603944] [2021-12-06 22:50:37,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:50:37,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:50:37,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:50:37,521 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:50:37,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-12-06 22:50:50,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-06 22:50:50,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:50:50,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 1020 conjuncts, 115 conjunts are in the unsatisfiable core [2021-12-06 22:50:50,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:50:50,521 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:50:50,521 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 [2021-12-06 22:50:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 631 proven. 339 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:50:51,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:50:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 631 proven. 339 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:50:52,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904603944] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:50:52,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:50:52,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 34] total 85 [2021-12-06 22:50:52,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582786233] [2021-12-06 22:50:52,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:50:52,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-12-06 22:50:52,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:50:52,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-12-06 22:50:52,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=5909, Unknown=0, NotChecked=0, Total=7140 [2021-12-06 22:50:52,336 INFO L87 Difference]: Start difference. First operand 214 states and 216 transitions. Second operand has 85 states, 85 states have (on average 4.4) internal successors, (374), 85 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:50:53,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:50:53,189 INFO L93 Difference]: Finished difference Result 311 states and 313 transitions. [2021-12-06 22:50:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 22:50:53,189 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 4.4) internal successors, (374), 85 states have internal predecessors, (374), 0 states have call successors, (0), 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 210 [2021-12-06 22:50:53,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:50:53,190 INFO L225 Difference]: With dead ends: 311 [2021-12-06 22:50:53,190 INFO L226 Difference]: Without dead ends: 221 [2021-12-06 22:50:53,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4114 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2121, Invalid=8591, Unknown=0, NotChecked=0, Total=10712 [2021-12-06 22:50:53,191 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 226 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 1219 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 22:50:53,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 570 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 22:50:53,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-06 22:50:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 218. [2021-12-06 22:50:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 216 states have (on average 1.0185185185185186) internal successors, (220), 217 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:50:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 220 transitions. [2021-12-06 22:50:53,193 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 220 transitions. Word has length 210 [2021-12-06 22:50:53,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:50:53,193 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 220 transitions. [2021-12-06 22:50:53,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 4.4) internal successors, (374), 85 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:50:53,194 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 220 transitions. [2021-12-06 22:50:53,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-06 22:50:53,194 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:50:53,194 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:50:53,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-12-06 22:50:53,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:50:53,395 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:50:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:50:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1173454028, now seen corresponding path program 25 times [2021-12-06 22:50:53,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:50:53,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125976427] [2021-12-06 22:50:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:50:53,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:50:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 15 proven. 1008 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:50:54,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:50:54,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125976427] [2021-12-06 22:50:54,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125976427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:50:54,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766672836] [2021-12-06 22:50:54,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:50:54,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:50:54,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:50:54,159 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:50:54,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-12-06 22:50:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:54,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 173 conjunts are in the unsatisfiable core [2021-12-06 22:50:54,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:50:54,410 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 [2021-12-06 22:50:55,158 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 14 treesize of output 10 [2021-12-06 22:50:55,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 22:50:55,464 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 [2021-12-06 22:50:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 15 proven. 1008 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:50:55,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:50:55,632 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4064 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_4064) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 14)) 0)) is different from false [2021-12-06 22:50:55,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:50:55,639 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:50:55,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:50:55,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:50:55,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:50:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1401 backedges. 15 proven. 1008 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:50:56,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766672836] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:50:56,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:50:56,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 63 [2021-12-06 22:50:56,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949978878] [2021-12-06 22:50:56,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:50:56,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-12-06 22:50:56,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:50:56,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-12-06 22:50:56,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3619, Unknown=1, NotChecked=120, Total=3906 [2021-12-06 22:50:56,140 INFO L87 Difference]: Start difference. First operand 218 states and 220 transitions. Second operand has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 63 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) [2021-12-06 22:50:58,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:50:58,405 INFO L93 Difference]: Finished difference Result 376 states and 379 transitions. [2021-12-06 22:50:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 22:50:58,405 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 63 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 214 [2021-12-06 22:50:58,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:50:58,406 INFO L225 Difference]: With dead ends: 376 [2021-12-06 22:50:58,406 INFO L226 Difference]: Without dead ends: 225 [2021-12-06 22:50:58,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 401 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=394, Invalid=8729, Unknown=1, NotChecked=188, Total=9312 [2021-12-06 22:50:58,407 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 204 mSDsluCounter, 2260 mSDsCounter, 0 mSdLazyCounter, 4777 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 2315 SdHoareTripleChecker+Invalid, 4986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 4777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:50:58,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 2315 Invalid, 4986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 4777 Invalid, 0 Unknown, 162 Unchecked, 1.3s Time] [2021-12-06 22:50:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-12-06 22:50:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2021-12-06 22:50:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 220 states have (on average 1.018181818181818) internal successors, (224), 221 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:50:58,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2021-12-06 22:50:58,409 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 214 [2021-12-06 22:50:58,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:50:58,409 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2021-12-06 22:50:58,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.9047619047619047) internal successors, (246), 63 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) [2021-12-06 22:50:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2021-12-06 22:50:58,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-06 22:50:58,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:50:58,410 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:50:58,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-12-06 22:50:58,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:50:58,611 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:50:58,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:50:58,613 INFO L85 PathProgramCache]: Analyzing trace with hash -843969495, now seen corresponding path program 26 times [2021-12-06 22:50:58,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:50:58,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941556220] [2021-12-06 22:50:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:50:58,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:50:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:50:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 325 proven. 755 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:50:59,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:50:59,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941556220] [2021-12-06 22:50:59,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941556220] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:50:59,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741547383] [2021-12-06 22:50:59,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:50:59,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:50:59,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:50:59,180 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:50:59,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-12-06 22:50:59,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:50:59,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:50:59,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 146 conjunts are in the unsatisfiable core [2021-12-06 22:50:59,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:51:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 378 proven. 702 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:51:00,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:51:00,795 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 [2021-12-06 22:51:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 378 proven. 702 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-12-06 22:51:00,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741547383] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:51:00,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:51:00,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 72 [2021-12-06 22:51:00,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252429343] [2021-12-06 22:51:00,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:51:00,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-12-06 22:51:00,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:51:00,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-12-06 22:51:00,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=4634, Unknown=0, NotChecked=0, Total=5256 [2021-12-06 22:51:00,920 INFO L87 Difference]: Start difference. First operand 222 states and 224 transitions. Second operand has 73 states, 72 states have (on average 4.666666666666667) internal successors, (336), 73 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:51:02,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:51:02,075 INFO L93 Difference]: Finished difference Result 230 states and 232 transitions. [2021-12-06 22:51:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-12-06 22:51:02,075 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 4.666666666666667) internal successors, (336), 73 states have internal predecessors, (336), 0 states have call successors, (0), 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 218 [2021-12-06 22:51:02,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:51:02,076 INFO L225 Difference]: With dead ends: 230 [2021-12-06 22:51:02,076 INFO L226 Difference]: Without dead ends: 230 [2021-12-06 22:51:02,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 396 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1569, Invalid=6987, Unknown=0, NotChecked=0, Total=8556 [2021-12-06 22:51:02,077 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 1005 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 2565 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1005 SdHoareTripleChecker+Valid, 1158 SdHoareTripleChecker+Invalid, 2757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 22:51:02,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1005 Valid, 1158 Invalid, 2757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2565 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-06 22:51:02,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-12-06 22:51:02,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 226. [2021-12-06 22:51:02,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 1.0178571428571428) internal successors, (228), 225 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) [2021-12-06 22:51:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 228 transitions. [2021-12-06 22:51:02,079 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 228 transitions. Word has length 218 [2021-12-06 22:51:02,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:51:02,079 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 228 transitions. [2021-12-06 22:51:02,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 4.666666666666667) internal successors, (336), 73 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:51:02,080 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 228 transitions. [2021-12-06 22:51:02,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-06 22:51:02,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:51:02,080 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:51:02,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-12-06 22:51:02,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:51:02,282 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:51:02,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:51:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash 694134410, now seen corresponding path program 23 times [2021-12-06 22:51:02,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:51:02,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494282433] [2021-12-06 22:51:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:51:02,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:51:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 45 proven. 1443 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:51:03,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:51:03,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494282433] [2021-12-06 22:51:03,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494282433] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:51:03,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574164133] [2021-12-06 22:51:03,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:51:03,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:51:03,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:51:03,856 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:51:03,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-12-06 22:51:07,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-12-06 22:51:07,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:51:07,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 326 conjunts are in the unsatisfiable core [2021-12-06 22:51:07,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:51:08,682 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 14 treesize of output 10 [2021-12-06 22:51:09,115 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 [2021-12-06 22:51:09,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 45 proven. 1442 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:51:09,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:51:11,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:51:11,400 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 103 treesize of output 103 [2021-12-06 22:51:11,424 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 40 treesize of output 36 [2021-12-06 22:51:11,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:51:11,441 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 60 treesize of output 56 [2021-12-06 22:51:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 45 proven. 1008 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-06 22:51:11,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574164133] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:51:11,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:51:11,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 54, 54] total 126 [2021-12-06 22:51:11,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910271984] [2021-12-06 22:51:11,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:51:11,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-12-06 22:51:11,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:51:11,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-12-06 22:51:11,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=15377, Unknown=0, NotChecked=0, Total=15750 [2021-12-06 22:51:11,769 INFO L87 Difference]: Start difference. First operand 226 states and 228 transitions. Second operand has 126 states, 126 states have (on average 3.5238095238095237) internal successors, (444), 126 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:51:19,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:51:19,422 INFO L93 Difference]: Finished difference Result 329 states and 331 transitions. [2021-12-06 22:51:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-12-06 22:51:19,422 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 3.5238095238095237) internal successors, (444), 126 states have internal predecessors, (444), 0 states have call successors, (0), 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 220 [2021-12-06 22:51:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:51:19,423 INFO L225 Difference]: With dead ends: 329 [2021-12-06 22:51:19,423 INFO L226 Difference]: Without dead ends: 236 [2021-12-06 22:51:19,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 367 SyntacticMatches, 4 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5404 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1231, Invalid=30275, Unknown=0, NotChecked=0, Total=31506 [2021-12-06 22:51:19,425 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 548 mSDsluCounter, 5213 mSDsCounter, 0 mSdLazyCounter, 13858 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 5279 SdHoareTripleChecker+Invalid, 14422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 13858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-06 22:51:19,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [548 Valid, 5279 Invalid, 14422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 13858 Invalid, 0 Unknown, 442 Unchecked, 4.0s Time] [2021-12-06 22:51:19,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-06 22:51:19,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 230. [2021-12-06 22:51:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 228 states have (on average 1.0175438596491229) internal successors, (232), 229 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) [2021-12-06 22:51:19,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 232 transitions. [2021-12-06 22:51:19,427 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 232 transitions. Word has length 220 [2021-12-06 22:51:19,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:51:19,427 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 232 transitions. [2021-12-06 22:51:19,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 3.5238095238095237) internal successors, (444), 126 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:51:19,427 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 232 transitions. [2021-12-06 22:51:19,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-12-06 22:51:19,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:51:19,428 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:51:19,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-12-06 22:51:19,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-12-06 22:51:19,629 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:51:19,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:51:19,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1518924007, now seen corresponding path program 24 times [2021-12-06 22:51:19,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:51:19,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4236456] [2021-12-06 22:51:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:51:19,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:51:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 325 proven. 785 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-06 22:51:20,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:51:20,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4236456] [2021-12-06 22:51:20,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4236456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:51:20,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657426653] [2021-12-06 22:51:20,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:51:20,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:51:20,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:51:20,213 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:51:20,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-12-06 22:51:49,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-12-06 22:51:49,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:51:49,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 125 conjunts are in the unsatisfiable core [2021-12-06 22:51:49,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:51:49,868 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:51:49,868 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 [2021-12-06 22:51:51,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 378 proven. 732 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-06 22:51:51,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:51:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 435 proven. 675 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-06 22:51:53,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657426653] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:51:53,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:51:53,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 107 [2021-12-06 22:51:53,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490405503] [2021-12-06 22:51:53,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:51:53,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-12-06 22:51:53,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:51:53,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-12-06 22:51:53,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1544, Invalid=10012, Unknown=0, NotChecked=0, Total=11556 [2021-12-06 22:51:53,420 INFO L87 Difference]: Start difference. First operand 230 states and 232 transitions. Second operand has 108 states, 107 states have (on average 4.635514018691588) internal successors, (496), 108 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:51:55,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:51:55,268 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2021-12-06 22:51:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-06 22:51:55,269 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 4.635514018691588) internal successors, (496), 108 states have internal predecessors, (496), 0 states have call successors, (0), 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 224 [2021-12-06 22:51:55,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:51:55,270 INFO L225 Difference]: With dead ends: 233 [2021-12-06 22:51:55,270 INFO L226 Difference]: Without dead ends: 233 [2021-12-06 22:51:55,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5553 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4032, Invalid=15990, Unknown=0, NotChecked=0, Total=20022 [2021-12-06 22:51:55,271 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 915 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1867 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 2058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:51:55,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [915 Valid, 832 Invalid, 2058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1867 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-06 22:51:55,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-12-06 22:51:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2021-12-06 22:51:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 230 states have (on average 1.017391304347826) internal successors, (234), 231 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:51:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 234 transitions. [2021-12-06 22:51:55,273 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 234 transitions. Word has length 224 [2021-12-06 22:51:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:51:55,273 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 234 transitions. [2021-12-06 22:51:55,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 4.635514018691588) internal successors, (496), 108 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:51:55,273 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 234 transitions. [2021-12-06 22:51:55,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-06 22:51:55,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:51:55,277 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:51:55,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-12-06 22:51:55,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-12-06 22:51:55,478 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:51:55,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:51:55,478 INFO L85 PathProgramCache]: Analyzing trace with hash 424559957, now seen corresponding path program 27 times [2021-12-06 22:51:55,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:51:55,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118197051] [2021-12-06 22:51:55,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:51:55,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:51:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:51:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 16 proven. 1155 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-12-06 22:51:56,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:51:56,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118197051] [2021-12-06 22:51:56,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118197051] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:51:56,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576044453] [2021-12-06 22:51:56,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:51:56,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:51:56,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:51:56,269 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:51:56,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-12-06 22:52:05,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-12-06 22:52:05,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:52:05,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 1099 conjuncts, 108 conjunts are in the unsatisfiable core [2021-12-06 22:52:05,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:52:05,082 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:52:05,083 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 [2021-12-06 22:52:06,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:52:06,130 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-12-06 22:52:06,130 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 25 treesize of output 24 [2021-12-06 22:52:06,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:52:06,352 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 21 treesize of output 21 [2021-12-06 22:52:06,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 72 proven. 31 refuted. 0 times theorem prover too weak. 1503 trivial. 0 not checked. [2021-12-06 22:52:06,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:52:07,583 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 56 treesize of output 50 [2021-12-06 22:52:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1606 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2021-12-06 22:52:11,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576044453] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:52:11,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:52:11,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 10, 11] total 59 [2021-12-06 22:52:11,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201605301] [2021-12-06 22:52:11,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:52:11,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-12-06 22:52:11,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:52:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-12-06 22:52:11,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3269, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 22:52:11,695 INFO L87 Difference]: Start difference. First operand 232 states and 234 transitions. Second operand has 59 states, 59 states have (on average 4.0) internal successors, (236), 59 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:52:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:52:16,520 INFO L93 Difference]: Finished difference Result 399 states and 402 transitions. [2021-12-06 22:52:16,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-12-06 22:52:16,520 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 4.0) internal successors, (236), 59 states have internal predecessors, (236), 0 states have call successors, (0), 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 228 [2021-12-06 22:52:16,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:52:16,521 INFO L225 Difference]: With dead ends: 399 [2021-12-06 22:52:16,521 INFO L226 Difference]: Without dead ends: 238 [2021-12-06 22:52:16,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3178 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1264, Invalid=17096, Unknown=0, NotChecked=0, Total=18360 [2021-12-06 22:52:16,523 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 175 mSDsluCounter, 1616 mSDsCounter, 0 mSdLazyCounter, 5769 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 6113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 5769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:52:16,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 1654 Invalid, 6113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 5769 Invalid, 0 Unknown, 274 Unchecked, 1.8s Time] [2021-12-06 22:52:16,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-12-06 22:52:16,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2021-12-06 22:52:16,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0128205128205128) internal successors, (237), 234 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:52:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2021-12-06 22:52:16,525 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 228 [2021-12-06 22:52:16,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:52:16,525 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2021-12-06 22:52:16,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 4.0) internal successors, (236), 59 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:52:16,525 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2021-12-06 22:52:16,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-06 22:52:16,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:52:16,526 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:52:16,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-12-06 22:52:16,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:52:16,727 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:52:16,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:52:16,728 INFO L85 PathProgramCache]: Analyzing trace with hash 927627795, now seen corresponding path program 25 times [2021-12-06 22:52:16,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:52:16,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600598649] [2021-12-06 22:52:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:16,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:52:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 48 proven. 1651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:52:18,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:52:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600598649] [2021-12-06 22:52:18,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600598649] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:52:18,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800278117] [2021-12-06 22:52:18,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 22:52:18,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:52:18,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:52:18,429 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:52:18,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-06 22:52:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:18,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 1127 conjuncts, 344 conjunts are in the unsatisfiable core [2021-12-06 22:52:18,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:52:19,949 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 14 treesize of output 10 [2021-12-06 22:52:20,415 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 [2021-12-06 22:52:20,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 48 proven. 1650 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:52:20,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:52:22,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:52:22,912 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 103 treesize of output 103 [2021-12-06 22:52:22,941 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 40 treesize of output 36 [2021-12-06 22:52:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1699 backedges. 48 proven. 1155 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-06 22:52:23,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800278117] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:52:23,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:52:23,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 57, 57] total 133 [2021-12-06 22:52:23,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735693410] [2021-12-06 22:52:23,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:52:23,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2021-12-06 22:52:23,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:52:23,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-12-06 22:52:23,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=17162, Unknown=0, NotChecked=0, Total=17556 [2021-12-06 22:52:23,312 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand has 133 states, 133 states have (on average 3.5488721804511276) internal successors, (472), 133 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:52:32,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:52:32,034 INFO L93 Difference]: Finished difference Result 344 states and 346 transitions. [2021-12-06 22:52:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-12-06 22:52:32,035 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.5488721804511276) internal successors, (472), 133 states have internal predecessors, (472), 0 states have call successors, (0), 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 234 [2021-12-06 22:52:32,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:52:32,036 INFO L225 Difference]: With dead ends: 344 [2021-12-06 22:52:32,036 INFO L226 Difference]: Without dead ends: 245 [2021-12-06 22:52:32,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 391 SyntacticMatches, 4 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6044 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1319, Invalid=33837, Unknown=0, NotChecked=0, Total=35156 [2021-12-06 22:52:32,037 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 697 mSDsluCounter, 5731 mSDsCounter, 0 mSdLazyCounter, 15823 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 5800 SdHoareTripleChecker+Invalid, 16298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 15823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 310 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:52:32,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 5800 Invalid, 16298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 15823 Invalid, 0 Unknown, 310 Unchecked, 4.6s Time] [2021-12-06 22:52:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-12-06 22:52:32,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 239. [2021-12-06 22:52:32,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0126050420168067) internal successors, (241), 238 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:52:32,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2021-12-06 22:52:32,040 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 234 [2021-12-06 22:52:32,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:52:32,040 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2021-12-06 22:52:32,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.5488721804511276) internal successors, (472), 133 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:52:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2021-12-06 22:52:32,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-06 22:52:32,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:52:32,041 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:52:32,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-12-06 22:52:32,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:52:32,242 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:52:32,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:52:32,243 INFO L85 PathProgramCache]: Analyzing trace with hash -269468240, now seen corresponding path program 26 times [2021-12-06 22:52:32,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:52:32,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617849229] [2021-12-06 22:52:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:32,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:52:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 378 proven. 886 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-06 22:52:32,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:52:32,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617849229] [2021-12-06 22:52:32,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617849229] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:52:32,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547685194] [2021-12-06 22:52:32,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 22:52:32,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:52:32,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:52:32,933 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:52:32,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-06 22:52:33,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 22:52:33,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:52:33,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1141 conjuncts, 159 conjunts are in the unsatisfiable core [2021-12-06 22:52:33,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:52:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 435 proven. 829 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-06 22:52:33,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:52:34,808 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 [2021-12-06 22:52:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 435 proven. 829 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-06 22:52:34,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547685194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:52:34,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:52:34,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 78 [2021-12-06 22:52:34,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476461298] [2021-12-06 22:52:34,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:52:34,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-12-06 22:52:34,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:52:34,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-12-06 22:52:34,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=5599, Unknown=0, NotChecked=0, Total=6162 [2021-12-06 22:52:34,940 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand has 79 states, 78 states have (on average 4.576923076923077) internal successors, (357), 79 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:52:37,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:52:37,958 INFO L93 Difference]: Finished difference Result 246 states and 248 transitions. [2021-12-06 22:52:37,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-12-06 22:52:37,958 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 4.576923076923077) internal successors, (357), 79 states have internal predecessors, (357), 0 states have call successors, (0), 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 238 [2021-12-06 22:52:37,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:52:37,959 INFO L225 Difference]: With dead ends: 246 [2021-12-06 22:52:37,959 INFO L226 Difference]: Without dead ends: 246 [2021-12-06 22:52:37,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 433 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3291, Invalid=13479, Unknown=0, NotChecked=0, Total=16770 [2021-12-06 22:52:37,960 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 785 mSDsluCounter, 1437 mSDsCounter, 0 mSdLazyCounter, 3282 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 1496 SdHoareTripleChecker+Invalid, 3445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 3282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-06 22:52:37,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [785 Valid, 1496 Invalid, 3445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 3282 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-06 22:52:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-06 22:52:37,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-12-06 22:52:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0122950819672132) internal successors, (247), 244 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:52:37,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2021-12-06 22:52:37,962 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 238 [2021-12-06 22:52:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:52:37,962 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2021-12-06 22:52:37,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 4.576923076923077) internal successors, (357), 79 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:52:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2021-12-06 22:52:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-12-06 22:52:37,963 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:52:37,963 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:52:37,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-12-06 22:52:38,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:52:38,164 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:52:38,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:52:38,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1923803457, now seen corresponding path program 27 times [2021-12-06 22:52:38,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:52:38,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434397447] [2021-12-06 22:52:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:52:38,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:52:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:52:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 786 proven. 577 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-12-06 22:52:38,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:52:38,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434397447] [2021-12-06 22:52:38,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434397447] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:52:38,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597582824] [2021-12-06 22:52:38,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 22:52:38,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:52:38,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:52:38,768 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:52:38,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-06 22:52:54,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-06 22:52:54,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:52:54,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 217 conjunts are in the unsatisfiable core [2021-12-06 22:52:54,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:52:54,637 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:52:54,638 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 [2021-12-06 22:52:56,619 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 14 treesize of output 10 [2021-12-06 22:52:56,682 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:52:56,682 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 17 treesize of output 23 [2021-12-06 22:52:56,692 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 8 treesize of output 3 [2021-12-06 22:53:01,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:53:01,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:53:01,110 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 21 treesize of output 14 [2021-12-06 22:53:01,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 34 proven. 1825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:01,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:53:02,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:53:02,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-06 22:53:02,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:53:02,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-06 22:53:02,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 22:53:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1859 backedges. 51 proven. 1808 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:07,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597582824] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:53:07,578 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:53:07,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 61, 61] total 157 [2021-12-06 22:53:07,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913402114] [2021-12-06 22:53:07,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:53:07,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2021-12-06 22:53:07,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:07,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2021-12-06 22:53:07,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1389, Invalid=23018, Unknown=85, NotChecked=0, Total=24492 [2021-12-06 22:53:07,583 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand has 157 states, 157 states have (on average 4.197452229299363) internal successors, (659), 157 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:12,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:53:12,663 INFO L93 Difference]: Finished difference Result 433 states and 437 transitions. [2021-12-06 22:53:12,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-12-06 22:53:12,664 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 4.197452229299363) internal successors, (659), 157 states have internal predecessors, (659), 0 states have call successors, (0), 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 244 [2021-12-06 22:53:12,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:53:12,665 INFO L225 Difference]: With dead ends: 433 [2021-12-06 22:53:12,665 INFO L226 Difference]: Without dead ends: 252 [2021-12-06 22:53:12,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 399 SyntacticMatches, 1 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13289 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2918, Invalid=43007, Unknown=85, NotChecked=0, Total=46010 [2021-12-06 22:53:12,667 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 572 mSDsluCounter, 3458 mSDsCounter, 0 mSdLazyCounter, 4067 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 572 SdHoareTripleChecker+Valid, 3516 SdHoareTripleChecker+Invalid, 8660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4494 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 22:53:12,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [572 Valid, 3516 Invalid, 8660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4067 Invalid, 0 Unknown, 4494 Unchecked, 1.3s Time] [2021-12-06 22:53:12,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-06 22:53:12,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 249. [2021-12-06 22:53:12,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0120967741935485) internal successors, (251), 248 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:12,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2021-12-06 22:53:12,669 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 244 [2021-12-06 22:53:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:53:12,669 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2021-12-06 22:53:12,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 4.197452229299363) internal successors, (659), 157 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2021-12-06 22:53:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-12-06 22:53:12,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:53:12,670 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:53:12,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-12-06 22:53:12,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:53:12,871 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:53:12,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:12,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1518197412, now seen corresponding path program 28 times [2021-12-06 22:53:12,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:12,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363055371] [2021-12-06 22:53:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:12,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:14,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 51 proven. 1873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 22:53:14,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:14,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363055371] [2021-12-06 22:53:14,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363055371] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:53:14,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136638194] [2021-12-06 22:53:14,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 22:53:14,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:53:14,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:53:14,700 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:53:14,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-06 22:53:14,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 22:53:14,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:53:14,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 317 conjunts are in the unsatisfiable core [2021-12-06 22:53:14,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:53:14,953 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:53:14,953 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 [2021-12-06 22:53:17,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:53:19,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 22:53:20,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 22:53:20,040 INFO L354 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2021-12-06 22:53:20,040 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 28 treesize of output 13 [2021-12-06 22:53:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 788 proven. 1135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 22:53:20,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:53:25,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:53:25,490 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 99 treesize of output 99 [2021-12-06 22:53:25,504 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 34 treesize of output 32 [2021-12-06 22:53:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 51 proven. 1312 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-06 22:53:28,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136638194] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:53:28,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:53:28,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 61, 61] total 178 [2021-12-06 22:53:28,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829093101] [2021-12-06 22:53:28,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:53:28,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2021-12-06 22:53:28,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:28,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2021-12-06 22:53:28,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=30046, Unknown=0, NotChecked=0, Total=31506 [2021-12-06 22:53:28,827 INFO L87 Difference]: Start difference. First operand 249 states and 251 transitions. Second operand has 178 states, 178 states have (on average 3.7247191011235956) internal successors, (663), 178 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:38,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:53:38,516 INFO L93 Difference]: Finished difference Result 364 states and 366 transitions. [2021-12-06 22:53:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-12-06 22:53:38,516 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 3.7247191011235956) internal successors, (663), 178 states have internal predecessors, (663), 0 states have call successors, (0), 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 248 [2021-12-06 22:53:38,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:53:38,517 INFO L225 Difference]: With dead ends: 364 [2021-12-06 22:53:38,517 INFO L226 Difference]: Without dead ends: 259 [2021-12-06 22:53:38,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17186 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=3964, Invalid=69206, Unknown=0, NotChecked=0, Total=73170 [2021-12-06 22:53:38,520 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 542 mSDsluCounter, 5637 mSDsCounter, 0 mSdLazyCounter, 8151 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 5710 SdHoareTripleChecker+Invalid, 9125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 8151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 865 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-06 22:53:38,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 5710 Invalid, 9125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 8151 Invalid, 0 Unknown, 865 Unchecked, 2.6s Time] [2021-12-06 22:53:38,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-12-06 22:53:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 253. [2021-12-06 22:53:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.0119047619047619) internal successors, (255), 252 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:38,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 255 transitions. [2021-12-06 22:53:38,523 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 255 transitions. Word has length 248 [2021-12-06 22:53:38,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:53:38,523 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 255 transitions. [2021-12-06 22:53:38,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 3.7247191011235956) internal successors, (663), 178 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 255 transitions. [2021-12-06 22:53:38,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-06 22:53:38,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:53:38,524 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:53:38,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-12-06 22:53:38,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-12-06 22:53:38,725 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:53:38,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:38,726 INFO L85 PathProgramCache]: Analyzing trace with hash 129970745, now seen corresponding path program 29 times [2021-12-06 22:53:38,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:38,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192290297] [2021-12-06 22:53:38,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:38,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:38,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 435 proven. 993 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-06 22:53:39,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:39,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192290297] [2021-12-06 22:53:39,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192290297] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:53:39,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775470960] [2021-12-06 22:53:39,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 22:53:39,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:53:39,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:53:39,406 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:53:39,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-06 22:53:45,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-12-06 22:53:45,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:53:45,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 191 conjunts are in the unsatisfiable core [2021-12-06 22:53:45,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:53:45,092 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:53:45,092 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 [2021-12-06 22:53:47,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 496 proven. 932 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-06 22:53:47,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:53:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1989 backedges. 561 proven. 867 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-06 22:53:49,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775470960] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:53:49,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:53:49,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 39] total 118 [2021-12-06 22:53:49,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333807056] [2021-12-06 22:53:49,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:53:49,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-06 22:53:49,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:53:49,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-06 22:53:49,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1599, Invalid=12443, Unknown=0, NotChecked=0, Total=14042 [2021-12-06 22:53:49,848 INFO L87 Difference]: Start difference. First operand 253 states and 255 transitions. Second operand has 119 states, 118 states have (on average 4.711864406779661) internal successors, (556), 119 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:52,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:53:52,057 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2021-12-06 22:53:52,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-12-06 22:53:52,058 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 4.711864406779661) internal successors, (556), 119 states have internal predecessors, (556), 0 states have call successors, (0), 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 252 [2021-12-06 22:53:52,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:53:52,059 INFO L225 Difference]: With dead ends: 260 [2021-12-06 22:53:52,059 INFO L226 Difference]: Without dead ends: 260 [2021-12-06 22:53:52,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6302 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4299, Invalid=20507, Unknown=0, NotChecked=0, Total=24806 [2021-12-06 22:53:52,060 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 708 mSDsluCounter, 1487 mSDsCounter, 0 mSdLazyCounter, 3564 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 1547 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 3564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 22:53:52,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 1547 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 3564 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-06 22:53:52,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-06 22:53:52,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-12-06 22:53:52,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.0116279069767442) internal successors, (261), 258 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) [2021-12-06 22:53:52,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2021-12-06 22:53:52,062 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 252 [2021-12-06 22:53:52,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:53:52,062 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2021-12-06 22:53:52,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 4.711864406779661) internal successors, (556), 119 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:53:52,063 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2021-12-06 22:53:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-12-06 22:53:52,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 22:53:52,063 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:53:52,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-06 22:53:52,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:53:52,265 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 15 more)] === [2021-12-06 22:53:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 22:53:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash -766328696, now seen corresponding path program 30 times [2021-12-06 22:53:52,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 22:53:52,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398760860] [2021-12-06 22:53:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 22:53:52,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 22:53:52,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 22:53:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2094 backedges. 886 proven. 647 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-12-06 22:53:52,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 22:53:52,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398760860] [2021-12-06 22:53:52,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398760860] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 22:53:52,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771274618] [2021-12-06 22:53:52,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 22:53:52,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:53:52,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 22:53:52,916 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 22:53:52,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-12-06 22:54:39,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-12-06 22:54:39,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 22:54:39,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 127 conjunts are in the unsatisfiable core [2021-12-06 22:54:39,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 22:54:39,672 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 22:54:39,673 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 [2021-12-06 22:54:40,046 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 [2021-12-06 22:54:40,364 INFO L354 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2021-12-06 22:54:40,365 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 32 treesize of output 36 [2021-12-06 22:54:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2094 backedges. 133 proven. 71 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2021-12-06 22:54:40,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 22:54:51,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 22:54:51,661 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 103 treesize of output 103 [2021-12-06 22:54:51,675 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 40 treesize of output 36 [2021-12-06 22:54:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2094 backedges. 0 proven. 347 refuted. 0 times theorem prover too weak. 1747 trivial. 0 not checked. [2021-12-06 22:54:52,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771274618] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 22:54:52,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 22:54:52,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 13, 16] total 69 [2021-12-06 22:54:52,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258412760] [2021-12-06 22:54:52,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 22:54:52,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-06 22:54:52,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 22:54:52,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-06 22:54:52,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=4183, Unknown=5, NotChecked=0, Total=4692 [2021-12-06 22:54:52,153 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand has 69 states, 69 states have (on average 3.927536231884058) internal successors, (271), 69 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:59,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 22:54:59,679 INFO L93 Difference]: Finished difference Result 447 states and 450 transitions. [2021-12-06 22:54:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-12-06 22:54:59,679 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.927536231884058) internal successors, (271), 69 states have internal predecessors, (271), 0 states have call successors, (0), 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 258 [2021-12-06 22:54:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 22:54:59,679 INFO L225 Difference]: With dead ends: 447 [2021-12-06 22:54:59,679 INFO L226 Difference]: Without dead ends: 0 [2021-12-06 22:54:59,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11697 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=6275, Invalid=38030, Unknown=5, NotChecked=0, Total=44310 [2021-12-06 22:54:59,681 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 265 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 22:54:59,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 183 Invalid, 2242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1898 Invalid, 0 Unknown, 250 Unchecked, 0.8s Time] [2021-12-06 22:54:59,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-06 22:54:59,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-06 22:54:59,682 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) [2021-12-06 22:54:59,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-06 22:54:59,682 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 258 [2021-12-06 22:54:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 22:54:59,682 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-06 22:54:59,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.927536231884058) internal successors, (271), 69 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 22:54:59,682 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-06 22:54:59,682 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-06 22:54:59,684 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (18 of 19 remaining) [2021-12-06 22:54:59,684 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (17 of 19 remaining) [2021-12-06 22:54:59,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (16 of 19 remaining) [2021-12-06 22:54:59,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (15 of 19 remaining) [2021-12-06 22:54:59,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (14 of 19 remaining) [2021-12-06 22:54:59,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (13 of 19 remaining) [2021-12-06 22:54:59,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (12 of 19 remaining) [2021-12-06 22:54:59,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (11 of 19 remaining) [2021-12-06 22:54:59,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATION (10 of 19 remaining) [2021-12-06 22:54:59,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATION (9 of 19 remaining) [2021-12-06 22:54:59,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATION (8 of 19 remaining) [2021-12-06 22:54:59,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATION (7 of 19 remaining) [2021-12-06 22:54:59,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATION (6 of 19 remaining) [2021-12-06 22:54:59,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATION (5 of 19 remaining) [2021-12-06 22:54:59,685 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATION (4 of 19 remaining) [2021-12-06 22:54:59,686 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATION (3 of 19 remaining) [2021-12-06 22:54:59,686 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATION (2 of 19 remaining) [2021-12-06 22:54:59,686 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATION (1 of 19 remaining) [2021-12-06 22:54:59,686 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2021-12-06 22:54:59,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-12-06 22:54:59,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 22:54:59,897 INFO L732 BasicCegarLoop]: Path program histogram: [30, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 22:54:59,902 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 22:54:59,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 10:54:59 BoogieIcfgContainer [2021-12-06 22:54:59,908 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 22:54:59,910 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 22:54:59,910 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 22:54:59,910 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 22:54:59,911 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 10:45:57" (3/4) ... [2021-12-06 22:54:59,918 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-06 22:54:59,933 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-12-06 22:54:59,933 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-12-06 22:54:59,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-12-06 22:54:59,934 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-06 22:54:59,960 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 22:54:59,960 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 22:54:59,961 INFO L158 Benchmark]: Toolchain (without parser) took 542920.40ms. Allocated memory was 77.6MB in the beginning and 281.0MB in the end (delta: 203.4MB). Free memory was 41.0MB in the beginning and 86.8MB in the end (delta: -45.8MB). Peak memory consumption was 155.8MB. Max. memory is 16.1GB. [2021-12-06 22:54:59,961 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 77.6MB. Free memory is still 58.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 22:54:59,961 INFO L158 Benchmark]: CACSL2BoogieTranslator took 267.78ms. Allocated memory was 77.6MB in the beginning and 109.1MB in the end (delta: 31.5MB). Free memory was 40.8MB in the beginning and 80.3MB in the end (delta: -39.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-06 22:54:59,961 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.05ms. Allocated memory is still 109.1MB. Free memory was 80.3MB in the beginning and 78.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 22:54:59,961 INFO L158 Benchmark]: Boogie Preprocessor took 19.92ms. Allocated memory is still 109.1MB. Free memory was 78.2MB in the beginning and 77.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 22:54:59,961 INFO L158 Benchmark]: RCFGBuilder took 302.69ms. Allocated memory is still 109.1MB. Free memory was 76.5MB in the beginning and 63.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-06 22:54:59,961 INFO L158 Benchmark]: TraceAbstraction took 542241.00ms. Allocated memory was 109.1MB in the beginning and 281.0MB in the end (delta: 172.0MB). Free memory was 63.0MB in the beginning and 89.8MB in the end (delta: -26.8MB). Peak memory consumption was 147.6MB. Max. memory is 16.1GB. [2021-12-06 22:54:59,961 INFO L158 Benchmark]: Witness Printer took 50.52ms. Allocated memory is still 281.0MB. Free memory was 89.8MB in the beginning and 86.8MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 22:54:59,962 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 77.6MB. Free memory is still 58.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 267.78ms. Allocated memory was 77.6MB in the beginning and 109.1MB in the end (delta: 31.5MB). Free memory was 40.8MB in the beginning and 80.3MB in the end (delta: -39.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.05ms. Allocated memory is still 109.1MB. Free memory was 80.3MB in the beginning and 78.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.92ms. Allocated memory is still 109.1MB. Free memory was 78.2MB in the beginning and 77.0MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 302.69ms. Allocated memory is still 109.1MB. Free memory was 76.5MB in the beginning and 63.5MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 542241.00ms. Allocated memory was 109.1MB in the beginning and 281.0MB in the end (delta: 172.0MB). Free memory was 63.0MB in the beginning and 89.8MB in the end (delta: -26.8MB). Peak memory consumption was 147.6MB. Max. memory is 16.1GB. * Witness Printer took 50.52ms. Allocated memory is still 281.0MB. Free memory was 89.8MB in the beginning and 86.8MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. 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: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 535]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 542]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 542]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 517]: 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: 521]: 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, 50 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 542.2s, OverallIterations: 84, TraceHistogramMax: 19, PathProgramHistogramMax: 30, EmptinessCheckTime: 0.1s, AutomataDifference: 132.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 24828 SdHoareTripleChecker+Valid, 46.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 24828 mSDsluCounter, 75872 SdHoareTripleChecker+Invalid, 38.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 14706 IncrementalHoareTripleChecker+Unchecked, 72943 mSDsCounter, 5377 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 153258 IncrementalHoareTripleChecker+Invalid, 173341 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5377 mSolverCounterUnsat, 2929 mSDtfsCounter, 153258 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19992 GetRequests, 13907 SyntacticMatches, 132 SemanticMatches, 5953 ConstructedPredicates, 8 IntricatePredicates, 30 DeprecatedPredicates, 161722 ImplicationChecksByTransitivity, 248.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=259occurred in iteration=83, InterpolantAutomatonStates: 2785, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 84 MinimizatonAttempts, 739 StatesRemovedByMinimization, 69 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.1s SsaConstructionTime, 151.6s SatisfiabilityAnalysisTime, 238.6s InterpolantComputationTime, 16526 NumberOfCodeBlocks, 16333 NumberOfCodeBlocksAsserted, 436 NumberOfCheckSat, 24389 ConstructedInterpolants, 1593 QuantifiedInterpolants, 324460 SizeOfPredicates, 2174 NumberOfNonLiveVariables, 39422 ConjunctsInSsa, 7421 ConjunctsInUnsatCore, 209 InterpolantComputations, 22 PerfectInterpolantSequences, 51918/121754 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! [2021-12-06 22:55:00,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7746b98-e8a3-43f5-9703-0fb8cca0e1fa/bin/uautomizer-DrprNOufMa/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