./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/condn.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/condn.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 14:11:56,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 14:11:56,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 14:11:56,480 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 14:11:56,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 14:11:56,487 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 14:11:56,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 14:11:56,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 14:11:56,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 14:11:56,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 14:11:56,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 14:11:56,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 14:11:56,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 14:11:56,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 14:11:56,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 14:11:56,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 14:11:56,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 14:11:56,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 14:11:56,524 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 14:11:56,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 14:11:56,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 14:11:56,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 14:11:56,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 14:11:56,545 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 14:11:56,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 14:11:56,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 14:11:56,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 14:11:56,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 14:11:56,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 14:11:56,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 14:11:56,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 14:11:56,561 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 14:11:56,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 14:11:56,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 14:11:56,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 14:11:56,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 14:11:56,568 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 14:11:56,568 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 14:11:56,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 14:11:56,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 14:11:56,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 14:11:56,570 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 14:11:56,620 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 14:11:56,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 14:11:56,621 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 14:11:56,621 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 14:11:56,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 14:11:56,630 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 14:11:56,630 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 14:11:56,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 14:11:56,630 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 14:11:56,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 14:11:56,631 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 14:11:56,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 14:11:56,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 14:11:56,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 14:11:56,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 14:11:56,632 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 14:11:56,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 14:11:56,632 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 14:11:56,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 14:11:56,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 14:11:56,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 14:11:56,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 14:11:56,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:11:56,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 14:11:56,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 14:11:56,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 14:11:56,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 14:11:56,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 14:11:56,635 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 14:11:56,635 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 14:11:56,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 14:11:56,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 14:11:56,635 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_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 [2021-11-23 14:11:57,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 14:11:57,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 14:11:57,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 14:11:57,082 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 14:11:57,083 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 14:11:57,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-fpi/condn.c [2021-11-23 14:11:57,183 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/data/9e0eb66e5/f81d751743054a45b4fcab8274ef5c66/FLAG89236bcf8 [2021-11-23 14:11:57,818 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 14:11:57,818 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/sv-benchmarks/c/array-fpi/condn.c [2021-11-23 14:11:57,833 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/data/9e0eb66e5/f81d751743054a45b4fcab8274ef5c66/FLAG89236bcf8 [2021-11-23 14:11:58,154 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/data/9e0eb66e5/f81d751743054a45b4fcab8274ef5c66 [2021-11-23 14:11:58,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 14:11:58,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 14:11:58,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 14:11:58,167 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 14:11:58,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 14:11:58,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:58" (1/1) ... [2021-11-23 14:11:58,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4089b04b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:58, skipping insertion in model container [2021-11-23 14:11:58,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:58" (1/1) ... [2021-11-23 14:11:58,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 14:11:58,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 14:11:58,451 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/sv-benchmarks/c/array-fpi/condn.c[588,601] [2021-11-23 14:11:58,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:11:58,481 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 14:11:58,497 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/sv-benchmarks/c/array-fpi/condn.c[588,601] [2021-11-23 14:11:58,505 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 14:11:58,522 INFO L208 MainTranslator]: Completed translation [2021-11-23 14:11:58,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:58 WrapperNode [2021-11-23 14:11:58,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 14:11:58,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 14:11:58,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 14:11:58,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 14:11:58,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:58" (1/1) ... [2021-11-23 14:11:58,546 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:58" (1/1) ... [2021-11-23 14:11:58,579 INFO L137 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2021-11-23 14:11:58,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 14:11:58,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 14:11:58,582 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 14:11:58,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 14:11:58,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:58" (1/1) ... [2021-11-23 14:11:58,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:58" (1/1) ... [2021-11-23 14:11:58,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:58" (1/1) ... [2021-11-23 14:11:58,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:58" (1/1) ... [2021-11-23 14:11:58,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:58" (1/1) ... [2021-11-23 14:11:58,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:58" (1/1) ... [2021-11-23 14:11:58,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:58" (1/1) ... [2021-11-23 14:11:58,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 14:11:58,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 14:11:58,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 14:11:58,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 14:11:58,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:58" (1/1) ... [2021-11-23 14:11:58,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 14:11:58,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:11:58,662 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 14:11:58,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 14:11:58,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 14:11:58,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 14:11:58,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 14:11:58,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 14:11:58,728 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 14:11:58,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 14:11:58,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 14:11:58,809 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 14:11:58,811 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 14:11:59,044 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 14:11:59,051 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 14:11:59,051 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 14:11:59,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:59 BoogieIcfgContainer [2021-11-23 14:11:59,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 14:11:59,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 14:11:59,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 14:11:59,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 14:11:59,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:11:58" (1/3) ... [2021-11-23 14:11:59,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2936354d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:59, skipping insertion in model container [2021-11-23 14:11:59,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:58" (2/3) ... [2021-11-23 14:11:59,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2936354d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:59, skipping insertion in model container [2021-11-23 14:11:59,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:59" (3/3) ... [2021-11-23 14:11:59,073 INFO L111 eAbstractionObserver]: Analyzing ICFG condn.c [2021-11-23 14:11:59,079 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 14:11:59,079 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 14:11:59,145 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 14:11:59,155 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 14:11:59,156 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 14:11:59,177 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 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) [2021-11-23 14:11:59,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 14:11:59,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:59,197 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:11:59,199 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:59,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:59,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1828392228, now seen corresponding path program 1 times [2021-11-23 14:11:59,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:59,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996496240] [2021-11-23 14:11:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:59,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:59,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:59,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:59,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996496240] [2021-11-23 14:11:59,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996496240] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:59,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:59,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 14:11:59,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388325063] [2021-11-23 14:11:59,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:59,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 14:11:59,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:59,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 14:11:59,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 14:11:59,478 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:59,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:59,498 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-11-23 14:11:59,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 14:11:59,501 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 14:11:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:59,510 INFO L225 Difference]: With dead ends: 40 [2021-11-23 14:11:59,511 INFO L226 Difference]: Without dead ends: 18 [2021-11-23 14:11:59,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 14:11:59,520 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:59,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 14:11:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-23 14:11:59,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-23 14:11:59,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-23 14:11:59,559 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2021-11-23 14:11:59,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:59,560 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-23 14:11:59,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:59,561 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-23 14:11:59,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 14:11:59,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:59,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:11:59,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 14:11:59,564 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:59,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:59,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1148333858, now seen corresponding path program 1 times [2021-11-23 14:11:59,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:59,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302958760] [2021-11-23 14:11:59,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:59,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:11:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:11:59,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:11:59,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302958760] [2021-11-23 14:11:59,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302958760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 14:11:59,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 14:11:59,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 14:11:59,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472472031] [2021-11-23 14:11:59,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 14:11:59,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 14:11:59,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:11:59,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 14:11:59,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:11:59,713 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:59,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:11:59,798 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2021-11-23 14:11:59,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 14:11:59,799 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 14:11:59,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:11:59,802 INFO L225 Difference]: With dead ends: 40 [2021-11-23 14:11:59,803 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 14:11:59,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 14:11:59,810 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:11:59,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 15 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:11:59,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 14:11:59,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-11-23 14:11:59,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-23 14:11:59,829 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-11-23 14:11:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:11:59,831 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-23 14:11:59,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:11:59,833 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-23 14:11:59,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 14:11:59,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:11:59,837 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:11:59,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 14:11:59,839 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:11:59,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:11:59,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2142875084, now seen corresponding path program 1 times [2021-11-23 14:11:59,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:11:59,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590409229] [2021-11-23 14:11:59,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:11:59,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:11:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:12:00,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:00,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590409229] [2021-11-23 14:12:00,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590409229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:12:00,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148889945] [2021-11-23 14:12:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:00,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:00,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:12:00,237 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:12:00,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 14:12:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:00,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 14:12:00,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:12:00,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 14:12:00,561 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 0 case distinctions, treesize of input 44 treesize of output 18 [2021-11-23 14:12:00,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-23 14:12:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:12:00,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:12:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:12:00,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148889945] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:12:00,873 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:12:00,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2021-11-23 14:12:00,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579746239] [2021-11-23 14:12:00,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:12:00,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 14:12:00,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:00,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 14:12:00,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-23 14:12:00,882 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:12:01,312 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2021-11-23 14:12:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 14:12:01,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 14:12:01,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:12:01,315 INFO L225 Difference]: With dead ends: 47 [2021-11-23 14:12:01,316 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 14:12:01,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2021-11-23 14:12:01,321 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:12:01,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 67 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:12:01,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 14:12:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 22. [2021-11-23 14:12:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-23 14:12:01,338 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2021-11-23 14:12:01,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:12:01,338 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-23 14:12:01,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:01,339 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-23 14:12:01,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 14:12:01,340 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:12:01,341 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:12:01,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 14:12:01,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:01,567 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:12:01,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:12:01,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2090341226, now seen corresponding path program 1 times [2021-11-23 14:12:01,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:12:01,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760779111] [2021-11-23 14:12:01,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:01,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:12:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:12:01,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:01,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760779111] [2021-11-23 14:12:01,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760779111] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:12:01,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525399476] [2021-11-23 14:12:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:01,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:01,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:12:01,727 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:12:01,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 14:12:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:01,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 14:12:01,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:12:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:12:01,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:12:01,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:12:01,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525399476] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:12:01,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:12:01,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-23 14:12:01,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028440620] [2021-11-23 14:12:01,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:12:01,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 14:12:01,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:01,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 14:12:01,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 14:12:01,948 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:02,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:12:02,110 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2021-11-23 14:12:02,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 14:12:02,111 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 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 21 [2021-11-23 14:12:02,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:12:02,113 INFO L225 Difference]: With dead ends: 62 [2021-11-23 14:12:02,114 INFO L226 Difference]: Without dead ends: 38 [2021-11-23 14:12:02,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-23 14:12:02,120 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:12:02,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 47 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:12:02,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-23 14:12:02,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2021-11-23 14:12:02,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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) [2021-11-23 14:12:02,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-23 14:12:02,138 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2021-11-23 14:12:02,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:12:02,138 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-23 14:12:02,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:02,140 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-23 14:12:02,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 14:12:02,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:12:02,141 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] [2021-11-23 14:12:02,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 14:12:02,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:02,363 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:12:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:12:02,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1394926352, now seen corresponding path program 2 times [2021-11-23 14:12:02,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:12:02,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309791052] [2021-11-23 14:12:02,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:02,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:12:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:12:02,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:02,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309791052] [2021-11-23 14:12:02,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309791052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:12:02,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122759893] [2021-11-23 14:12:02,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:12:02,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:02,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:12:02,847 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:12:02,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 14:12:02,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:12:02,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:12:02,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 14:12:02,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:12:02,971 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:03,047 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:12:03,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:12:03,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:12:03,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:12:03,432 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 82 treesize of output 70 [2021-11-23 14:12:03,469 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:12:03,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 189 treesize of output 165 [2021-11-23 14:12:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 14:12:03,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122759893] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:12:03,523 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:12:03,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 10] total 24 [2021-11-23 14:12:03,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539029810] [2021-11-23 14:12:03,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:12:03,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 14:12:03,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:03,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 14:12:03,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-11-23 14:12:03,526 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-11-23 14:12:04,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:12:04,487 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-11-23 14:12:04,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 14:12:04,488 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) Word has length 26 [2021-11-23 14:12:04,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:12:04,489 INFO L225 Difference]: With dead ends: 61 [2021-11-23 14:12:04,489 INFO L226 Difference]: Without dead ends: 59 [2021-11-23 14:12:04,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 14:12:04,492 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 14:12:04,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 94 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 14:12:04,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-23 14:12:04,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2021-11-23 14:12:04,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-11-23 14:12:04,499 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 26 [2021-11-23 14:12:04,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:12:04,500 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-11-23 14:12:04,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 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) [2021-11-23 14:12:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-11-23 14:12:04,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 14:12:04,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:12:04,501 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:12:04,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 14:12:04,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:04,727 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:12:04,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:12:04,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1446324666, now seen corresponding path program 3 times [2021-11-23 14:12:04,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:12:04,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674218025] [2021-11-23 14:12:04,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:04,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:12:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:12:04,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:04,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674218025] [2021-11-23 14:12:04,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674218025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:12:04,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74200181] [2021-11-23 14:12:04,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:12:04,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:04,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:12:04,847 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:12:04,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 14:12:04,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 14:12:04,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:12:04,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 14:12:04,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:12:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:12:05,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:12:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 14:12:05,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74200181] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:12:05,155 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:12:05,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-23 14:12:05,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26390452] [2021-11-23 14:12:05,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:12:05,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 14:12:05,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:05,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 14:12:05,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-23 14:12:05,158 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:12:05,390 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2021-11-23 14:12:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 14:12:05,390 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 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 [2021-11-23 14:12:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:12:05,397 INFO L225 Difference]: With dead ends: 82 [2021-11-23 14:12:05,397 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 14:12:05,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-23 14:12:05,400 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:12:05,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 74 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:12:05,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 14:12:05,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-11-23 14:12:05,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 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) [2021-11-23 14:12:05,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-11-23 14:12:05,423 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2021-11-23 14:12:05,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:12:05,423 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-11-23 14:12:05,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:05,424 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-11-23 14:12:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 14:12:05,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:12:05,425 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:12:05,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 14:12:05,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:05,643 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:12:05,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:12:05,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1754360412, now seen corresponding path program 4 times [2021-11-23 14:12:05,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:12:05,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655828584] [2021-11-23 14:12:05,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:05,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:12:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:12:05,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:05,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655828584] [2021-11-23 14:12:05,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655828584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:12:05,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813474813] [2021-11-23 14:12:05,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:12:05,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:05,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:12:05,962 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:12:05,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 14:12:06,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:12:06,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:12:06,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 14:12:06,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:12:06,090 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:06,144 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 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-23 14:12:06,307 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 25 [2021-11-23 14:12:06,340 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:12:06,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:12:06,594 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 82 treesize of output 70 [2021-11-23 14:12:06,620 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:12:06,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 189 treesize of output 165 [2021-11-23 14:12:06,693 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:12:06,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813474813] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:12:06,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:12:06,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 28 [2021-11-23 14:12:06,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581437890] [2021-11-23 14:12:06,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:12:06,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 14:12:06,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:06,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 14:12:06,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-11-23 14:12:06,697 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:07,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:12:07,568 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2021-11-23 14:12:07,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 14:12:07,569 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 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) Word has length 35 [2021-11-23 14:12:07,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:12:07,570 INFO L225 Difference]: With dead ends: 75 [2021-11-23 14:12:07,570 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 14:12:07,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=341, Invalid=1821, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 14:12:07,572 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 119 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 14:12:07,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 130 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 14:12:07,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 14:12:07,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2021-11-23 14:12:07,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:07,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-11-23 14:12:07,582 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 35 [2021-11-23 14:12:07,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:12:07,582 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-11-23 14:12:07,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 28 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-11-23 14:12:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 14:12:07,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:12:07,584 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:12:07,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 14:12:07,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:07,807 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:12:07,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:12:07,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1980833498, now seen corresponding path program 5 times [2021-11-23 14:12:07,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:12:07,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210774802] [2021-11-23 14:12:07,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:07,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:12:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 14:12:07,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:07,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210774802] [2021-11-23 14:12:07,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210774802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:12:07,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049700865] [2021-11-23 14:12:07,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 14:12:07,966 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:07,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:12:07,968 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:12:07,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 14:12:08,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-23 14:12:08,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:12:08,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 14:12:08,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:12:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:12:08,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:12:08,403 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 14:12:08,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049700865] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:12:08,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:12:08,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-23 14:12:08,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375596671] [2021-11-23 14:12:08,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:12:08,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 14:12:08,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:08,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 14:12:08,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-23 14:12:08,406 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:08,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:12:08,600 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2021-11-23 14:12:08,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 14:12:08,601 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 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) Word has length 39 [2021-11-23 14:12:08,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:12:08,602 INFO L225 Difference]: With dead ends: 102 [2021-11-23 14:12:08,602 INFO L226 Difference]: Without dead ends: 56 [2021-11-23 14:12:08,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-11-23 14:12:08,604 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 100 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:12:08,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 68 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 14:12:08,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-23 14:12:08,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2021-11-23 14:12:08,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.1590909090909092) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2021-11-23 14:12:08,611 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 39 [2021-11-23 14:12:08,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:12:08,612 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2021-11-23 14:12:08,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:08,612 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2021-11-23 14:12:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-23 14:12:08,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:12:08,614 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:12:08,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 14:12:08,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:08,815 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:12:08,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:12:08,815 INFO L85 PathProgramCache]: Analyzing trace with hash -249765768, now seen corresponding path program 6 times [2021-11-23 14:12:08,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:12:08,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919181707] [2021-11-23 14:12:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:08,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:12:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 14:12:09,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:09,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919181707] [2021-11-23 14:12:09,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919181707] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:12:09,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081439383] [2021-11-23 14:12:09,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 14:12:09,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:09,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:12:09,261 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:12:09,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 14:12:09,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-23 14:12:09,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:12:09,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 14:12:09,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:12:09,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 14:12:09,445 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:09,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:09,513 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:09,563 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 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-23 14:12:10,198 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-23 14:12:10,199 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 50 treesize of output 39 [2021-11-23 14:12:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:12:10,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:12:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 14:12:12,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081439383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:12:12,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:12:12,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 15] total 43 [2021-11-23 14:12:12,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332819542] [2021-11-23 14:12:12,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:12:12,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-23 14:12:12,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:12,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-23 14:12:12,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 14:12:12,790 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:14,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:12:14,644 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2021-11-23 14:12:14,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-23 14:12:14,645 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 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 44 [2021-11-23 14:12:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:12:14,648 INFO L225 Difference]: With dead ends: 107 [2021-11-23 14:12:14,648 INFO L226 Difference]: Without dead ends: 105 [2021-11-23 14:12:14,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=921, Invalid=5399, Unknown=0, NotChecked=0, Total=6320 [2021-11-23 14:12:14,656 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 72 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 14:12:14,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 271 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 478 Invalid, 0 Unknown, 137 Unchecked, 0.4s Time] [2021-11-23 14:12:14,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-23 14:12:14,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-11-23 14:12:14,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-11-23 14:12:14,688 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 44 [2021-11-23 14:12:14,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:12:14,691 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-11-23 14:12:14,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.488372093023256) internal successors, (107), 43 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:14,692 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-11-23 14:12:14,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 14:12:14,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:12:14,696 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:12:14,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 14:12:14,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:14,923 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:12:14,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:12:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1288199652, now seen corresponding path program 7 times [2021-11-23 14:12:14,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:12:14,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213985971] [2021-11-23 14:12:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:14,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:12:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:15,095 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 14:12:15,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:15,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213985971] [2021-11-23 14:12:15,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213985971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:12:15,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208066235] [2021-11-23 14:12:15,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 14:12:15,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:15,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:12:15,097 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:12:15,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 14:12:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:15,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 14:12:15,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:12:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 14:12:15,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:12:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 14:12:15,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208066235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:12:15,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:12:15,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-11-23 14:12:15,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531664584] [2021-11-23 14:12:15,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:12:15,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 14:12:15,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:15,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 14:12:15,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-23 14:12:15,558 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:12:15,825 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2021-11-23 14:12:15,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 14:12:15,826 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-23 14:12:15,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:12:15,827 INFO L225 Difference]: With dead ends: 143 [2021-11-23 14:12:15,827 INFO L226 Difference]: Without dead ends: 69 [2021-11-23 14:12:15,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-11-23 14:12:15,829 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 152 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:12:15,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 86 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:12:15,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-11-23 14:12:15,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2021-11-23 14:12:15,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.163265306122449) 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) [2021-11-23 14:12:15,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-11-23 14:12:15,838 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 47 [2021-11-23 14:12:15,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:12:15,839 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-11-23 14:12:15,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:15,839 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-11-23 14:12:15,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 14:12:15,840 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:12:15,840 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:12:15,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 14:12:16,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 14:12:16,055 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:12:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:12:16,056 INFO L85 PathProgramCache]: Analyzing trace with hash 534659294, now seen corresponding path program 8 times [2021-11-23 14:12:16,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:12:16,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664808609] [2021-11-23 14:12:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:16,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:12:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:16,870 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:12:16,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:16,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664808609] [2021-11-23 14:12:16,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664808609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:12:16,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197063760] [2021-11-23 14:12:16,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:12:16,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:16,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:12:16,873 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:12:16,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 14:12:16,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:12:16,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:12:16,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 14:12:16,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:12:17,052 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:17,067 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:17,084 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:17,155 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 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-23 14:12:17,213 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 14:12:17,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 24 [2021-11-23 14:12:17,461 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 25 [2021-11-23 14:12:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 14:12:17,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:12:18,083 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 82 treesize of output 70 [2021-11-23 14:12:18,102 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:12:18,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 290 treesize of output 242 [2021-11-23 14:12:18,180 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 14:12:18,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197063760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:12:18,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:12:18,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 13, 14] total 43 [2021-11-23 14:12:18,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720891764] [2021-11-23 14:12:18,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:12:18,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-23 14:12:18,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:18,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-23 14:12:18,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 14:12:18,185 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:20,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:12:20,394 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2021-11-23 14:12:20,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-23 14:12:20,395 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 states have internal predecessors, (119), 0 states have call successors, (0), 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 49 [2021-11-23 14:12:20,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:12:20,396 INFO L225 Difference]: With dead ends: 93 [2021-11-23 14:12:20,396 INFO L226 Difference]: Without dead ends: 91 [2021-11-23 14:12:20,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=811, Invalid=6161, Unknown=0, NotChecked=0, Total=6972 [2021-11-23 14:12:20,400 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 235 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:12:20,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 210 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 895 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 14:12:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-23 14:12:20,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 54. [2021-11-23 14:12:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:20,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-11-23 14:12:20,415 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 49 [2021-11-23 14:12:20,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:12:20,416 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-11-23 14:12:20,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.7674418604651163) internal successors, (119), 43 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-11-23 14:12:20,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 14:12:20,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:12:20,417 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:12:20,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 14:12:20,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:20,641 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:12:20,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:12:20,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1679516396, now seen corresponding path program 9 times [2021-11-23 14:12:20,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:12:20,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92312115] [2021-11-23 14:12:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:20,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:12:20,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:12:21,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:21,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92312115] [2021-11-23 14:12:21,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92312115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:12:21,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258868859] [2021-11-23 14:12:21,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:12:21,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:21,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:12:21,254 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:12:21,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 14:12:21,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 14:12:21,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:12:21,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 14:12:21,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:12:21,396 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 15 treesize of output 11 [2021-11-23 14:12:21,475 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:21,500 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:21,525 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:21,557 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:21,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-23 14:12:22,454 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-23 14:12:22,455 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 53 treesize of output 42 [2021-11-23 14:12:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 9 proven. 67 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 14:12:22,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:12:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 14:12:23,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258868859] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:12:23,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:12:23,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 17] total 50 [2021-11-23 14:12:23,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633894383] [2021-11-23 14:12:23,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:12:23,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 14:12:23,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:23,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 14:12:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2065, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 14:12:23,848 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 50 states, 50 states have (on average 2.62) internal successors, (131), 50 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:29,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:12:29,079 INFO L93 Difference]: Finished difference Result 166 states and 207 transitions. [2021-11-23 14:12:29,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-23 14:12:29,080 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.62) internal successors, (131), 50 states have internal predecessors, (131), 0 states have call successors, (0), 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 53 [2021-11-23 14:12:29,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:12:29,081 INFO L225 Difference]: With dead ends: 166 [2021-11-23 14:12:29,081 INFO L226 Difference]: Without dead ends: 164 [2021-11-23 14:12:29,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5490 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2288, Invalid=13212, Unknown=0, NotChecked=0, Total=15500 [2021-11-23 14:12:29,087 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 147 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:12:29,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 344 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 893 Invalid, 0 Unknown, 30 Unchecked, 0.7s Time] [2021-11-23 14:12:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-23 14:12:29,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 104. [2021-11-23 14:12:29,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.2427184466019416) internal successors, (128), 103 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2021-11-23 14:12:29,107 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 53 [2021-11-23 14:12:29,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:12:29,107 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2021-11-23 14:12:29,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.62) internal successors, (131), 50 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:29,108 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2021-11-23 14:12:29,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 14:12:29,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:12:29,110 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:12:29,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 14:12:29,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 14:12:29,323 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:12:29,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:12:29,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2078481746, now seen corresponding path program 1 times [2021-11-23 14:12:29,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:12:29,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543748638] [2021-11-23 14:12:29,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:29,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:12:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 14:12:29,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:29,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543748638] [2021-11-23 14:12:29,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543748638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:12:29,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782269452] [2021-11-23 14:12:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:29,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:29,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:12:29,508 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:12:29,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 14:12:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:29,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 14:12:29,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:12:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 14:12:29,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:12:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 51 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 14:12:30,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782269452] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:12:30,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:12:30,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2021-11-23 14:12:30,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069680754] [2021-11-23 14:12:30,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:12:30,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 14:12:30,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:30,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 14:12:30,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-11-23 14:12:30,014 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:12:30,344 INFO L93 Difference]: Finished difference Result 235 states and 283 transitions. [2021-11-23 14:12:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 14:12:30,345 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 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) Word has length 56 [2021-11-23 14:12:30,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:12:30,347 INFO L225 Difference]: With dead ends: 235 [2021-11-23 14:12:30,347 INFO L226 Difference]: Without dead ends: 118 [2021-11-23 14:12:30,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2021-11-23 14:12:30,355 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 185 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:12:30,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 106 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:12:30,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-23 14:12:30,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2021-11-23 14:12:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2674418604651163) internal successors, (109), 86 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 109 transitions. [2021-11-23 14:12:30,376 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 109 transitions. Word has length 56 [2021-11-23 14:12:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:12:30,383 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 109 transitions. [2021-11-23 14:12:30,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 109 transitions. [2021-11-23 14:12:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 14:12:30,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:12:30,388 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:12:30,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 14:12:30,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 14:12:30,599 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:12:30,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:12:30,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1706016300, now seen corresponding path program 2 times [2021-11-23 14:12:30,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:12:30,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506784638] [2021-11-23 14:12:30,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:30,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:12:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:12:31,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:31,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506784638] [2021-11-23 14:12:31,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506784638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:12:31,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127024677] [2021-11-23 14:12:31,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:12:31,668 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:31,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:12:31,669 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:12:31,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 14:12:31,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:12:31,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:12:31,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-23 14:12:31,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:12:31,805 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:31,829 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:31,855 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:31,878 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:31,947 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 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-23 14:12:32,119 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-23 14:12:32,120 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 38 treesize of output 37 [2021-11-23 14:12:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 14:12:32,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:12:44,515 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 82 treesize of output 70 [2021-11-23 14:12:44,534 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:12:44,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 290 treesize of output 242 [2021-11-23 14:12:44,609 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 1 proven. 81 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-23 14:12:44,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127024677] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:12:44,610 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:12:44,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11, 17] total 44 [2021-11-23 14:12:44,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289083850] [2021-11-23 14:12:44,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:12:44,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 14:12:44,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:44,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 14:12:44,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1718, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 14:12:44,614 INFO L87 Difference]: Start difference. First operand 87 states and 109 transitions. Second operand has 44 states, 44 states have (on average 2.8636363636363638) internal successors, (126), 44 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) [2021-11-23 14:12:47,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:12:47,915 INFO L93 Difference]: Finished difference Result 182 states and 217 transitions. [2021-11-23 14:12:47,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-23 14:12:47,915 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.8636363636363638) internal successors, (126), 44 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) Word has length 58 [2021-11-23 14:12:47,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:12:47,917 INFO L225 Difference]: With dead ends: 182 [2021-11-23 14:12:47,917 INFO L226 Difference]: Without dead ends: 161 [2021-11-23 14:12:47,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 101 SyntacticMatches, 8 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=669, Invalid=7887, Unknown=0, NotChecked=0, Total=8556 [2021-11-23 14:12:47,921 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 145 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 1612 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:12:47,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 702 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1612 Invalid, 0 Unknown, 133 Unchecked, 1.1s Time] [2021-11-23 14:12:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-23 14:12:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 105. [2021-11-23 14:12:47,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.3173076923076923) internal successors, (137), 104 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2021-11-23 14:12:47,941 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 58 [2021-11-23 14:12:47,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:12:47,941 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2021-11-23 14:12:47,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.8636363636363638) internal successors, (126), 44 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) [2021-11-23 14:12:47,942 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2021-11-23 14:12:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 14:12:47,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:12:47,943 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:12:47,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 14:12:48,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 14:12:48,159 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:12:48,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:12:48,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1841980504, now seen corresponding path program 3 times [2021-11-23 14:12:48,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:12:48,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239623115] [2021-11-23 14:12:48,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:48,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:12:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 54 proven. 52 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 14:12:48,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:48,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239623115] [2021-11-23 14:12:48,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239623115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:12:48,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237891714] [2021-11-23 14:12:48,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:12:48,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:48,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:12:48,367 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:12:48,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 14:12:48,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-23 14:12:48,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:12:48,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 14:12:48,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:12:48,827 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 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-23 14:12:48,950 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-23 14:12:48,951 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 28 treesize of output 27 [2021-11-23 14:12:49,936 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-11-23 14:12:49,936 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 110 treesize of output 42 [2021-11-23 14:12:49,985 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 32 proven. 71 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 14:12:49,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:12:50,621 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 54 treesize of output 48 [2021-11-23 14:12:50,628 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 14:12:50,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 87 [2021-11-23 14:12:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-23 14:12:51,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237891714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:12:51,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:12:51,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 24] total 59 [2021-11-23 14:12:51,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518104570] [2021-11-23 14:12:51,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:12:51,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-23 14:12:51,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:51,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-23 14:12:51,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=2957, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 14:12:51,156 INFO L87 Difference]: Start difference. First operand 105 states and 137 transitions. Second operand has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:12:55,851 INFO L93 Difference]: Finished difference Result 313 states and 386 transitions. [2021-11-23 14:12:55,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-23 14:12:55,851 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-23 14:12:55,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:12:55,853 INFO L225 Difference]: With dead ends: 313 [2021-11-23 14:12:55,853 INFO L226 Difference]: Without dead ends: 248 [2021-11-23 14:12:55,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7658 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3141, Invalid=19209, Unknown=0, NotChecked=0, Total=22350 [2021-11-23 14:12:55,860 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 432 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 486 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 486 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:12:55,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 526 Invalid, 2352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [486 Valid, 1661 Invalid, 0 Unknown, 205 Unchecked, 1.1s Time] [2021-11-23 14:12:55,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-23 14:12:55,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 153. [2021-11-23 14:12:55,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.263157894736842) internal successors, (192), 152 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) [2021-11-23 14:12:55,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 192 transitions. [2021-11-23 14:12:55,887 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 192 transitions. Word has length 61 [2021-11-23 14:12:55,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:12:55,887 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 192 transitions. [2021-11-23 14:12:55,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.2542372881355934) internal successors, (133), 59 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:12:55,888 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 192 transitions. [2021-11-23 14:12:55,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-23 14:12:55,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:12:55,889 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:12:55,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 14:12:56,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 14:12:56,111 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:12:56,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:12:56,112 INFO L85 PathProgramCache]: Analyzing trace with hash 72917472, now seen corresponding path program 10 times [2021-11-23 14:12:56,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:12:56,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612894264] [2021-11-23 14:12:56,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:12:56,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:12:56,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:12:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:12:56,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:12:56,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612894264] [2021-11-23 14:12:56,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612894264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:12:56,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988027362] [2021-11-23 14:12:56,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:12:56,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:12:56,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:12:56,836 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:12:56,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 14:12:56,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:12:56,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:12:56,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 14:12:56,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:12:56,980 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:57,008 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:57,031 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:57,054 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:12:57,120 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:12:57,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:12:57,512 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 14:12:57,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:12:58,227 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 82 treesize of output 70 [2021-11-23 14:12:58,240 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:12:58,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 189 treesize of output 165 [2021-11-23 14:12:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 14:12:58,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988027362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:12:58,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:12:58,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 17, 18] total 47 [2021-11-23 14:12:58,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359618594] [2021-11-23 14:12:58,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:12:58,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 14:12:58,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:12:58,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 14:12:58,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1971, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 14:12:58,310 INFO L87 Difference]: Start difference. First operand 153 states and 192 transitions. Second operand has 47 states, 47 states have (on average 3.021276595744681) internal successors, (142), 47 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:01,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:13:01,095 INFO L93 Difference]: Finished difference Result 283 states and 332 transitions. [2021-11-23 14:13:01,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-23 14:13:01,095 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.021276595744681) internal successors, (142), 47 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-23 14:13:01,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:13:01,097 INFO L225 Difference]: With dead ends: 283 [2021-11-23 14:13:01,097 INFO L226 Difference]: Without dead ends: 206 [2021-11-23 14:13:01,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 96 SyntacticMatches, 8 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2424 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1054, Invalid=8452, Unknown=0, NotChecked=0, Total=9506 [2021-11-23 14:13:01,099 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 328 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 1444 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 14:13:01,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 388 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1444 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 14:13:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-23 14:13:01,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 129. [2021-11-23 14:13:01,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.265625) internal successors, (162), 128 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) [2021-11-23 14:13:01,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 162 transitions. [2021-11-23 14:13:01,117 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 162 transitions. Word has length 62 [2021-11-23 14:13:01,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:13:01,117 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 162 transitions. [2021-11-23 14:13:01,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.021276595744681) internal successors, (142), 47 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:01,118 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 162 transitions. [2021-11-23 14:13:01,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 14:13:01,119 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:13:01,119 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:13:01,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 14:13:01,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:13:01,326 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:13:01,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:13:01,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1137379226, now seen corresponding path program 4 times [2021-11-23 14:13:01,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:13:01,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480929325] [2021-11-23 14:13:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:13:01,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:13:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:13:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 1 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:13:01,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:13:01,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480929325] [2021-11-23 14:13:01,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480929325] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:13:01,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988751760] [2021-11-23 14:13:01,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:13:01,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:13:01,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:13:01,999 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:13:02,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 14:13:02,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:13:02,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:13:02,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 14:13:02,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:13:02,140 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:02,167 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:02,191 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:02,256 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 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-23 14:13:02,344 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 0 case distinctions, treesize of input 50 treesize of output 41 [2021-11-23 14:13:02,358 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 14:13:02,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 53 [2021-11-23 14:13:02,460 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 0 case distinctions, treesize of input 50 treesize of output 43 [2021-11-23 14:13:02,486 INFO L354 Elim1Store]: treesize reduction 80, result has 20.8 percent of original size [2021-11-23 14:13:02,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 72 [2021-11-23 14:13:03,128 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 14:13:03,128 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 66 treesize of output 30 [2021-11-23 14:13:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-23 14:13:03,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:13:10,615 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 82 treesize of output 70 [2021-11-23 14:13:10,629 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:13:10,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 189 treesize of output 165 [2021-11-23 14:13:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-23 14:13:10,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988751760] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:13:10,686 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:13:10,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 17] total 44 [2021-11-23 14:13:10,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917400341] [2021-11-23 14:13:10,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:13:10,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 14:13:10,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:13:10,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 14:13:10,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 14:13:10,689 INFO L87 Difference]: Start difference. First operand 129 states and 162 transitions. Second operand has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 44 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:12,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:13:12,524 INFO L93 Difference]: Finished difference Result 346 states and 429 transitions. [2021-11-23 14:13:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-23 14:13:12,525 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 44 states have internal predecessors, (131), 0 states have call successors, (0), 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 63 [2021-11-23 14:13:12,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:13:12,527 INFO L225 Difference]: With dead ends: 346 [2021-11-23 14:13:12,527 INFO L226 Difference]: Without dead ends: 344 [2021-11-23 14:13:12,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 107 SyntacticMatches, 21 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2570 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=733, Invalid=7277, Unknown=0, NotChecked=0, Total=8010 [2021-11-23 14:13:12,528 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 189 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1177 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 14:13:12,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 552 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1177 Invalid, 0 Unknown, 393 Unchecked, 0.6s Time] [2021-11-23 14:13:12,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-23 14:13:12,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 135. [2021-11-23 14:13:12,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.2761194029850746) internal successors, (171), 134 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 171 transitions. [2021-11-23 14:13:12,546 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 171 transitions. Word has length 63 [2021-11-23 14:13:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:13:12,547 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 171 transitions. [2021-11-23 14:13:12,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.977272727272727) internal successors, (131), 44 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 171 transitions. [2021-11-23 14:13:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 14:13:12,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:13:12,548 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:13:12,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 14:13:12,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 14:13:12,775 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:13:12,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:13:12,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1496625062, now seen corresponding path program 5 times [2021-11-23 14:13:12,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:13:12,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467822148] [2021-11-23 14:13:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:13:12,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:13:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:13:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 1 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:13:13,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:13:13,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467822148] [2021-11-23 14:13:13,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467822148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:13:13,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696553106] [2021-11-23 14:13:13,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 14:13:13,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:13:13,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:13:13,410 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:13:13,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 14:13:13,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-23 14:13:13,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:13:13,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 14:13:13,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:13:13,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 14:13:13,733 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-23 14:13:13,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 37 [2021-11-23 14:13:13,840 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-23 14:13:13,840 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 38 treesize of output 37 [2021-11-23 14:13:14,552 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 2 proven. 68 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-23 14:13:14,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:13:25,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 14:13:25,948 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 28 treesize of output 24 [2021-11-23 14:13:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-23 14:13:26,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696553106] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:13:26,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:13:26,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11, 15] total 40 [2021-11-23 14:13:26,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240547537] [2021-11-23 14:13:26,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:13:26,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-23 14:13:26,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:13:26,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-23 14:13:26,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1383, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 14:13:26,022 INFO L87 Difference]: Start difference. First operand 135 states and 171 transitions. Second operand has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 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) [2021-11-23 14:13:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:13:30,121 INFO L93 Difference]: Finished difference Result 303 states and 367 transitions. [2021-11-23 14:13:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-23 14:13:30,122 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 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 63 [2021-11-23 14:13:30,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:13:30,127 INFO L225 Difference]: With dead ends: 303 [2021-11-23 14:13:30,128 INFO L226 Difference]: Without dead ends: 255 [2021-11-23 14:13:30,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 3036 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=1253, Invalid=9874, Unknown=3, NotChecked=0, Total=11130 [2021-11-23 14:13:30,130 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 235 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:13:30,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 413 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 1697 Invalid, 0 Unknown, 163 Unchecked, 0.8s Time] [2021-11-23 14:13:30,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-23 14:13:30,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 80. [2021-11-23 14:13:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 79 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) [2021-11-23 14:13:30,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2021-11-23 14:13:30,148 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 63 [2021-11-23 14:13:30,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:13:30,149 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2021-11-23 14:13:30,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.075) internal successors, (123), 40 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) [2021-11-23 14:13:30,149 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2021-11-23 14:13:30,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 14:13:30,150 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:13:30,150 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:13:30,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 14:13:30,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 14:13:30,350 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:13:30,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:13:30,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1963998444, now seen corresponding path program 11 times [2021-11-23 14:13:30,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:13:30,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056273198] [2021-11-23 14:13:30,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:13:30,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:13:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:13:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 25 proven. 75 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 14:13:30,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:13:30,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056273198] [2021-11-23 14:13:30,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056273198] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:13:30,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000019493] [2021-11-23 14:13:30,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 14:13:30,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:13:30,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:13:30,500 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:13:30,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 14:13:30,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-23 14:13:30,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:13:30,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 14:13:30,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:13:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 14:13:30,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:13:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 36 proven. 64 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 14:13:31,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000019493] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:13:31,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:13:31,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2021-11-23 14:13:31,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782811412] [2021-11-23 14:13:31,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:13:31,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 14:13:31,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:13:31,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 14:13:31,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2021-11-23 14:13:31,060 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 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) [2021-11-23 14:13:31,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:13:31,450 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2021-11-23 14:13:31,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 14:13:31,451 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 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) Word has length 68 [2021-11-23 14:13:31,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:13:31,452 INFO L225 Difference]: With dead ends: 126 [2021-11-23 14:13:31,452 INFO L226 Difference]: Without dead ends: 97 [2021-11-23 14:13:31,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 14:13:31,453 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 244 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:13:31,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 111 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:13:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-23 14:13:31,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2021-11-23 14:13:31,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 79 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) [2021-11-23 14:13:31,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2021-11-23 14:13:31,471 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 68 [2021-11-23 14:13:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:13:31,472 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2021-11-23 14:13:31,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 26 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) [2021-11-23 14:13:31,472 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2021-11-23 14:13:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 14:13:31,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:13:31,473 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:13:31,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 14:13:31,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:13:31,674 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:13:31,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:13:31,674 INFO L85 PathProgramCache]: Analyzing trace with hash -695424892, now seen corresponding path program 12 times [2021-11-23 14:13:31,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:13:31,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714151881] [2021-11-23 14:13:31,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:13:31,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:13:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:13:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:13:32,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:13:32,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714151881] [2021-11-23 14:13:32,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714151881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:13:32,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349052882] [2021-11-23 14:13:32,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 14:13:32,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:13:32,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:13:32,039 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:13:32,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 14:13:32,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-23 14:13:32,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:13:32,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 14:13:32,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:13:32,362 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 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-23 14:13:33,252 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-23 14:13:33,252 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 53 treesize of output 42 [2021-11-23 14:13:33,290 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 13 proven. 142 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 14:13:33,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:13:33,677 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 36 treesize of output 30 [2021-11-23 14:13:33,682 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 14:13:33,683 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 47 treesize of output 31 [2021-11-23 14:13:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-23 14:13:34,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349052882] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:13:34,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:13:34,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 21] total 52 [2021-11-23 14:13:34,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480833317] [2021-11-23 14:13:34,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:13:34,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-23 14:13:34,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:13:34,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-23 14:13:34,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2334, Unknown=0, NotChecked=0, Total=2652 [2021-11-23 14:13:34,033 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 52 states, 52 states have (on average 3.019230769230769) internal successors, (157), 52 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:35,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:13:35,800 INFO L93 Difference]: Finished difference Result 166 states and 187 transitions. [2021-11-23 14:13:35,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-23 14:13:35,801 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.019230769230769) internal successors, (157), 52 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-23 14:13:35,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:13:35,802 INFO L225 Difference]: With dead ends: 166 [2021-11-23 14:13:35,802 INFO L226 Difference]: Without dead ends: 164 [2021-11-23 14:13:35,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 127 SyntacticMatches, 8 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2543 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=865, Invalid=9035, Unknown=0, NotChecked=0, Total=9900 [2021-11-23 14:13:35,804 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 119 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 14:13:35,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 524 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1458 Invalid, 0 Unknown, 165 Unchecked, 0.6s Time] [2021-11-23 14:13:35,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-23 14:13:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 93. [2021-11-23 14:13:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2021-11-23 14:13:35,827 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 71 [2021-11-23 14:13:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:13:35,827 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2021-11-23 14:13:35,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.019230769230769) internal successors, (157), 52 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:35,828 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2021-11-23 14:13:35,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 14:13:35,828 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:13:35,828 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:13:35,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 14:13:36,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-23 14:13:36,039 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:13:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:13:36,039 INFO L85 PathProgramCache]: Analyzing trace with hash -37974764, now seen corresponding path program 13 times [2021-11-23 14:13:36,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:13:36,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825660694] [2021-11-23 14:13:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:13:36,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:13:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:13:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 73 proven. 68 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 14:13:36,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:13:36,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825660694] [2021-11-23 14:13:36,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825660694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:13:36,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775538818] [2021-11-23 14:13:36,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 14:13:36,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:13:36,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:13:36,211 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:13:36,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 14:13:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:13:36,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 14:13:36,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:13:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 14:13:36,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:13:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 92 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 14:13:36,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775538818] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:13:36,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:13:36,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2021-11-23 14:13:36,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742237865] [2021-11-23 14:13:36,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:13:36,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 14:13:36,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:13:36,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 14:13:36,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2021-11-23 14:13:36,696 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:37,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:13:37,011 INFO L93 Difference]: Finished difference Result 213 states and 247 transitions. [2021-11-23 14:13:37,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 14:13:37,011 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 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 [2021-11-23 14:13:37,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:13:37,012 INFO L225 Difference]: With dead ends: 213 [2021-11-23 14:13:37,012 INFO L226 Difference]: Without dead ends: 112 [2021-11-23 14:13:37,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 14:13:37,013 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 267 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:13:37,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 172 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:13:37,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-23 14:13:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 88. [2021-11-23 14:13:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1724137931034482) internal successors, (102), 87 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:37,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2021-11-23 14:13:37,035 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 74 [2021-11-23 14:13:37,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:13:37,035 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2021-11-23 14:13:37,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 29 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:37,036 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2021-11-23 14:13:37,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-23 14:13:37,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:13:37,037 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:13:37,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 14:13:37,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:13:37,254 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:13:37,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:13:37,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1514849554, now seen corresponding path program 14 times [2021-11-23 14:13:37,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:13:37,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740705203] [2021-11-23 14:13:37,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:13:37,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:13:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:13:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:13:37,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:13:37,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740705203] [2021-11-23 14:13:37,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740705203] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:13:37,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937380273] [2021-11-23 14:13:37,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:13:37,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:13:37,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:13:37,926 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:13:37,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 14:13:37,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:13:37,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:13:37,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-23 14:13:37,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:13:38,051 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:38,071 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:38,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:38,101 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:38,117 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:38,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:38,178 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:13:38,220 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 14:13:38,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2021-11-23 14:13:38,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:13:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 14:13:38,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:13:39,331 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 82 treesize of output 70 [2021-11-23 14:13:39,348 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:13:39,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 290 treesize of output 242 [2021-11-23 14:13:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-23 14:13:39,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937380273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:13:39,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:13:39,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 19, 20] total 56 [2021-11-23 14:13:39,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002455050] [2021-11-23 14:13:39,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:13:39,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-23 14:13:39,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:13:39,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-23 14:13:39,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2842, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 14:13:39,386 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 56 states, 56 states have (on average 3.1785714285714284) internal successors, (178), 56 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) [2021-11-23 14:13:42,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:13:42,896 INFO L93 Difference]: Finished difference Result 154 states and 173 transitions. [2021-11-23 14:13:42,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-23 14:13:42,897 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.1785714285714284) internal successors, (178), 56 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) Word has length 76 [2021-11-23 14:13:42,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:13:42,898 INFO L225 Difference]: With dead ends: 154 [2021-11-23 14:13:42,898 INFO L226 Difference]: Without dead ends: 152 [2021-11-23 14:13:42,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 117 SyntacticMatches, 12 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4608 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1384, Invalid=15646, Unknown=0, NotChecked=0, Total=17030 [2021-11-23 14:13:42,901 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 262 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:13:42,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 558 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 14:13:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-23 14:13:42,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 92. [2021-11-23 14:13:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.164835164835165) internal successors, (106), 91 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) [2021-11-23 14:13:42,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-11-23 14:13:42,919 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 76 [2021-11-23 14:13:42,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:13:42,919 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-11-23 14:13:42,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.1785714285714284) internal successors, (178), 56 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) [2021-11-23 14:13:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-11-23 14:13:42,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-23 14:13:42,920 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:13:42,920 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:13:42,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 14:13:43,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 14:13:43,131 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:13:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:13:43,131 INFO L85 PathProgramCache]: Analyzing trace with hash 122414920, now seen corresponding path program 15 times [2021-11-23 14:13:43,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:13:43,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684843838] [2021-11-23 14:13:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:13:43,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:13:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:13:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:13:43,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:13:43,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684843838] [2021-11-23 14:13:43,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684843838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:13:43,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755406676] [2021-11-23 14:13:43,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:13:43,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:13:43,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:13:43,510 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:13:43,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 14:13:43,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-23 14:13:43,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:13:43,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-23 14:13:43,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:13:43,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-23 14:13:43,704 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:43,727 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:43,752 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:43,777 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:43,803 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:43,830 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:43,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:43,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-23 14:13:44,695 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-23 14:13:44,695 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 50 treesize of output 39 [2021-11-23 14:13:44,741 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:13:44,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:13:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-23 14:13:46,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755406676] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:13:46,531 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:13:46,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 31, 23] total 63 [2021-11-23 14:13:46,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100267481] [2021-11-23 14:13:46,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:13:46,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-23 14:13:46,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:13:46,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-23 14:13:46,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=3350, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 14:13:46,533 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 63 states, 63 states have (on average 3.126984126984127) internal successors, (197), 63 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:52,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:13:52,428 INFO L93 Difference]: Finished difference Result 301 states and 345 transitions. [2021-11-23 14:13:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-11-23 14:13:52,429 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.126984126984127) internal successors, (197), 63 states have internal predecessors, (197), 0 states have call successors, (0), 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 [2021-11-23 14:13:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:13:52,431 INFO L225 Difference]: With dead ends: 301 [2021-11-23 14:13:52,431 INFO L226 Difference]: Without dead ends: 299 [2021-11-23 14:13:52,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 131 SyntacticMatches, 17 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7689 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2722, Invalid=22716, Unknown=2, NotChecked=0, Total=25440 [2021-11-23 14:13:52,434 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 284 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 14:13:52,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 653 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1166 Invalid, 0 Unknown, 427 Unchecked, 0.6s Time] [2021-11-23 14:13:52,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-23 14:13:52,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 174. [2021-11-23 14:13:52,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.1965317919075145) internal successors, (207), 173 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 207 transitions. [2021-11-23 14:13:52,490 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 207 transitions. Word has length 80 [2021-11-23 14:13:52,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:13:52,490 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 207 transitions. [2021-11-23 14:13:52,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.126984126984127) internal successors, (197), 63 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:52,491 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 207 transitions. [2021-11-23 14:13:52,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 14:13:52,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:13:52,492 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:13:52,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 14:13:52,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 14:13:52,699 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:13:52,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:13:52,700 INFO L85 PathProgramCache]: Analyzing trace with hash 923215356, now seen corresponding path program 16 times [2021-11-23 14:13:52,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:13:52,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187895242] [2021-11-23 14:13:52,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:13:52,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:13:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:13:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 95 proven. 86 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-23 14:13:52,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:13:52,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187895242] [2021-11-23 14:13:52,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187895242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:13:52,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106040515] [2021-11-23 14:13:52,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:13:52,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:13:52,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:13:52,903 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:13:52,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 14:13:52,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:13:52,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:13:52,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 14:13:52,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:13:53,391 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-23 14:13:53,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:13:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 117 proven. 64 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-11-23 14:13:53,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106040515] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:13:53,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:13:53,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2021-11-23 14:13:53,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950794273] [2021-11-23 14:13:53,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:13:53,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-23 14:13:53,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:13:53,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-23 14:13:53,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2021-11-23 14:13:53,563 INFO L87 Difference]: Start difference. First operand 174 states and 207 transitions. Second operand has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:53,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:13:53,997 INFO L93 Difference]: Finished difference Result 394 states and 464 transitions. [2021-11-23 14:13:53,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 14:13:53,998 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 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 83 [2021-11-23 14:13:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:13:54,000 INFO L225 Difference]: With dead ends: 394 [2021-11-23 14:13:54,000 INFO L226 Difference]: Without dead ends: 197 [2021-11-23 14:13:54,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 14:13:54,002 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 309 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:13:54,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 150 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 14:13:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-23 14:13:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 145. [2021-11-23 14:13:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.2152777777777777) internal successors, (175), 144 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 175 transitions. [2021-11-23 14:13:54,049 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 175 transitions. Word has length 83 [2021-11-23 14:13:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:13:54,049 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 175 transitions. [2021-11-23 14:13:54,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 32 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:13:54,050 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 175 transitions. [2021-11-23 14:13:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-23 14:13:54,051 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:13:54,051 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:13:54,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 14:13:54,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:13:54,269 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:13:54,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:13:54,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1113918398, now seen corresponding path program 17 times [2021-11-23 14:13:54,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:13:54,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639415440] [2021-11-23 14:13:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:13:54,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:13:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:13:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:13:55,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:13:55,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639415440] [2021-11-23 14:13:55,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639415440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:13:55,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163967951] [2021-11-23 14:13:55,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 14:13:55,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:13:55,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:13:55,102 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:13:55,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 14:13:55,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-23 14:13:55,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:13:55,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-23 14:13:55,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:13:55,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:55,441 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:55,462 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:13:55,530 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:13:55,595 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 14:13:55,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2021-11-23 14:13:55,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:13:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 14:13:55,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:13:56,772 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 82 treesize of output 70 [2021-11-23 14:13:56,786 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:13:56,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 290 treesize of output 242 [2021-11-23 14:13:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 213 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-11-23 14:13:56,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163967951] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:13:56,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:13:56,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 21, 22] total 58 [2021-11-23 14:13:56,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276741031] [2021-11-23 14:13:56,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:13:56,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-23 14:13:56,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:13:56,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-23 14:13:56,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=3053, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 14:13:56,901 INFO L87 Difference]: Start difference. First operand 145 states and 175 transitions. Second operand has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:01,131 INFO L93 Difference]: Finished difference Result 248 states and 283 transitions. [2021-11-23 14:14:01,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-23 14:14:01,132 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 0 states have call successors, (0), 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 85 [2021-11-23 14:14:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:01,134 INFO L225 Difference]: With dead ends: 248 [2021-11-23 14:14:01,134 INFO L226 Difference]: Without dead ends: 246 [2021-11-23 14:14:01,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 138 SyntacticMatches, 10 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5405 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1538, Invalid=18484, Unknown=0, NotChecked=0, Total=20022 [2021-11-23 14:14:01,136 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 303 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 2947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:01,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 651 Invalid, 2947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 14:14:01,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-23 14:14:01,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 104. [2021-11-23 14:14:01,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1650485436893203) internal successors, (120), 103 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) [2021-11-23 14:14:01,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2021-11-23 14:14:01,169 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 85 [2021-11-23 14:14:01,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:01,170 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2021-11-23 14:14:01,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2586206896551726) internal successors, (189), 58 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:01,170 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2021-11-23 14:14:01,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-23 14:14:01,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:01,171 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:01,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 14:14:01,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:01,391 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:01,391 INFO L85 PathProgramCache]: Analyzing trace with hash 910882804, now seen corresponding path program 18 times [2021-11-23 14:14:01,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:01,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660226448] [2021-11-23 14:14:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:01,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:01,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:02,287 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:02,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:02,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660226448] [2021-11-23 14:14:02,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660226448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:02,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458189832] [2021-11-23 14:14:02,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 14:14:02,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:02,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:02,288 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:02,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 14:14:02,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-23 14:14:02,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:14:02,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-23 14:14:02,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:02,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 14:14:02,676 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:02,698 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:02,711 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:02,721 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:02,732 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:02,742 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:02,757 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:02,767 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:02,822 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 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-23 14:14:03,790 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-23 14:14:03,791 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 53 treesize of output 42 [2021-11-23 14:14:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 25 proven. 209 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-23 14:14:03,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:14:05,776 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 69 treesize of output 63 [2021-11-23 14:14:05,781 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 14:14:05,782 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 399 treesize of output 361 [2021-11-23 14:14:06,387 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-23 14:14:06,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458189832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:14:06,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:14:06,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 27, 28] total 77 [2021-11-23 14:14:06,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885502070] [2021-11-23 14:14:06,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:14:06,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-23 14:14:06,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:06,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-23 14:14:06,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=723, Invalid=5129, Unknown=0, NotChecked=0, Total=5852 [2021-11-23 14:14:06,389 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 77 states, 77 states have (on average 2.5584415584415585) internal successors, (197), 77 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:15,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:15,807 INFO L93 Difference]: Finished difference Result 383 states and 435 transitions. [2021-11-23 14:14:15,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 215 states. [2021-11-23 14:14:15,807 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.5584415584415585) internal successors, (197), 77 states have internal predecessors, (197), 0 states have call successors, (0), 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 89 [2021-11-23 14:14:15,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:15,809 INFO L225 Difference]: With dead ends: 383 [2021-11-23 14:14:15,809 INFO L226 Difference]: Without dead ends: 381 [2021-11-23 14:14:15,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 132 SyntacticMatches, 21 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20887 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=5275, Invalid=54505, Unknown=0, NotChecked=0, Total=59780 [2021-11-23 14:14:15,814 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 393 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 533 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:15,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 1007 Invalid, 2155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 1247 Invalid, 0 Unknown, 533 Unchecked, 0.8s Time] [2021-11-23 14:14:15,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-11-23 14:14:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 197. [2021-11-23 14:14:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.1938775510204083) internal successors, (234), 196 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) [2021-11-23 14:14:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 234 transitions. [2021-11-23 14:14:15,879 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 234 transitions. Word has length 89 [2021-11-23 14:14:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:15,880 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 234 transitions. [2021-11-23 14:14:15,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.5584415584415585) internal successors, (197), 77 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:15,880 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 234 transitions. [2021-11-23 14:14:15,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-23 14:14:15,881 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:15,881 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:15,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 14:14:16,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 14:14:16,088 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:16,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:16,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2060891820, now seen corresponding path program 6 times [2021-11-23 14:14:16,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:16,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033532945] [2021-11-23 14:14:16,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:16,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 129 proven. 114 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-23 14:14:16,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033532945] [2021-11-23 14:14:16,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033532945] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:16,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948211469] [2021-11-23 14:14:16,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 14:14:16,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:16,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:16,339 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:16,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 14:14:17,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-23 14:14:17,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:14:17,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 14:14:17,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 162 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-23 14:14:17,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:14:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 162 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-11-23 14:14:17,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948211469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:14:17,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:14:17,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2021-11-23 14:14:17,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756010783] [2021-11-23 14:14:17,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:14:17,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 14:14:17,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:17,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 14:14:17,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 14:14:17,644 INFO L87 Difference]: Start difference. First operand 197 states and 234 transitions. Second operand has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 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) [2021-11-23 14:14:18,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:18,091 INFO L93 Difference]: Finished difference Result 344 states and 388 transitions. [2021-11-23 14:14:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 14:14:18,091 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 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 93 [2021-11-23 14:14:18,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:18,092 INFO L225 Difference]: With dead ends: 344 [2021-11-23 14:14:18,093 INFO L226 Difference]: Without dead ends: 136 [2021-11-23 14:14:18,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 14:14:18,094 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 384 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:18,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 189 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 14:14:18,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-23 14:14:18,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 112. [2021-11-23 14:14:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.1711711711711712) internal successors, (130), 111 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) [2021-11-23 14:14:18,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 130 transitions. [2021-11-23 14:14:18,132 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 130 transitions. Word has length 93 [2021-11-23 14:14:18,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:18,132 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 130 transitions. [2021-11-23 14:14:18,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 35 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) [2021-11-23 14:14:18,133 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 130 transitions. [2021-11-23 14:14:18,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-23 14:14:18,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:18,133 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:18,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 14:14:18,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 14:14:18,347 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:18,347 INFO L85 PathProgramCache]: Analyzing trace with hash 230048378, now seen corresponding path program 19 times [2021-11-23 14:14:18,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:18,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781837630] [2021-11-23 14:14:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:18,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:14:18,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:18,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781837630] [2021-11-23 14:14:18,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781837630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:18,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340269237] [2021-11-23 14:14:18,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 14:14:18,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:18,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:18,959 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:18,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 14:14:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:19,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-23 14:14:19,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:19,137 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:19,152 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:19,166 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:19,181 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:19,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:19,220 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:19,241 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:19,256 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:19,300 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:14:19,355 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 0 case distinctions, treesize of input 50 treesize of output 41 [2021-11-23 14:14:19,374 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 14:14:19,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 53 [2021-11-23 14:14:19,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:14:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 367 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 14:14:19,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:14:20,890 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 82 treesize of output 70 [2021-11-23 14:14:20,902 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:14:20,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 189 treesize of output 165 [2021-11-23 14:14:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 271 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-23 14:14:20,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340269237] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:14:20,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:14:20,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 24] total 54 [2021-11-23 14:14:20,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110684449] [2021-11-23 14:14:20,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:14:20,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-23 14:14:20,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:20,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-23 14:14:20,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2678, Unknown=0, NotChecked=0, Total=2862 [2021-11-23 14:14:20,949 INFO L87 Difference]: Start difference. First operand 112 states and 130 transitions. Second operand has 54 states, 54 states have (on average 3.5925925925925926) internal successors, (194), 54 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:23,641 INFO L93 Difference]: Finished difference Result 211 states and 238 transitions. [2021-11-23 14:14:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-23 14:14:23,641 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.5925925925925926) internal successors, (194), 54 states have internal predecessors, (194), 0 states have call successors, (0), 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 [2021-11-23 14:14:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:23,642 INFO L225 Difference]: With dead ends: 211 [2021-11-23 14:14:23,643 INFO L226 Difference]: Without dead ends: 209 [2021-11-23 14:14:23,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 141 SyntacticMatches, 29 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=612, Invalid=9690, Unknown=0, NotChecked=0, Total=10302 [2021-11-23 14:14:23,645 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 200 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 2930 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 3131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:23,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 682 Invalid, 3131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2930 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 14:14:23,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-23 14:14:23,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 116. [2021-11-23 14:14:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1652173913043478) internal successors, (134), 115 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) [2021-11-23 14:14:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 134 transitions. [2021-11-23 14:14:23,684 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 134 transitions. Word has length 94 [2021-11-23 14:14:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:23,685 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 134 transitions. [2021-11-23 14:14:23,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.5925925925925926) internal successors, (194), 54 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 134 transitions. [2021-11-23 14:14:23,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-23 14:14:23,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:23,686 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:23,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 14:14:23,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 14:14:23,911 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:23,911 INFO L85 PathProgramCache]: Analyzing trace with hash -194350928, now seen corresponding path program 20 times [2021-11-23 14:14:23,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:23,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016271026] [2021-11-23 14:14:23,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:23,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:24,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:24,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016271026] [2021-11-23 14:14:24,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016271026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:24,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786309865] [2021-11-23 14:14:24,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:14:24,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:24,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:24,544 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:24,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-23 14:14:24,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:14:24,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:14:24,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-23 14:14:24,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:24,741 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:24,762 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:24,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:24,801 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:24,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:24,840 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:24,859 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:24,882 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:24,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:24,966 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:14:25,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:14:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:14:25,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:14:26,734 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 82 treesize of output 70 [2021-11-23 14:14:26,765 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:14:26,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 290 treesize of output 242 [2021-11-23 14:14:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 307 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 14:14:26,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786309865] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:14:26,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:14:26,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 58 [2021-11-23 14:14:26,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732469891] [2021-11-23 14:14:26,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:14:26,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-23 14:14:26,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:26,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-23 14:14:26,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=3106, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 14:14:26,824 INFO L87 Difference]: Start difference. First operand 116 states and 134 transitions. Second operand has 58 states, 58 states have (on average 3.586206896551724) internal successors, (208), 58 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:30,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:30,023 INFO L93 Difference]: Finished difference Result 200 states and 225 transitions. [2021-11-23 14:14:30,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-23 14:14:30,023 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.586206896551724) internal successors, (208), 58 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-23 14:14:30,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:30,024 INFO L225 Difference]: With dead ends: 200 [2021-11-23 14:14:30,024 INFO L226 Difference]: Without dead ends: 198 [2021-11-23 14:14:30,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 152 SyntacticMatches, 23 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2637 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=611, Invalid=10101, Unknown=0, NotChecked=0, Total=10712 [2021-11-23 14:14:30,026 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 202 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 3599 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 3794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 3599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:30,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 784 Invalid, 3794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 3599 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 14:14:30,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-23 14:14:30,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 120. [2021-11-23 14:14:30,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 119 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 138 transitions. [2021-11-23 14:14:30,060 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 138 transitions. Word has length 98 [2021-11-23 14:14:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:30,061 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 138 transitions. [2021-11-23 14:14:30,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.586206896551724) internal successors, (208), 58 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 138 transitions. [2021-11-23 14:14:30,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 14:14:30,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:30,061 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:30,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-23 14:14:30,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 14:14:30,262 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:30,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:30,262 INFO L85 PathProgramCache]: Analyzing trace with hash -330263578, now seen corresponding path program 21 times [2021-11-23 14:14:30,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:30,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77319530] [2021-11-23 14:14:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:30,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 163 proven. 137 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-23 14:14:30,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:30,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77319530] [2021-11-23 14:14:30,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77319530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:30,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97164192] [2021-11-23 14:14:30,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:14:30,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:30,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:30,547 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:30,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 14:14:30,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 14:14:30,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:14:30,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 14:14:30,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 200 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 14:14:31,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:14:31,638 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 200 proven. 145 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 14:14:31,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97164192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:14:31,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:14:31,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2021-11-23 14:14:31,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466785456] [2021-11-23 14:14:31,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:14:31,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-23 14:14:31,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:31,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-23 14:14:31,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 14:14:31,641 INFO L87 Difference]: Start difference. First operand 120 states and 138 transitions. Second operand has 38 states, 38 states have (on average 4.157894736842105) internal successors, (158), 38 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:32,100 INFO L93 Difference]: Finished difference Result 293 states and 339 transitions. [2021-11-23 14:14:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-23 14:14:32,100 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.157894736842105) internal successors, (158), 38 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) Word has length 102 [2021-11-23 14:14:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:32,102 INFO L225 Difference]: With dead ends: 293 [2021-11-23 14:14:32,102 INFO L226 Difference]: Without dead ends: 146 [2021-11-23 14:14:32,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 14:14:32,104 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 432 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:32,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 181 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 14:14:32,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-23 14:14:32,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 128. [2021-11-23 14:14:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.1653543307086613) internal successors, (148), 127 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 148 transitions. [2021-11-23 14:14:32,148 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 148 transitions. Word has length 102 [2021-11-23 14:14:32,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:32,148 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 148 transitions. [2021-11-23 14:14:32,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.157894736842105) internal successors, (158), 38 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:32,148 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 148 transitions. [2021-11-23 14:14:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 14:14:32,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:32,149 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:32,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-23 14:14:32,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:32,375 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:32,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:32,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1409534820, now seen corresponding path program 22 times [2021-11-23 14:14:32,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:32,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695123969] [2021-11-23 14:14:32,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:32,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:33,034 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:33,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:33,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695123969] [2021-11-23 14:14:33,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695123969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:33,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284145533] [2021-11-23 14:14:33,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:14:33,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:33,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:33,035 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:33,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 14:14:33,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:14:33,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:14:33,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-23 14:14:33,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:33,161 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:33,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:33,196 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:33,209 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:33,223 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:33,237 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:33,252 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:33,268 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:33,284 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:33,329 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:14:33,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:14:33,828 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 14:14:33,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:14:35,186 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 82 treesize of output 70 [2021-11-23 14:14:35,196 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:14:35,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 189 treesize of output 165 [2021-11-23 14:14:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 14:14:35,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284145533] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:14:35,250 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:14:35,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 28] total 62 [2021-11-23 14:14:35,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492149200] [2021-11-23 14:14:35,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:14:35,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-23 14:14:35,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:35,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-23 14:14:35,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=3568, Unknown=0, NotChecked=0, Total=3782 [2021-11-23 14:14:35,252 INFO L87 Difference]: Start difference. First operand 128 states and 148 transitions. Second operand has 62 states, 62 states have (on average 3.6129032258064515) internal successors, (224), 62 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) [2021-11-23 14:14:38,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:38,646 INFO L93 Difference]: Finished difference Result 218 states and 245 transitions. [2021-11-23 14:14:38,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-23 14:14:38,646 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.6129032258064515) internal successors, (224), 62 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) Word has length 107 [2021-11-23 14:14:38,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:38,648 INFO L225 Difference]: With dead ends: 218 [2021-11-23 14:14:38,648 INFO L226 Difference]: Without dead ends: 216 [2021-11-23 14:14:38,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 168 SyntacticMatches, 24 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3030 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=656, Invalid=11776, Unknown=0, NotChecked=0, Total=12432 [2021-11-23 14:14:38,650 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 174 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 4248 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 4428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 4248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:38,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 972 Invalid, 4428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 4248 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-23 14:14:38,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-23 14:14:38,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 132. [2021-11-23 14:14:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.1603053435114503) internal successors, (152), 131 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 152 transitions. [2021-11-23 14:14:38,704 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 152 transitions. Word has length 107 [2021-11-23 14:14:38,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:38,704 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 152 transitions. [2021-11-23 14:14:38,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.6129032258064515) internal successors, (224), 62 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) [2021-11-23 14:14:38,704 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 152 transitions. [2021-11-23 14:14:38,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-23 14:14:38,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:38,705 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:38,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-23 14:14:38,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:38,907 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:38,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:38,908 INFO L85 PathProgramCache]: Analyzing trace with hash -711625574, now seen corresponding path program 23 times [2021-11-23 14:14:38,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:38,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742587188] [2021-11-23 14:14:38,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:38,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 201 proven. 162 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-23 14:14:39,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:39,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742587188] [2021-11-23 14:14:39,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742587188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:39,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514156383] [2021-11-23 14:14:39,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 14:14:39,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:39,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:39,232 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:39,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-23 14:14:39,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-23 14:14:39,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:14:39,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 14:14:39,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 242 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-23 14:14:40,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:14:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 539 backedges. 242 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-23 14:14:40,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514156383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:14:40,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:14:40,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2021-11-23 14:14:40,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513183798] [2021-11-23 14:14:40,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:14:40,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-23 14:14:40,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:40,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-23 14:14:40,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 14:14:40,246 INFO L87 Difference]: Start difference. First operand 132 states and 152 transitions. Second operand has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:40,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:14:40,706 INFO L93 Difference]: Finished difference Result 319 states and 369 transitions. [2021-11-23 14:14:40,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 14:14:40,707 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-23 14:14:40,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:14:40,708 INFO L225 Difference]: With dead ends: 319 [2021-11-23 14:14:40,708 INFO L226 Difference]: Without dead ends: 158 [2021-11-23 14:14:40,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 14:14:40,709 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 441 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 14:14:40,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 184 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 14:14:40,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-23 14:14:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 140. [2021-11-23 14:14:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1654676258992807) internal successors, (162), 139 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) [2021-11-23 14:14:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2021-11-23 14:14:40,747 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 111 [2021-11-23 14:14:40,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:14:40,747 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2021-11-23 14:14:40,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.292682926829268) internal successors, (135), 41 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:14:40,747 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2021-11-23 14:14:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 14:14:40,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:14:40,748 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:14:40,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-23 14:14:40,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:40,975 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:14:40,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:14:40,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1109917208, now seen corresponding path program 24 times [2021-11-23 14:14:40,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:14:40,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164434583] [2021-11-23 14:14:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:14:40,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:14:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:14:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:14:42,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:14:42,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164434583] [2021-11-23 14:14:42,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164434583] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:14:42,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54865047] [2021-11-23 14:14:42,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 14:14:42,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:14:42,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:14:42,084 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:14:42,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 14:14:42,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-23 14:14:42,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:14:42,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-23 14:14:42,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:14:42,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 14:14:42,408 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:42,424 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:42,438 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:42,454 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:42,468 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:42,482 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:42,496 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:42,519 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:42,532 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:42,548 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:42,561 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:14:42,622 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 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-23 14:14:44,170 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-23 14:14:44,170 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 61 treesize of output 48 [2021-11-23 14:14:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 23 proven. 452 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 14:14:44,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:14:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 220 proven. 232 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-23 14:14:52,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54865047] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:14:52,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:14:52,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 33, 31] total 92 [2021-11-23 14:14:52,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267271273] [2021-11-23 14:14:52,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:14:52,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-23 14:14:52,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:14:52,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-23 14:14:52,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1168, Invalid=7201, Unknown=3, NotChecked=0, Total=8372 [2021-11-23 14:14:52,777 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand has 92 states, 92 states have (on average 3.1739130434782608) internal successors, (292), 92 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) [2021-11-23 14:15:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:15,085 INFO L93 Difference]: Finished difference Result 389 states and 462 transitions. [2021-11-23 14:15:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-11-23 14:15:15,086 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.1739130434782608) internal successors, (292), 92 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 116 [2021-11-23 14:15:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:15,088 INFO L225 Difference]: With dead ends: 389 [2021-11-23 14:15:15,088 INFO L226 Difference]: Without dead ends: 294 [2021-11-23 14:15:15,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 218 SyntacticMatches, 27 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10399 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=4711, Invalid=27850, Unknown=19, NotChecked=0, Total=32580 [2021-11-23 14:15:15,090 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 630 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 3540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1397 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:15,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 1374 Invalid, 3540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2088 Invalid, 0 Unknown, 1397 Unchecked, 0.9s Time] [2021-11-23 14:15:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-11-23 14:15:15,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 223. [2021-11-23 14:15:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.2297297297297298) internal successors, (273), 222 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:15,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 273 transitions. [2021-11-23 14:15:15,162 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 273 transitions. Word has length 116 [2021-11-23 14:15:15,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:15,162 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 273 transitions. [2021-11-23 14:15:15,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.1739130434782608) internal successors, (292), 92 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) [2021-11-23 14:15:15,162 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 273 transitions. [2021-11-23 14:15:15,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 14:15:15,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:15,163 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:15,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-23 14:15:15,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:15:15,364 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:15,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:15,364 INFO L85 PathProgramCache]: Analyzing trace with hash -918668902, now seen corresponding path program 7 times [2021-11-23 14:15:15,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:15,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615933245] [2021-11-23 14:15:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:15,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:16,430 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:16,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:16,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615933245] [2021-11-23 14:15:16,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615933245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:15:16,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040628686] [2021-11-23 14:15:16,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 14:15:16,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:15:16,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:15:16,432 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:15:16,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 14:15:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:16,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-23 14:15:16,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:15:16,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-23 14:15:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-23 14:15:17,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:15:18,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 14:15:18,006 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 28 treesize of output 24 [2021-11-23 14:15:18,163 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-23 14:15:18,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040628686] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:15:18,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:15:18,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 28, 28] total 69 [2021-11-23 14:15:18,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152060071] [2021-11-23 14:15:18,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:15:18,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-23 14:15:18,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:18,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-23 14:15:18,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=4373, Unknown=0, NotChecked=0, Total=4692 [2021-11-23 14:15:18,165 INFO L87 Difference]: Start difference. First operand 223 states and 273 transitions. Second operand has 69 states, 69 states have (on average 3.6231884057971016) internal successors, (250), 69 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) [2021-11-23 14:15:23,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:23,158 INFO L93 Difference]: Finished difference Result 350 states and 410 transitions. [2021-11-23 14:15:23,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-23 14:15:23,158 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.6231884057971016) internal successors, (250), 69 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 116 [2021-11-23 14:15:23,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:23,160 INFO L225 Difference]: With dead ends: 350 [2021-11-23 14:15:23,160 INFO L226 Difference]: Without dead ends: 348 [2021-11-23 14:15:23,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 203 SyntacticMatches, 5 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5012 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1625, Invalid=19545, Unknown=0, NotChecked=0, Total=21170 [2021-11-23 14:15:23,161 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 415 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 4604 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 4960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 4604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:23,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 1094 Invalid, 4960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 4604 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 14:15:23,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-11-23 14:15:23,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 254. [2021-11-23 14:15:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.2411067193675889) internal successors, (314), 253 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) [2021-11-23 14:15:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 314 transitions. [2021-11-23 14:15:23,221 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 314 transitions. Word has length 116 [2021-11-23 14:15:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:23,222 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 314 transitions. [2021-11-23 14:15:23,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.6231884057971016) internal successors, (250), 69 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) [2021-11-23 14:15:23,222 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 314 transitions. [2021-11-23 14:15:23,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-23 14:15:23,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:23,223 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:23,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-23 14:15:23,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:15:23,423 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:23,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1253968788, now seen corresponding path program 8 times [2021-11-23 14:15:23,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:23,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117826297] [2021-11-23 14:15:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:23,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:24,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:24,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117826297] [2021-11-23 14:15:24,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117826297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:15:24,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007021981] [2021-11-23 14:15:24,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:15:24,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:15:24,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:15:24,199 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:15:24,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 14:15:24,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:15:24,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:15:24,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-23 14:15:24,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:15:24,623 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:15:25,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:15:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:15:25,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:15:25,804 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 34 treesize of output 28 [2021-11-23 14:15:25,812 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 14:15:25,812 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 36 treesize of output 26 [2021-11-23 14:15:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 452 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-23 14:15:25,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007021981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:15:25,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:15:25,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 56 [2021-11-23 14:15:25,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091354415] [2021-11-23 14:15:25,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:15:25,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-23 14:15:25,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:25,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-23 14:15:25,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=2894, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 14:15:25,969 INFO L87 Difference]: Start difference. First operand 254 states and 314 transitions. Second operand has 56 states, 56 states have (on average 3.857142857142857) internal successors, (216), 56 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) [2021-11-23 14:15:29,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:29,645 INFO L93 Difference]: Finished difference Result 403 states and 468 transitions. [2021-11-23 14:15:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-23 14:15:29,645 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.857142857142857) internal successors, (216), 56 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) Word has length 116 [2021-11-23 14:15:29,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:29,647 INFO L225 Difference]: With dead ends: 403 [2021-11-23 14:15:29,648 INFO L226 Difference]: Without dead ends: 401 [2021-11-23 14:15:29,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 201 SyntacticMatches, 18 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2786 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=617, Invalid=11373, Unknown=0, NotChecked=0, Total=11990 [2021-11-23 14:15:29,650 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 120 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 5193 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 5316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 5193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:29,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 1726 Invalid, 5316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 5193 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 14:15:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-23 14:15:29,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 227. [2021-11-23 14:15:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.2256637168141593) internal successors, (277), 226 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) [2021-11-23 14:15:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 277 transitions. [2021-11-23 14:15:29,744 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 277 transitions. Word has length 116 [2021-11-23 14:15:29,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:29,745 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 277 transitions. [2021-11-23 14:15:29,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.857142857142857) internal successors, (216), 56 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) [2021-11-23 14:15:29,745 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 277 transitions. [2021-11-23 14:15:29,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-23 14:15:29,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:29,747 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:29,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-23 14:15:29,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-23 14:15:29,973 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:29,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:29,973 INFO L85 PathProgramCache]: Analyzing trace with hash 786552784, now seen corresponding path program 9 times [2021-11-23 14:15:29,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:29,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063668062] [2021-11-23 14:15:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:29,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 243 proven. 189 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-23 14:15:30,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:30,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063668062] [2021-11-23 14:15:30,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063668062] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:15:30,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021070886] [2021-11-23 14:15:30,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:15:30,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:15:30,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:15:30,309 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:15:30,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 14:15:30,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-23 14:15:30,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:15:30,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 14:15:30,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:15:31,162 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 288 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-23 14:15:31,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:15:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 288 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-23 14:15:31,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021070886] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:15:31,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:15:31,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2021-11-23 14:15:31,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939995297] [2021-11-23 14:15:31,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:15:31,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-23 14:15:31,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:31,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-23 14:15:31,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 14:15:31,422 INFO L87 Difference]: Start difference. First operand 227 states and 277 transitions. Second operand has 44 states, 44 states have (on average 3.3181818181818183) internal successors, (146), 44 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:32,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:32,026 INFO L93 Difference]: Finished difference Result 439 states and 522 transitions. [2021-11-23 14:15:32,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-23 14:15:32,032 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.3181818181818183) internal successors, (146), 44 states have internal predecessors, (146), 0 states have call successors, (0), 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 120 [2021-11-23 14:15:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:32,033 INFO L225 Difference]: With dead ends: 439 [2021-11-23 14:15:32,033 INFO L226 Difference]: Without dead ends: 194 [2021-11-23 14:15:32,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 14:15:32,034 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 614 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:32,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 212 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 14:15:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-23 14:15:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 176. [2021-11-23 14:15:32,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.1885714285714286) internal successors, (208), 175 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:32,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 208 transitions. [2021-11-23 14:15:32,076 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 208 transitions. Word has length 120 [2021-11-23 14:15:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:32,076 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 208 transitions. [2021-11-23 14:15:32,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.3181818181818183) internal successors, (146), 44 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:32,076 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 208 transitions. [2021-11-23 14:15:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 14:15:32,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:32,077 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:32,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 14:15:32,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-23 14:15:32,278 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:32,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:32,278 INFO L85 PathProgramCache]: Analyzing trace with hash -918287018, now seen corresponding path program 10 times [2021-11-23 14:15:32,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:32,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818613055] [2021-11-23 14:15:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:32,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-23 14:15:33,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:33,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818613055] [2021-11-23 14:15:33,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818613055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:15:33,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124649281] [2021-11-23 14:15:33,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:15:33,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:15:33,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:15:33,191 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:15:33,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-23 14:15:33,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:15:33,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:15:33,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-23 14:15:33,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:15:33,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 14:15:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-23 14:15:34,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:15:34,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 14:15:34,711 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 28 treesize of output 24 [2021-11-23 14:15:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-23 14:15:34,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124649281] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:15:34,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:15:34,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 73 [2021-11-23 14:15:34,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414333962] [2021-11-23 14:15:34,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:15:34,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-23 14:15:34,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:34,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-23 14:15:34,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=4926, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 14:15:34,833 INFO L87 Difference]: Start difference. First operand 176 states and 208 transitions. Second operand has 73 states, 73 states have (on average 3.4246575342465753) internal successors, (250), 73 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) [2021-11-23 14:15:37,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:37,973 INFO L93 Difference]: Finished difference Result 288 states and 326 transitions. [2021-11-23 14:15:37,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-23 14:15:37,973 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.4246575342465753) internal successors, (250), 73 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 125 [2021-11-23 14:15:37,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:37,974 INFO L225 Difference]: With dead ends: 288 [2021-11-23 14:15:37,974 INFO L226 Difference]: Without dead ends: 286 [2021-11-23 14:15:37,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4652 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=758, Invalid=12814, Unknown=0, NotChecked=0, Total=13572 [2021-11-23 14:15:37,976 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 291 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 4826 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 5073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 4826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:37,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 1167 Invalid, 5073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 4826 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-23 14:15:37,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-23 14:15:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 195. [2021-11-23 14:15:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.2010309278350515) internal successors, (233), 194 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 233 transitions. [2021-11-23 14:15:38,027 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 233 transitions. Word has length 125 [2021-11-23 14:15:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:38,027 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 233 transitions. [2021-11-23 14:15:38,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.4246575342465753) internal successors, (250), 73 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) [2021-11-23 14:15:38,028 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 233 transitions. [2021-11-23 14:15:38,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 14:15:38,028 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:38,028 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:38,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-23 14:15:38,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-23 14:15:38,229 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:38,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1871343342, now seen corresponding path program 11 times [2021-11-23 14:15:38,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:38,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533856136] [2021-11-23 14:15:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:38,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-23 14:15:39,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:39,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533856136] [2021-11-23 14:15:39,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533856136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:15:39,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612309029] [2021-11-23 14:15:39,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 14:15:39,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:15:39,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:15:39,072 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:15:39,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-23 14:15:39,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-23 14:15:39,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:15:39,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-23 14:15:39,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:15:39,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-23 14:15:40,443 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 25 [2021-11-23 14:15:40,473 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:15:40,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:15:41,056 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 34 treesize of output 28 [2021-11-23 14:15:41,075 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 14:15:41,075 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 36 treesize of output 26 [2021-11-23 14:15:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 704 backedges. 0 proven. 535 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-23 14:15:41,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612309029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:15:41,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:15:41,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 76 [2021-11-23 14:15:41,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677318627] [2021-11-23 14:15:41,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:15:41,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-23 14:15:41,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:41,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-23 14:15:41,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=5357, Unknown=0, NotChecked=0, Total=5700 [2021-11-23 14:15:41,203 INFO L87 Difference]: Start difference. First operand 195 states and 233 transitions. Second operand has 76 states, 76 states have (on average 3.6315789473684212) internal successors, (276), 76 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) [2021-11-23 14:15:46,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:46,119 INFO L93 Difference]: Finished difference Result 345 states and 388 transitions. [2021-11-23 14:15:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-23 14:15:46,120 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.6315789473684212) internal successors, (276), 76 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 125 [2021-11-23 14:15:46,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:46,121 INFO L225 Difference]: With dead ends: 345 [2021-11-23 14:15:46,121 INFO L226 Difference]: Without dead ends: 343 [2021-11-23 14:15:46,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6149 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=997, Invalid=17093, Unknown=0, NotChecked=0, Total=18090 [2021-11-23 14:15:46,123 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 239 mSDsluCounter, 2112 mSDsCounter, 0 mSdLazyCounter, 6215 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 2175 SdHoareTripleChecker+Invalid, 6432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 6215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:46,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 2175 Invalid, 6432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 6215 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 14:15:46,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-23 14:15:46,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 180. [2021-11-23 14:15:46,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.1843575418994414) internal successors, (212), 179 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:15:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 212 transitions. [2021-11-23 14:15:46,200 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 212 transitions. Word has length 125 [2021-11-23 14:15:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:46,200 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 212 transitions. [2021-11-23 14:15:46,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.6315789473684212) internal successors, (276), 76 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) [2021-11-23 14:15:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 212 transitions. [2021-11-23 14:15:46,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-23 14:15:46,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:46,202 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:46,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-23 14:15:46,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-23 14:15:46,419 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:46,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:46,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1277128076, now seen corresponding path program 12 times [2021-11-23 14:15:46,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:46,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339001598] [2021-11-23 14:15:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:46,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 289 proven. 218 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-23 14:15:46,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:46,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339001598] [2021-11-23 14:15:46,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339001598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:15:46,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160585863] [2021-11-23 14:15:46,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 14:15:46,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:15:46,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:15:46,899 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:15:46,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-23 14:15:48,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-23 14:15:48,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:15:48,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 14:15:48,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:15:49,011 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 338 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-23 14:15:49,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:15:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 754 backedges. 338 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2021-11-23 14:15:49,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160585863] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:15:49,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:15:49,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2021-11-23 14:15:49,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646842321] [2021-11-23 14:15:49,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:15:49,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-23 14:15:49,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:49,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-23 14:15:49,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 14:15:49,291 INFO L87 Difference]: Start difference. First operand 180 states and 212 transitions. Second operand has 47 states, 47 states have (on average 3.3191489361702127) internal successors, (156), 47 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) [2021-11-23 14:15:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:15:49,963 INFO L93 Difference]: Finished difference Result 423 states and 497 transitions. [2021-11-23 14:15:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 14:15:49,964 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.3191489361702127) internal successors, (156), 47 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 129 [2021-11-23 14:15:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:15:49,965 INFO L225 Difference]: With dead ends: 423 [2021-11-23 14:15:49,965 INFO L226 Difference]: Without dead ends: 208 [2021-11-23 14:15:49,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 14:15:49,966 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 517 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 14:15:49,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 244 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 14:15:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-23 14:15:50,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 164. [2021-11-23 14:15:50,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.165644171779141) internal successors, (190), 163 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) [2021-11-23 14:15:50,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2021-11-23 14:15:50,010 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 129 [2021-11-23 14:15:50,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:15:50,010 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2021-11-23 14:15:50,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.3191489361702127) internal successors, (156), 47 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) [2021-11-23 14:15:50,011 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2021-11-23 14:15:50,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 14:15:50,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:15:50,011 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:15:50,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-23 14:15:50,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-23 14:15:50,212 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:15:50,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:15:50,212 INFO L85 PathProgramCache]: Analyzing trace with hash -554152064, now seen corresponding path program 25 times [2021-11-23 14:15:50,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:15:50,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746372336] [2021-11-23 14:15:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:15:50,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:15:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:51,222 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 821 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:15:51,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:15:51,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746372336] [2021-11-23 14:15:51,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746372336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:15:51,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579974455] [2021-11-23 14:15:51,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 14:15:51,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:15:51,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:15:51,224 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:15:51,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-23 14:15:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:15:51,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-23 14:15:51,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:15:51,437 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:15:51,456 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:15:51,472 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:15:51,506 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:15:51,525 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:15:51,548 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:15:51,572 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:15:51,593 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:15:51,614 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:15:51,633 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:15:51,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:15:51,676 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:15:51,699 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:15:51,776 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:15:52,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:15:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:15:52,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:15:55,226 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 82 treesize of output 70 [2021-11-23 14:15:55,244 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:15:55,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 189 treesize of output 165 [2021-11-23 14:15:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-23 14:15:55,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579974455] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:15:55,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:15:55,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 34] total 78 [2021-11-23 14:15:55,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890819915] [2021-11-23 14:15:55,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:15:55,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-23 14:15:55,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:15:55,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-23 14:15:55,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=5734, Unknown=0, NotChecked=0, Total=6006 [2021-11-23 14:15:55,304 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand has 78 states, 78 states have (on average 3.6923076923076925) internal successors, (288), 78 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:16:01,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:16:01,263 INFO L93 Difference]: Finished difference Result 272 states and 305 transitions. [2021-11-23 14:16:01,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-23 14:16:01,264 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.6923076923076925) internal successors, (288), 78 states have internal predecessors, (288), 0 states have call successors, (0), 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 134 [2021-11-23 14:16:01,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:16:01,266 INFO L225 Difference]: With dead ends: 272 [2021-11-23 14:16:01,266 INFO L226 Difference]: Without dead ends: 270 [2021-11-23 14:16:01,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 208 SyntacticMatches, 31 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4753 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=823, Invalid=18637, Unknown=0, NotChecked=0, Total=19460 [2021-11-23 14:16:01,269 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 285 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 5873 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1279 SdHoareTripleChecker+Invalid, 6161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 5873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:16:01,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 1279 Invalid, 6161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 5873 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 14:16:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-23 14:16:01,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 168. [2021-11-23 14:16:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1616766467065869) internal successors, (194), 167 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:16:01,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 194 transitions. [2021-11-23 14:16:01,351 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 194 transitions. Word has length 134 [2021-11-23 14:16:01,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:16:01,351 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 194 transitions. [2021-11-23 14:16:01,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.6923076923076925) internal successors, (288), 78 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:16:01,352 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 194 transitions. [2021-11-23 14:16:01,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-23 14:16:01,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:16:01,353 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:16:01,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-23 14:16:01,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-23 14:16:01,567 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:16:01,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:16:01,568 INFO L85 PathProgramCache]: Analyzing trace with hash 204638902, now seen corresponding path program 26 times [2021-11-23 14:16:01,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:16:01,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563760554] [2021-11-23 14:16:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:16:01,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:16:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:16:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 339 proven. 249 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-23 14:16:02,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:16:02,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563760554] [2021-11-23 14:16:02,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563760554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:16:02,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080028651] [2021-11-23 14:16:02,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:16:02,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:16:02,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:16:02,060 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:16:02,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-23 14:16:02,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:16:02,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:16:02,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 14:16:02,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:16:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 392 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-23 14:16:02,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:16:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 392 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2021-11-23 14:16:03,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080028651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:16:03,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:16:03,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2021-11-23 14:16:03,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259818211] [2021-11-23 14:16:03,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:16:03,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 14:16:03,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:16:03,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 14:16:03,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 14:16:03,294 INFO L87 Difference]: Start difference. First operand 168 states and 194 transitions. Second operand has 50 states, 50 states have (on average 3.3) internal successors, (165), 50 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) [2021-11-23 14:16:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:16:04,089 INFO L93 Difference]: Finished difference Result 397 states and 459 transitions. [2021-11-23 14:16:04,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-23 14:16:04,090 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.3) internal successors, (165), 50 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 138 [2021-11-23 14:16:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:16:04,091 INFO L225 Difference]: With dead ends: 397 [2021-11-23 14:16:04,091 INFO L226 Difference]: Without dead ends: 194 [2021-11-23 14:16:04,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 14:16:04,093 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 661 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 14:16:04,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 252 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 14:16:04,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-23 14:16:04,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 176. [2021-11-23 14:16:04,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.1657142857142857) internal successors, (204), 175 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) [2021-11-23 14:16:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 204 transitions. [2021-11-23 14:16:04,149 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 204 transitions. Word has length 138 [2021-11-23 14:16:04,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:16:04,149 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 204 transitions. [2021-11-23 14:16:04,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.3) internal successors, (165), 50 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) [2021-11-23 14:16:04,150 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 204 transitions. [2021-11-23 14:16:04,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 14:16:04,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:16:04,151 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:16:04,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-23 14:16:04,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:16:04,355 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:16:04,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:16:04,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1762263484, now seen corresponding path program 27 times [2021-11-23 14:16:04,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:16:04,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374561703] [2021-11-23 14:16:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:16:04,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:16:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:16:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 947 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:16:05,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:16:05,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374561703] [2021-11-23 14:16:05,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374561703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:16:05,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178624879] [2021-11-23 14:16:05,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:16:05,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:16:05,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:16:05,428 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:16:05,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-23 14:16:06,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-23 14:16:06,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:16:06,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-23 14:16:06,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:16:06,849 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 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-23 14:16:09,070 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-23 14:16:09,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 42 [2021-11-23 14:16:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 407 proven. 344 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-23 14:16:09,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:16:11,620 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 44 treesize of output 38 [2021-11-23 14:16:11,629 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-23 14:16:11,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 41 [2021-11-23 14:16:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 364 proven. 358 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-23 14:16:13,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178624879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:16:13,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:16:13,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 39, 37] total 107 [2021-11-23 14:16:13,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181298268] [2021-11-23 14:16:13,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:16:13,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-23 14:16:13,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:16:13,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-23 14:16:13,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=9962, Unknown=0, NotChecked=0, Total=11342 [2021-11-23 14:16:13,174 INFO L87 Difference]: Start difference. First operand 176 states and 204 transitions. Second operand has 107 states, 107 states have (on average 3.364485981308411) internal successors, (360), 107 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:16:21,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:16:21,610 INFO L93 Difference]: Finished difference Result 293 states and 325 transitions. [2021-11-23 14:16:21,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-11-23 14:16:21,611 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.364485981308411) internal successors, (360), 107 states have internal predecessors, (360), 0 states have call successors, (0), 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 143 [2021-11-23 14:16:21,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:16:21,613 INFO L225 Difference]: With dead ends: 293 [2021-11-23 14:16:21,613 INFO L226 Difference]: Without dead ends: 229 [2021-11-23 14:16:21,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 221 SyntacticMatches, 16 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13911 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=4739, Invalid=49783, Unknown=0, NotChecked=0, Total=54522 [2021-11-23 14:16:21,616 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 203 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 2544 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 3505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 803 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 14:16:21,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 1022 Invalid, 3505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2544 Invalid, 0 Unknown, 803 Unchecked, 1.3s Time] [2021-11-23 14:16:21,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-23 14:16:21,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 182. [2021-11-23 14:16:21,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.171270718232044) internal successors, (212), 181 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:16:21,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 212 transitions. [2021-11-23 14:16:21,683 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 212 transitions. Word has length 143 [2021-11-23 14:16:21,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:16:21,683 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 212 transitions. [2021-11-23 14:16:21,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.364485981308411) internal successors, (360), 107 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:16:21,684 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 212 transitions. [2021-11-23 14:16:21,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 14:16:21,684 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:16:21,684 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:16:21,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-23 14:16:21,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-23 14:16:21,895 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:16:21,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:16:21,896 INFO L85 PathProgramCache]: Analyzing trace with hash 2115307206, now seen corresponding path program 13 times [2021-11-23 14:16:21,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:16:21,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338366789] [2021-11-23 14:16:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:16:21,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:16:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:16:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 947 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:16:23,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:16:23,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338366789] [2021-11-23 14:16:23,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338366789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:16:23,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582853509] [2021-11-23 14:16:23,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 14:16:23,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:16:23,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:16:23,644 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:16:23,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-23 14:16:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:16:23,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-23 14:16:23,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:16:23,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-23 14:16:25,091 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-23 14:16:25,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:16:26,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 14:16:26,235 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 28 treesize of output 24 [2021-11-23 14:16:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 0 proven. 722 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-23 14:16:26,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582853509] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:16:26,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:16:26,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 34, 34] total 84 [2021-11-23 14:16:26,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955396712] [2021-11-23 14:16:26,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:16:26,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-23 14:16:26,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:16:26,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-23 14:16:26,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=6557, Unknown=0, NotChecked=0, Total=6972 [2021-11-23 14:16:26,482 INFO L87 Difference]: Start difference. First operand 182 states and 212 transitions. Second operand has 84 states, 84 states have (on average 3.6904761904761907) internal successors, (310), 84 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) [2021-11-23 14:16:34,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:16:34,648 INFO L93 Difference]: Finished difference Result 295 states and 329 transitions. [2021-11-23 14:16:34,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-23 14:16:34,648 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.6904761904761907) internal successors, (310), 84 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 143 [2021-11-23 14:16:34,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:16:34,650 INFO L225 Difference]: With dead ends: 295 [2021-11-23 14:16:34,650 INFO L226 Difference]: Without dead ends: 293 [2021-11-23 14:16:34,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 251 SyntacticMatches, 5 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7555 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2147, Invalid=29715, Unknown=0, NotChecked=0, Total=31862 [2021-11-23 14:16:34,652 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 618 mSDsluCounter, 1523 mSDsCounter, 0 mSdLazyCounter, 6681 mSolverCounterSat, 513 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1563 SdHoareTripleChecker+Invalid, 7194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 513 IncrementalHoareTripleChecker+Valid, 6681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 14:16:34,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 1563 Invalid, 7194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [513 Valid, 6681 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-23 14:16:34,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-23 14:16:34,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 195. [2021-11-23 14:16:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.1804123711340206) internal successors, (229), 194 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:16:34,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 229 transitions. [2021-11-23 14:16:34,716 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 229 transitions. Word has length 143 [2021-11-23 14:16:34,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:16:34,716 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 229 transitions. [2021-11-23 14:16:34,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.6904761904761907) internal successors, (310), 84 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) [2021-11-23 14:16:34,717 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 229 transitions. [2021-11-23 14:16:34,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 14:16:34,718 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:16:34,718 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:16:34,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-23 14:16:34,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:16:34,923 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:16:34,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:16:34,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1362138956, now seen corresponding path program 28 times [2021-11-23 14:16:34,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:16:34,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124868847] [2021-11-23 14:16:34,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:16:34,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:16:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:16:35,490 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 333 proven. 268 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-23 14:16:35,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:16:35,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124868847] [2021-11-23 14:16:35,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124868847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:16:35,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001956225] [2021-11-23 14:16:35,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:16:35,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:16:35,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:16:35,498 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:16:35,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-23 14:16:35,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:16:35,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:16:35,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 14:16:35,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:16:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 376 proven. 225 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-23 14:16:36,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:16:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 376 proven. 225 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-23 14:16:36,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001956225] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:16:36,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:16:36,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2021-11-23 14:16:36,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775208266] [2021-11-23 14:16:36,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:16:36,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 14:16:36,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:16:36,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 14:16:36,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 14:16:36,737 INFO L87 Difference]: Start difference. First operand 195 states and 229 transitions. Second operand has 53 states, 53 states have (on average 2.7735849056603774) internal successors, (147), 53 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:16:37,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:16:37,671 INFO L93 Difference]: Finished difference Result 510 states and 584 transitions. [2021-11-23 14:16:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-23 14:16:37,671 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.7735849056603774) internal successors, (147), 53 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 146 [2021-11-23 14:16:37,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:16:37,673 INFO L225 Difference]: With dead ends: 510 [2021-11-23 14:16:37,673 INFO L226 Difference]: Without dead ends: 282 [2021-11-23 14:16:37,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2021-11-23 14:16:37,674 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 942 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 14:16:37,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [942 Valid, 287 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 14:16:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-23 14:16:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 199. [2021-11-23 14:16:37,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.1767676767676767) internal successors, (233), 198 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:16:37,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 233 transitions. [2021-11-23 14:16:37,755 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 233 transitions. Word has length 146 [2021-11-23 14:16:37,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:16:37,755 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 233 transitions. [2021-11-23 14:16:37,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.7735849056603774) internal successors, (147), 53 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:16:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 233 transitions. [2021-11-23 14:16:37,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-23 14:16:37,756 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:16:37,757 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:16:37,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-23 14:16:37,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-23 14:16:37,957 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:16:37,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:16:37,958 INFO L85 PathProgramCache]: Analyzing trace with hash 969790130, now seen corresponding path program 29 times [2021-11-23 14:16:37,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:16:37,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517897776] [2021-11-23 14:16:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:16:37,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:16:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:16:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:16:40,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:16:40,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517897776] [2021-11-23 14:16:40,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517897776] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:16:40,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133891582] [2021-11-23 14:16:40,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 14:16:40,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:16:40,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:16:40,462 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:16:40,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-23 14:16:40,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-23 14:16:40,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:16:40,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-23 14:16:40,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:16:41,127 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:16:41,147 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:16:41,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:16:41,198 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:16:41,228 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:16:41,253 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:16:41,274 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:16:41,290 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:16:41,368 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:16:41,442 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 14:16:41,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 26 [2021-11-23 14:16:42,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:16:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1018 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 14:16:42,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:16:45,324 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 82 treesize of output 70 [2021-11-23 14:16:45,337 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:16:45,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 189 treesize of output 165 [2021-11-23 14:16:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 766 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked. [2021-11-23 14:16:45,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133891582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:16:45,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:16:45,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 35, 36] total 98 [2021-11-23 14:16:45,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437343169] [2021-11-23 14:16:45,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:16:45,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-23 14:16:45,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:16:45,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-23 14:16:45,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=509, Invalid=8997, Unknown=0, NotChecked=0, Total=9506 [2021-11-23 14:16:45,503 INFO L87 Difference]: Start difference. First operand 199 states and 233 transitions. Second operand has 98 states, 98 states have (on average 3.510204081632653) internal successors, (344), 98 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:16:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:16:58,052 INFO L93 Difference]: Finished difference Result 298 states and 332 transitions. [2021-11-23 14:16:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-11-23 14:16:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.510204081632653) internal successors, (344), 98 states have internal predecessors, (344), 0 states have call successors, (0), 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 [2021-11-23 14:16:58,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:16:58,054 INFO L225 Difference]: With dead ends: 298 [2021-11-23 14:16:58,054 INFO L226 Difference]: Without dead ends: 296 [2021-11-23 14:16:58,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 240 SyntacticMatches, 15 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12055 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=2755, Invalid=44551, Unknown=0, NotChecked=0, Total=47306 [2021-11-23 14:16:58,057 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 582 mSDsluCounter, 1789 mSDsCounter, 0 mSdLazyCounter, 8051 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1829 SdHoareTripleChecker+Invalid, 8604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 8051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-23 14:16:58,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 1829 Invalid, 8604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 8051 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-23 14:16:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-11-23 14:16:58,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 188. [2021-11-23 14:16:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 187 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) [2021-11-23 14:16:58,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 218 transitions. [2021-11-23 14:16:58,155 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 218 transitions. Word has length 148 [2021-11-23 14:16:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:16:58,156 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 218 transitions. [2021-11-23 14:16:58,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.510204081632653) internal successors, (344), 98 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:16:58,157 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 218 transitions. [2021-11-23 14:16:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 14:16:58,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:16:58,158 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:16:58,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-23 14:16:58,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-23 14:16:58,371 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:16:58,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:16:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash 760161512, now seen corresponding path program 30 times [2021-11-23 14:16:58,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:16:58,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766374166] [2021-11-23 14:16:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:16:58,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:16:58,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:00,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 1082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:00,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:00,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766374166] [2021-11-23 14:17:00,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766374166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:00,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284296073] [2021-11-23 14:17:00,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 14:17:00,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:00,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:00,897 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:00,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-23 14:17:01,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-11-23 14:17:01,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:17:01,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-23 14:17:01,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:01,924 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 15 treesize of output 11 [2021-11-23 14:17:02,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:02,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:02,250 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:02,310 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:02,368 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:02,429 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:02,492 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:02,550 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:02,612 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:02,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:02,737 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:02,801 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:02,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:02,948 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:03,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:17:03,147 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 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-23 14:17:05,817 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-23 14:17:05,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 42 [2021-11-23 14:17:05,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 466 proven. 391 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-11-23 14:17:05,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:17:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 420 proven. 406 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-23 14:17:28,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284296073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:17:28,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:17:28,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 41, 39] total 132 [2021-11-23 14:17:28,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568333129] [2021-11-23 14:17:28,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:17:28,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2021-11-23 14:17:28,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:28,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-11-23 14:17:28,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=15077, Unknown=0, NotChecked=0, Total=17292 [2021-11-23 14:17:28,563 INFO L87 Difference]: Start difference. First operand 188 states and 218 transitions. Second operand has 132 states, 132 states have (on average 2.909090909090909) internal successors, (384), 132 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:17:50,177 INFO L93 Difference]: Finished difference Result 730 states and 851 transitions. [2021-11-23 14:17:50,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2021-11-23 14:17:50,178 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.909090909090909) internal successors, (384), 132 states have internal predecessors, (384), 0 states have call successors, (0), 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 152 [2021-11-23 14:17:50,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:17:50,180 INFO L225 Difference]: With dead ends: 730 [2021-11-23 14:17:50,180 INFO L226 Difference]: Without dead ends: 535 [2021-11-23 14:17:50,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 264 SyntacticMatches, 16 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32984 ImplicationChecksByTransitivity, 44.6s TimeCoverageRelationStatistics Valid=11181, Invalid=98711, Unknown=0, NotChecked=0, Total=109892 [2021-11-23 14:17:50,185 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 313 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1926 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:17:50,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 1424 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1305 Invalid, 0 Unknown, 1926 Unchecked, 0.8s Time] [2021-11-23 14:17:50,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-11-23 14:17:50,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 257. [2021-11-23 14:17:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.2109375) internal successors, (310), 256 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) [2021-11-23 14:17:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 310 transitions. [2021-11-23 14:17:50,293 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 310 transitions. Word has length 152 [2021-11-23 14:17:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:17:50,293 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 310 transitions. [2021-11-23 14:17:50,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.909090909090909) internal successors, (384), 132 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:17:50,293 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 310 transitions. [2021-11-23 14:17:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 14:17:50,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:17:50,295 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:17:50,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-23 14:17:50,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:50,511 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:17:50,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:17:50,512 INFO L85 PathProgramCache]: Analyzing trace with hash -455992214, now seen corresponding path program 14 times [2021-11-23 14:17:50,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:17:50,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494695469] [2021-11-23 14:17:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:17:50,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:17:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:17:52,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 1082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:17:52,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:17:52,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494695469] [2021-11-23 14:17:52,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494695469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:17:52,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858813330] [2021-11-23 14:17:52,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:17:52,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:17:52,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:17:52,714 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:17:52,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-23 14:17:52,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:17:52,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:17:52,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-23 14:17:52,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:17:53,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-23 14:17:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-23 14:17:54,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:17:55,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-11-23 14:17:55,637 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 28 treesize of output 24 [2021-11-23 14:17:55,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-11-23 14:17:55,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858813330] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:17:55,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:17:55,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 36, 36] total 89 [2021-11-23 14:17:55,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300804230] [2021-11-23 14:17:55,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:17:55,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-23 14:17:55,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:17:55,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-23 14:17:55,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=7383, Unknown=0, NotChecked=0, Total=7832 [2021-11-23 14:17:55,904 INFO L87 Difference]: Start difference. First operand 257 states and 310 transitions. Second operand has 89 states, 89 states have (on average 3.707865168539326) internal successors, (330), 89 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:05,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:18:05,253 INFO L93 Difference]: Finished difference Result 389 states and 449 transitions. [2021-11-23 14:18:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-23 14:18:05,254 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.707865168539326) internal successors, (330), 89 states have internal predecessors, (330), 0 states have call successors, (0), 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 152 [2021-11-23 14:18:05,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:18:05,256 INFO L225 Difference]: With dead ends: 389 [2021-11-23 14:18:05,256 INFO L226 Difference]: Without dead ends: 387 [2021-11-23 14:18:05,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 267 SyntacticMatches, 5 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8516 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=2333, Invalid=33577, Unknown=0, NotChecked=0, Total=35910 [2021-11-23 14:18:05,258 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 628 mSDsluCounter, 1689 mSDsCounter, 0 mSdLazyCounter, 7374 mSolverCounterSat, 518 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 7892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 518 IncrementalHoareTripleChecker+Valid, 7374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:18:05,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 1731 Invalid, 7892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [518 Valid, 7374 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-11-23 14:18:05,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-23 14:18:05,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 279. [2021-11-23 14:18:05,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.2194244604316546) internal successors, (339), 278 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:05,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 339 transitions. [2021-11-23 14:18:05,362 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 339 transitions. Word has length 152 [2021-11-23 14:18:05,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:18:05,362 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 339 transitions. [2021-11-23 14:18:05,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.707865168539326) internal successors, (330), 89 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:05,363 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 339 transitions. [2021-11-23 14:18:05,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-23 14:18:05,364 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:18:05,364 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:18:05,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-23 14:18:05,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-23 14:18:05,565 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:18:05,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:18:05,566 INFO L85 PathProgramCache]: Analyzing trace with hash 591282404, now seen corresponding path program 15 times [2021-11-23 14:18:05,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:18:05,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021214091] [2021-11-23 14:18:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:18:05,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:18:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:18:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 1082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:18:07,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:18:07,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021214091] [2021-11-23 14:18:07,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021214091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:18:07,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134875300] [2021-11-23 14:18:07,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:18:07,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:18:07,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:18:07,923 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:18:07,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-23 14:18:09,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-11-23 14:18:09,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:18:09,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-23 14:18:09,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:18:09,562 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 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-23 14:18:12,329 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-11-23 14:18:12,329 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 53 treesize of output 42 [2021-11-23 14:18:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 46 proven. 706 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 14:18:12,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:18:14,156 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 44 treesize of output 38 [2021-11-23 14:18:14,160 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 14:18:14,161 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 55 treesize of output 39 [2021-11-23 14:18:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-11-23 14:18:14,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134875300] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:18:14,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:18:14,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 42, 42] total 102 [2021-11-23 14:18:14,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203313478] [2021-11-23 14:18:14,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:18:14,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-23 14:18:14,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:18:14,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-23 14:18:14,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=966, Invalid=9336, Unknown=0, NotChecked=0, Total=10302 [2021-11-23 14:18:14,694 INFO L87 Difference]: Start difference. First operand 279 states and 339 transitions. Second operand has 102 states, 102 states have (on average 2.892156862745098) internal successors, (295), 102 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:37,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:18:37,254 INFO L93 Difference]: Finished difference Result 1141 states and 1346 transitions. [2021-11-23 14:18:37,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2021-11-23 14:18:37,255 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.892156862745098) internal successors, (295), 102 states have internal predecessors, (295), 0 states have call successors, (0), 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 152 [2021-11-23 14:18:37,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:18:37,260 INFO L225 Difference]: With dead ends: 1141 [2021-11-23 14:18:37,260 INFO L226 Difference]: Without dead ends: 1139 [2021-11-23 14:18:37,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 622 GetRequests, 283 SyntacticMatches, 9 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35258 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=8616, Invalid=101273, Unknown=3, NotChecked=0, Total=109892 [2021-11-23 14:18:37,267 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 461 mSDsluCounter, 3595 mSDsCounter, 0 mSdLazyCounter, 4728 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 3669 SdHoareTripleChecker+Invalid, 7116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 4728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2070 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:18:37,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 3669 Invalid, 7116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 4728 Invalid, 0 Unknown, 2070 Unchecked, 2.7s Time] [2021-11-23 14:18:37,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-11-23 14:18:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 477. [2021-11-23 14:18:37,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 1.2668067226890756) internal successors, (603), 476 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 603 transitions. [2021-11-23 14:18:37,538 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 603 transitions. Word has length 152 [2021-11-23 14:18:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:18:37,538 INFO L470 AbstractCegarLoop]: Abstraction has 477 states and 603 transitions. [2021-11-23 14:18:37,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.892156862745098) internal successors, (295), 102 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:37,539 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 603 transitions. [2021-11-23 14:18:37,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 14:18:37,541 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:18:37,541 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 15, 15, 15, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:18:37,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-23 14:18:37,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-23 14:18:37,755 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:18:37,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:18:37,755 INFO L85 PathProgramCache]: Analyzing trace with hash -19939034, now seen corresponding path program 16 times [2021-11-23 14:18:37,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:18:37,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123397977] [2021-11-23 14:18:37,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:18:37,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:18:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:18:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 225 proven. 440 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-11-23 14:18:38,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:18:38,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123397977] [2021-11-23 14:18:38,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123397977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:18:38,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184822943] [2021-11-23 14:18:38,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:18:38,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:18:38,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:18:38,400 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:18:38,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-23 14:18:38,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:18:38,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:18:38,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-23 14:18:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:18:39,159 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:18:39,259 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 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-23 14:18:40,367 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 25 [2021-11-23 14:18:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-23 14:18:40,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:18:41,650 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 82 treesize of output 70 [2021-11-23 14:18:41,664 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:18:41,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 290 treesize of output 242 [2021-11-23 14:18:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 0 proven. 826 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-23 14:18:41,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184822943] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:18:41,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:18:41,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 38] total 91 [2021-11-23 14:18:41,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276823290] [2021-11-23 14:18:41,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:18:41,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-23 14:18:41,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:18:41,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-23 14:18:41,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=7426, Unknown=0, NotChecked=0, Total=8190 [2021-11-23 14:18:41,861 INFO L87 Difference]: Start difference. First operand 477 states and 603 transitions. Second operand has 91 states, 91 states have (on average 3.098901098901099) internal successors, (282), 91 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:54,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:18:54,902 INFO L93 Difference]: Finished difference Result 913 states and 1053 transitions. [2021-11-23 14:18:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-11-23 14:18:54,903 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.098901098901099) internal successors, (282), 91 states have internal predecessors, (282), 0 states have call successors, (0), 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 [2021-11-23 14:18:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:18:54,907 INFO L225 Difference]: With dead ends: 913 [2021-11-23 14:18:54,907 INFO L226 Difference]: Without dead ends: 843 [2021-11-23 14:18:54,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 267 SyntacticMatches, 2 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20519 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=4073, Invalid=59179, Unknown=0, NotChecked=0, Total=63252 [2021-11-23 14:18:54,912 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 871 mSDsluCounter, 4015 mSDsCounter, 0 mSdLazyCounter, 12904 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 4126 SdHoareTripleChecker+Invalid, 13294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 12904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-23 14:18:54,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 4126 Invalid, 13294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 12904 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-11-23 14:18:54,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-11-23 14:18:55,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 323. [2021-11-23 14:18:55,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.2329192546583851) internal successors, (397), 322 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 397 transitions. [2021-11-23 14:18:55,071 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 397 transitions. Word has length 154 [2021-11-23 14:18:55,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:18:55,071 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 397 transitions. [2021-11-23 14:18:55,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.098901098901099) internal successors, (282), 91 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:55,072 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 397 transitions. [2021-11-23 14:18:55,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 14:18:55,073 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:18:55,073 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:18:55,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-23 14:18:55,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-23 14:18:55,287 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:18:55,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:18:55,288 INFO L85 PathProgramCache]: Analyzing trace with hash -987245920, now seen corresponding path program 17 times [2021-11-23 14:18:55,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:18:55,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951170207] [2021-11-23 14:18:55,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:18:55,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:18:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:18:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 451 proven. 317 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-23 14:18:55,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:18:55,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951170207] [2021-11-23 14:18:55,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951170207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:18:55,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497199824] [2021-11-23 14:18:55,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 14:18:55,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:18:55,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:18:55,951 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:18:55,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-23 14:18:56,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-23 14:18:56,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:18:56,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-23 14:18:56,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:18:57,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 512 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-23 14:18:57,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:18:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 512 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-11-23 14:18:57,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497199824] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:18:57,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:18:57,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2021-11-23 14:18:57,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048264722] [2021-11-23 14:18:57,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:18:57,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-23 14:18:57,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:18:57,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-23 14:18:57,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 14:18:57,865 INFO L87 Difference]: Start difference. First operand 323 states and 397 transitions. Second operand has 56 states, 56 states have (on average 3.3214285714285716) internal successors, (186), 56 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:58,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:18:58,960 INFO L93 Difference]: Finished difference Result 572 states and 680 transitions. [2021-11-23 14:18:58,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 14:18:58,961 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.3214285714285716) internal successors, (186), 56 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-11-23 14:18:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:18:58,962 INFO L225 Difference]: With dead ends: 572 [2021-11-23 14:18:58,962 INFO L226 Difference]: Without dead ends: 266 [2021-11-23 14:18:58,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1317 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 14:18:58,964 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 767 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 767 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 14:18:58,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [767 Valid, 314 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 14:18:58,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-23 14:18:59,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 248. [2021-11-23 14:18:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1983805668016194) internal successors, (296), 247 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:59,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 296 transitions. [2021-11-23 14:18:59,098 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 296 transitions. Word has length 156 [2021-11-23 14:18:59,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:18:59,098 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 296 transitions. [2021-11-23 14:18:59,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.3214285714285716) internal successors, (186), 56 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:18:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 296 transitions. [2021-11-23 14:18:59,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-23 14:18:59,100 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:18:59,100 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:18:59,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-23 14:18:59,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-23 14:18:59,303 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:18:59,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:18:59,303 INFO L85 PathProgramCache]: Analyzing trace with hash 709837878, now seen corresponding path program 18 times [2021-11-23 14:18:59,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:18:59,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265277043] [2021-11-23 14:18:59,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:18:59,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:18:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:19:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 0 proven. 1226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:19:00,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:19:00,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265277043] [2021-11-23 14:19:00,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265277043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:19:00,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30722691] [2021-11-23 14:19:00,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 14:19:00,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:19:00,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:19:00,655 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:19:00,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-23 14:19:04,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-11-23 14:19:04,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:19:04,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 14:19:04,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:19:05,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 14:19:07,837 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-23 14:19:07,837 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 76 treesize of output 39 [2021-11-23 14:19:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 496 proven. 441 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-23 14:19:07,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:19:10,744 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 30 treesize of output 28 [2021-11-23 14:19:10,752 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 45 treesize of output 39 [2021-11-23 14:19:10,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 480 proven. 457 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-23 14:19:10,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30722691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:19:10,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:19:10,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 97 [2021-11-23 14:19:10,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079884660] [2021-11-23 14:19:10,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:19:10,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-23 14:19:10,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:19:10,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-23 14:19:10,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1069, Invalid=8243, Unknown=0, NotChecked=0, Total=9312 [2021-11-23 14:19:10,911 INFO L87 Difference]: Start difference. First operand 248 states and 296 transitions. Second operand has 97 states, 97 states have (on average 3.6391752577319587) internal successors, (353), 97 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:19:15,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:19:15,873 INFO L93 Difference]: Finished difference Result 385 states and 440 transitions. [2021-11-23 14:19:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-23 14:19:15,874 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.6391752577319587) internal successors, (353), 97 states have internal predecessors, (353), 0 states have call successors, (0), 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 161 [2021-11-23 14:19:15,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:19:15,876 INFO L225 Difference]: With dead ends: 385 [2021-11-23 14:19:15,877 INFO L226 Difference]: Without dead ends: 313 [2021-11-23 14:19:15,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 300 SyntacticMatches, 17 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3939 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2113, Invalid=19939, Unknown=0, NotChecked=0, Total=22052 [2021-11-23 14:19:15,878 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 217 mSDsluCounter, 1150 mSDsCounter, 0 mSdLazyCounter, 3778 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 4679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 3778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 829 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:19:15,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 1192 Invalid, 4679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 3778 Invalid, 0 Unknown, 829 Unchecked, 1.8s Time] [2021-11-23 14:19:15,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-23 14:19:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 251. [2021-11-23 14:19:15,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.2) internal successors, (300), 250 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:19:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 300 transitions. [2021-11-23 14:19:15,990 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 300 transitions. Word has length 161 [2021-11-23 14:19:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:19:15,990 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 300 transitions. [2021-11-23 14:19:15,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.6391752577319587) internal successors, (353), 97 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:19:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 300 transitions. [2021-11-23 14:19:15,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-23 14:19:15,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:19:15,992 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:19:16,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-23 14:19:16,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-23 14:19:16,192 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:19:16,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:19:16,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1730555918, now seen corresponding path program 19 times [2021-11-23 14:19:16,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:19:16,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804663743] [2021-11-23 14:19:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:19:16,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:19:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:19:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 0 proven. 1226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:19:18,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:19:18,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804663743] [2021-11-23 14:19:18,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804663743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:19:18,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744715767] [2021-11-23 14:19:18,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 14:19:18,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:19:18,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:19:18,723 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:19:18,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-23 14:19:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:19:18,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-23 14:19:18,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:19:19,285 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:19:20,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:19:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:19:20,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:19:22,466 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 34 treesize of output 28 [2021-11-23 14:19:22,472 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 14:19:22,472 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 36 treesize of output 26 [2021-11-23 14:19:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 0 proven. 937 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-23 14:19:22,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744715767] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:19:22,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:19:22,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 39, 39] total 97 [2021-11-23 14:19:22,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513216595] [2021-11-23 14:19:22,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:19:22,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-23 14:19:22,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:19:22,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-23 14:19:22,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=8802, Unknown=0, NotChecked=0, Total=9312 [2021-11-23 14:19:22,764 INFO L87 Difference]: Start difference. First operand 251 states and 300 transitions. Second operand has 97 states, 97 states have (on average 3.6288659793814433) internal successors, (352), 97 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:19:36,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:19:36,810 INFO L93 Difference]: Finished difference Result 376 states and 431 transitions. [2021-11-23 14:19:36,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-11-23 14:19:36,811 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.6288659793814433) internal successors, (352), 97 states have internal predecessors, (352), 0 states have call successors, (0), 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 161 [2021-11-23 14:19:36,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:19:36,813 INFO L225 Difference]: With dead ends: 376 [2021-11-23 14:19:36,813 INFO L226 Difference]: Without dead ends: 374 [2021-11-23 14:19:36,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 279 SyntacticMatches, 6 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12683 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=3229, Invalid=47171, Unknown=0, NotChecked=0, Total=50400 [2021-11-23 14:19:36,817 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 670 mSDsluCounter, 1976 mSDsCounter, 0 mSdLazyCounter, 9108 mSolverCounterSat, 553 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 9661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 553 IncrementalHoareTripleChecker+Valid, 9108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:19:36,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 2018 Invalid, 9661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [553 Valid, 9108 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-23 14:19:36,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-11-23 14:19:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 255. [2021-11-23 14:19:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.1968503937007875) internal successors, (304), 254 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:19:36,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 304 transitions. [2021-11-23 14:19:36,939 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 304 transitions. Word has length 161 [2021-11-23 14:19:36,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:19:36,939 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 304 transitions. [2021-11-23 14:19:36,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.6288659793814433) internal successors, (352), 97 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:19:36,940 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 304 transitions. [2021-11-23 14:19:36,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-11-23 14:19:36,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:19:36,941 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:19:36,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-23 14:19:37,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:19:37,155 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:19:37,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:19:37,155 INFO L85 PathProgramCache]: Analyzing trace with hash -6651352, now seen corresponding path program 20 times [2021-11-23 14:19:37,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:19:37,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262411375] [2021-11-23 14:19:37,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:19:37,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:19:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:19:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 513 proven. 354 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-23 14:19:37,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:19:37,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262411375] [2021-11-23 14:19:37,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262411375] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:19:37,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517472977] [2021-11-23 14:19:37,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:19:37,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:19:37,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:19:37,831 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:19:37,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-23 14:19:37,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:19:37,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:19:37,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 14:19:37,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:19:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 578 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-23 14:19:39,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:19:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 578 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2021-11-23 14:19:39,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517472977] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:19:39,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:19:39,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2021-11-23 14:19:39,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869823503] [2021-11-23 14:19:39,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:19:39,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-23 14:19:39,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:19:39,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-23 14:19:39,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=2619, Unknown=0, NotChecked=0, Total=3422 [2021-11-23 14:19:39,506 INFO L87 Difference]: Start difference. First operand 255 states and 304 transitions. Second operand has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 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) [2021-11-23 14:19:40,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:19:40,730 INFO L93 Difference]: Finished difference Result 575 states and 681 transitions. [2021-11-23 14:19:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-23 14:19:40,731 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 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) Word has length 165 [2021-11-23 14:19:40,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:19:40,733 INFO L225 Difference]: With dead ends: 575 [2021-11-23 14:19:40,733 INFO L226 Difference]: Without dead ends: 280 [2021-11-23 14:19:40,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1370, Invalid=4482, Unknown=0, NotChecked=0, Total=5852 [2021-11-23 14:19:40,734 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 812 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:19:40,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 367 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 14:19:40,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-23 14:19:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 212. [2021-11-23 14:19:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.1658767772511849) internal successors, (246), 211 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:19:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 246 transitions. [2021-11-23 14:19:40,859 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 246 transitions. Word has length 165 [2021-11-23 14:19:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:19:40,859 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 246 transitions. [2021-11-23 14:19:40,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.3220338983050848) internal successors, (196), 59 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) [2021-11-23 14:19:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 246 transitions. [2021-11-23 14:19:40,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-23 14:19:40,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:19:40,861 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:19:40,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-23 14:19:41,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:19:41,075 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:19:41,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:19:41,076 INFO L85 PathProgramCache]: Analyzing trace with hash -6275504, now seen corresponding path program 31 times [2021-11-23 14:19:41,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:19:41,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861591051] [2021-11-23 14:19:41,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:19:41,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:19:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:19:42,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1379 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:19:42,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:19:42,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861591051] [2021-11-23 14:19:42,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861591051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:19:42,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168583012] [2021-11-23 14:19:42,880 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 14:19:42,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:19:42,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:19:42,882 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:19:42,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-23 14:19:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:19:43,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-23 14:19:43,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:19:43,180 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,197 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,239 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,256 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,275 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,299 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,321 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,340 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,379 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,397 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,417 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,436 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,454 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,473 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,492 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:19:43,570 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:19:44,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:19:44,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:19:44,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:19:49,430 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 82 treesize of output 70 [2021-11-23 14:19:49,444 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:19:49,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 290 treesize of output 242 [2021-11-23 14:19:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 1055 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-23 14:19:49,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168583012] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:19:49,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:19:49,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 42] total 98 [2021-11-23 14:19:49,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673349730] [2021-11-23 14:19:49,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:19:49,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-23 14:19:49,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:19:49,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-23 14:19:49,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=9162, Unknown=0, NotChecked=0, Total=9506 [2021-11-23 14:19:49,519 INFO L87 Difference]: Start difference. First operand 212 states and 246 transitions. Second operand has 98 states, 98 states have (on average 3.7551020408163267) internal successors, (368), 98 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:19:59,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:19:59,147 INFO L93 Difference]: Finished difference Result 344 states and 385 transitions. [2021-11-23 14:19:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-23 14:19:59,148 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.7551020408163267) internal successors, (368), 98 states have internal predecessors, (368), 0 states have call successors, (0), 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 170 [2021-11-23 14:19:59,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:19:59,149 INFO L225 Difference]: With dead ends: 344 [2021-11-23 14:19:59,149 INFO L226 Difference]: Without dead ends: 342 [2021-11-23 14:19:59,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 264 SyntacticMatches, 39 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7477 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1035, Invalid=29765, Unknown=0, NotChecked=0, Total=30800 [2021-11-23 14:19:59,152 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 308 mSDsluCounter, 1904 mSDsCounter, 0 mSdLazyCounter, 8770 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 9085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 8770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:19:59,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 1949 Invalid, 9085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 8770 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-23 14:19:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-11-23 14:19:59,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 216. [2021-11-23 14:19:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.1627906976744187) internal successors, (250), 215 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) [2021-11-23 14:19:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 250 transitions. [2021-11-23 14:19:59,275 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 250 transitions. Word has length 170 [2021-11-23 14:19:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:19:59,275 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 250 transitions. [2021-11-23 14:19:59,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.7551020408163267) internal successors, (368), 98 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:19:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 250 transitions. [2021-11-23 14:19:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-23 14:19:59,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:19:59,276 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:19:59,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-23 14:19:59,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:19:59,477 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:19:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:19:59,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1499033210, now seen corresponding path program 32 times [2021-11-23 14:19:59,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:19:59,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727402862] [2021-11-23 14:19:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:19:59,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:19:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:20:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 579 proven. 393 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-23 14:20:00,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:20:00,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727402862] [2021-11-23 14:20:00,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727402862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:20:00,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790305734] [2021-11-23 14:20:00,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:20:00,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:20:00,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:20:00,260 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:20:00,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-23 14:20:00,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:20:00,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:20:00,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-23 14:20:00,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:20:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 648 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-23 14:20:01,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:20:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 648 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2021-11-23 14:20:02,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790305734] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:20:02,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:20:02,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2021-11-23 14:20:02,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864278974] [2021-11-23 14:20:02,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:20:02,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-23 14:20:02,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:20:02,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-23 14:20:02,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=2897, Unknown=0, NotChecked=0, Total=3782 [2021-11-23 14:20:02,067 INFO L87 Difference]: Start difference. First operand 216 states and 250 transitions. Second operand has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:20:03,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:20:03,206 INFO L93 Difference]: Finished difference Result 501 states and 579 transitions. [2021-11-23 14:20:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 14:20:03,206 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 0 states have call successors, (0), 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 174 [2021-11-23 14:20:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:20:03,208 INFO L225 Difference]: With dead ends: 501 [2021-11-23 14:20:03,208 INFO L226 Difference]: Without dead ends: 242 [2021-11-23 14:20:03,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1512, Invalid=4968, Unknown=0, NotChecked=0, Total=6480 [2021-11-23 14:20:03,210 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 899 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 14:20:03,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [899 Valid, 304 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 14:20:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-23 14:20:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 224. [2021-11-23 14:20:03,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.1659192825112108) internal successors, (260), 223 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:20:03,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 260 transitions. [2021-11-23 14:20:03,371 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 260 transitions. Word has length 174 [2021-11-23 14:20:03,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:20:03,371 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 260 transitions. [2021-11-23 14:20:03,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.306451612903226) internal successors, (205), 62 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:20:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 260 transitions. [2021-11-23 14:20:03,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-23 14:20:03,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:20:03,373 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:20:03,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-23 14:20:03,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:20:03,592 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:20:03,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:20:03,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1183138084, now seen corresponding path program 33 times [2021-11-23 14:20:03,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:20:03,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443569469] [2021-11-23 14:20:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:20:03,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:20:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:20:05,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 1541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:20:05,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:20:05,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443569469] [2021-11-23 14:20:05,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443569469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:20:05,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285128812] [2021-11-23 14:20:05,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:20:05,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:20:05,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:20:05,715 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:20:05,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-23 14:20:06,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-11-23 14:20:06,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:20:06,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-23 14:20:06,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:20:06,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 14:20:07,013 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,075 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,131 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,187 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,244 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,299 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,359 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,416 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,538 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,602 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,663 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,723 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,788 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,865 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,930 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:07,997 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:08,061 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:20:08,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-23 14:20:11,853 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-23 14:20:11,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 45 [2021-11-23 14:20:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 667 proven. 550 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-23 14:20:11,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:20:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 612 proven. 568 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-23 14:20:28,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285128812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:20:28,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:20:28,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 47, 45] total 131 [2021-11-23 14:20:28,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798169873] [2021-11-23 14:20:28,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:20:28,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-23 14:20:28,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:20:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-23 14:20:28,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2381, Invalid=14649, Unknown=0, NotChecked=0, Total=17030 [2021-11-23 14:20:28,118 INFO L87 Difference]: Start difference. First operand 224 states and 260 transitions. Second operand has 131 states, 131 states have (on average 3.450381679389313) internal successors, (452), 131 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:20:39,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:20:39,577 INFO L93 Difference]: Finished difference Result 497 states and 555 transitions. [2021-11-23 14:20:39,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-11-23 14:20:39,577 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.450381679389313) internal successors, (452), 131 states have internal predecessors, (452), 0 states have call successors, (0), 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 179 [2021-11-23 14:20:39,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:20:39,579 INFO L225 Difference]: With dead ends: 497 [2021-11-23 14:20:39,579 INFO L226 Difference]: Without dead ends: 342 [2021-11-23 14:20:39,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 302 SyntacticMatches, 37 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17940 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=6770, Invalid=61612, Unknown=0, NotChecked=0, Total=68382 [2021-11-23 14:20:39,582 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 256 mSDsluCounter, 1514 mSDsCounter, 0 mSdLazyCounter, 3318 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1559 SdHoareTripleChecker+Invalid, 4813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 3318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1310 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-23 14:20:39,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1559 Invalid, 4813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 3318 Invalid, 0 Unknown, 1310 Unchecked, 1.9s Time] [2021-11-23 14:20:39,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-11-23 14:20:39,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 269. [2021-11-23 14:20:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.1940298507462686) internal successors, (320), 268 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:20:39,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 320 transitions. [2021-11-23 14:20:39,750 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 320 transitions. Word has length 179 [2021-11-23 14:20:39,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:20:39,750 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 320 transitions. [2021-11-23 14:20:39,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.450381679389313) internal successors, (452), 131 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:20:39,751 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 320 transitions. [2021-11-23 14:20:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-23 14:20:39,752 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:20:39,753 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:20:39,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-23 14:20:39,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-23 14:20:39,979 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:20:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:20:39,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1423377830, now seen corresponding path program 21 times [2021-11-23 14:20:39,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:20:39,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893178841] [2021-11-23 14:20:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:20:39,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:20:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:20:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 1541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:20:42,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:20:42,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893178841] [2021-11-23 14:20:42,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893178841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:20:42,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040087724] [2021-11-23 14:20:42,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 14:20:42,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:20:42,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:20:42,131 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:20:42,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-23 14:20:43,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-11-23 14:20:43,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:20:43,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 14:20:43,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:20:44,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 14:20:48,079 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-23 14:20:48,079 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 76 treesize of output 39 [2021-11-23 14:20:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 630 proven. 550 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-23 14:20:48,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:20:51,645 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 30 treesize of output 28 [2021-11-23 14:20:51,647 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 45 treesize of output 39 [2021-11-23 14:20:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 612 proven. 568 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-23 14:20:51,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040087724] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:20:51,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:20:51,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 107 [2021-11-23 14:20:51,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127850306] [2021-11-23 14:20:51,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:20:51,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-23 14:20:51,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:20:51,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-23 14:20:51,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1284, Invalid=10058, Unknown=0, NotChecked=0, Total=11342 [2021-11-23 14:20:51,832 INFO L87 Difference]: Start difference. First operand 269 states and 320 transitions. Second operand has 107 states, 107 states have (on average 3.6728971962616823) internal successors, (393), 107 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:20:58,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:20:58,027 INFO L93 Difference]: Finished difference Result 423 states and 480 transitions. [2021-11-23 14:20:58,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-23 14:20:58,028 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.6728971962616823) internal successors, (393), 107 states have internal predecessors, (393), 0 states have call successors, (0), 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 179 [2021-11-23 14:20:58,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:20:58,030 INFO L225 Difference]: With dead ends: 423 [2021-11-23 14:20:58,031 INFO L226 Difference]: Without dead ends: 343 [2021-11-23 14:20:58,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 332 SyntacticMatches, 19 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4876 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2535, Invalid=24855, Unknown=0, NotChecked=0, Total=27390 [2021-11-23 14:20:58,034 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 273 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 4052 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1179 SdHoareTripleChecker+Invalid, 4886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 4052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 714 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:20:58,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 1179 Invalid, 4886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 4052 Invalid, 0 Unknown, 714 Unchecked, 2.1s Time] [2021-11-23 14:20:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-23 14:20:58,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 272. [2021-11-23 14:20:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.1955719557195572) internal successors, (324), 271 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:20:58,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 324 transitions. [2021-11-23 14:20:58,199 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 324 transitions. Word has length 179 [2021-11-23 14:20:58,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:20:58,200 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 324 transitions. [2021-11-23 14:20:58,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.6728971962616823) internal successors, (393), 107 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:20:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 324 transitions. [2021-11-23 14:20:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-23 14:20:58,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:20:58,201 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:20:58,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-23 14:20:58,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-23 14:20:58,402 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:20:58,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:20:58,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1545071262, now seen corresponding path program 22 times [2021-11-23 14:20:58,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:20:58,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714019743] [2021-11-23 14:20:58,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:20:58,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:20:58,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:21:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 1541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:21:01,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:21:01,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714019743] [2021-11-23 14:21:01,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714019743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:21:01,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750243077] [2021-11-23 14:21:01,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:21:01,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:21:01,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:21:01,635 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:21:01,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-23 14:21:01,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:21:01,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:21:01,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-23 14:21:01,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:21:02,153 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:21:03,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:21:04,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-23 14:21:04,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:21:06,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2021-11-23 14:21:06,030 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 14:21:06,030 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 36 treesize of output 26 [2021-11-23 14:21:06,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-23 14:21:06,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750243077] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:21:06,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:21:06,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 43, 43] total 107 [2021-11-23 14:21:06,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346776117] [2021-11-23 14:21:06,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:21:06,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-23 14:21:06,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:21:06,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-23 14:21:06,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=10757, Unknown=0, NotChecked=0, Total=11342 [2021-11-23 14:21:06,360 INFO L87 Difference]: Start difference. First operand 272 states and 324 transitions. Second operand has 107 states, 107 states have (on average 3.6542056074766354) internal successors, (391), 107 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:21:23,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:21:23,761 INFO L93 Difference]: Finished difference Result 413 states and 472 transitions. [2021-11-23 14:21:23,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2021-11-23 14:21:23,762 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 3.6542056074766354) internal successors, (391), 107 states have internal predecessors, (391), 0 states have call successors, (0), 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 179 [2021-11-23 14:21:23,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:21:23,765 INFO L225 Difference]: With dead ends: 413 [2021-11-23 14:21:23,765 INFO L226 Difference]: Without dead ends: 411 [2021-11-23 14:21:23,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 312 SyntacticMatches, 5 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15542 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=3726, Invalid=58026, Unknown=0, NotChecked=0, Total=61752 [2021-11-23 14:21:23,770 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 728 mSDsluCounter, 2328 mSDsCounter, 0 mSdLazyCounter, 10886 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 2374 SdHoareTripleChecker+Invalid, 11548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 10886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-23 14:21:23,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 2374 Invalid, 11548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 10886 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-11-23 14:21:23,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-11-23 14:21:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 276. [2021-11-23 14:21:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.1927272727272726) internal successors, (328), 275 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:21:23,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 328 transitions. [2021-11-23 14:21:23,933 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 328 transitions. Word has length 179 [2021-11-23 14:21:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:21:23,933 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 328 transitions. [2021-11-23 14:21:23,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 3.6542056074766354) internal successors, (391), 107 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:21:23,933 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 328 transitions. [2021-11-23 14:21:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 14:21:23,934 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:21:23,934 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:21:23,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-23 14:21:24,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-23 14:21:24,135 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:21:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:21:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1507291240, now seen corresponding path program 23 times [2021-11-23 14:21:24,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:21:24,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929478720] [2021-11-23 14:21:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:21:24,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:21:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:21:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1615 backedges. 649 proven. 434 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-11-23 14:21:25,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:21:25,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929478720] [2021-11-23 14:21:25,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929478720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:21:25,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518673534] [2021-11-23 14:21:25,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 14:21:25,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:21:25,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:21:25,020 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:21:25,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-23 14:21:26,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-11-23 14:21:26,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:21:26,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 14:21:26,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:21:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1615 backedges. 722 proven. 532 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-23 14:21:27,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:21:27,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1615 backedges. 722 proven. 532 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-11-23 14:21:27,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518673534] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:21:27,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:21:27,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2021-11-23 14:21:27,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413093023] [2021-11-23 14:21:27,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:21:27,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-23 14:21:27,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:21:27,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-23 14:21:27,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2021-11-23 14:21:27,886 INFO L87 Difference]: Start difference. First operand 276 states and 328 transitions. Second operand has 65 states, 65 states have (on average 4.246153846153846) internal successors, (276), 65 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) [2021-11-23 14:21:29,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:21:29,202 INFO L93 Difference]: Finished difference Result 631 states and 745 transitions. [2021-11-23 14:21:29,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-23 14:21:29,202 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 4.246153846153846) internal successors, (276), 65 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 183 [2021-11-23 14:21:29,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:21:29,204 INFO L225 Difference]: With dead ends: 631 [2021-11-23 14:21:29,204 INFO L226 Difference]: Without dead ends: 306 [2021-11-23 14:21:29,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1661, Invalid=5479, Unknown=0, NotChecked=0, Total=7140 [2021-11-23 14:21:29,205 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 862 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:21:29,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 345 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 14:21:29,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-23 14:21:29,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 281. [2021-11-23 14:21:29,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.1928571428571428) internal successors, (334), 280 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:21:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 334 transitions. [2021-11-23 14:21:29,348 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 334 transitions. Word has length 183 [2021-11-23 14:21:29,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:21:29,348 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 334 transitions. [2021-11-23 14:21:29,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 4.246153846153846) internal successors, (276), 65 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) [2021-11-23 14:21:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 334 transitions. [2021-11-23 14:21:29,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-23 14:21:29,350 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:21:29,350 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:21:29,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-23 14:21:29,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-23 14:21:29,579 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:21:29,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:21:29,580 INFO L85 PathProgramCache]: Analyzing trace with hash -480833734, now seen corresponding path program 24 times [2021-11-23 14:21:29,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:21:29,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100245952] [2021-11-23 14:21:29,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:21:29,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:21:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:21:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 0 proven. 1712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:21:32,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:21:32,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100245952] [2021-11-23 14:21:32,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100245952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:21:32,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690838088] [2021-11-23 14:21:32,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 14:21:32,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:21:32,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:21:32,940 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:21:32,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-23 14:21:35,140 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-11-23 14:21:35,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:21:35,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 14:21:35,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:21:36,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-23 14:21:40,853 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-23 14:21:40,854 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 76 treesize of output 39 [2021-11-23 14:21:40,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 703 proven. 609 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-23 14:21:40,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:21:45,420 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 30 treesize of output 28 [2021-11-23 14:21:45,423 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 45 treesize of output 39 [2021-11-23 14:21:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 684 proven. 628 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-23 14:21:45,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690838088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:21:45,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:21:45,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 46, 46] total 135 [2021-11-23 14:21:45,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539630390] [2021-11-23 14:21:45,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:21:45,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2021-11-23 14:21:45,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:21:45,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-11-23 14:21:45,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1738, Invalid=16352, Unknown=0, NotChecked=0, Total=18090 [2021-11-23 14:21:45,625 INFO L87 Difference]: Start difference. First operand 281 states and 334 transitions. Second operand has 135 states, 135 states have (on average 3.066666666666667) internal successors, (414), 135 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:21:58,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:21:58,042 INFO L93 Difference]: Finished difference Result 455 states and 526 transitions. [2021-11-23 14:21:58,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-11-23 14:21:58,043 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 3.066666666666667) internal successors, (414), 135 states have internal predecessors, (414), 0 states have call successors, (0), 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 188 [2021-11-23 14:21:58,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:21:58,044 INFO L225 Difference]: With dead ends: 455 [2021-11-23 14:21:58,044 INFO L226 Difference]: Without dead ends: 371 [2021-11-23 14:21:58,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 349 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11834 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=4782, Invalid=51624, Unknown=0, NotChecked=0, Total=56406 [2021-11-23 14:21:58,047 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 486 mSDsluCounter, 1532 mSDsCounter, 0 mSdLazyCounter, 5737 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 7971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 5737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2032 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 14:21:58,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 1580 Invalid, 7971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 5737 Invalid, 0 Unknown, 2032 Unchecked, 3.0s Time] [2021-11-23 14:21:58,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-11-23 14:21:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 284. [2021-11-23 14:21:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.1943462897526502) internal successors, (338), 283 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:21:58,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 338 transitions. [2021-11-23 14:21:58,196 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 338 transitions. Word has length 188 [2021-11-23 14:21:58,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:21:58,196 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 338 transitions. [2021-11-23 14:21:58,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 3.066666666666667) internal successors, (414), 135 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:21:58,197 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 338 transitions. [2021-11-23 14:21:58,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-23 14:21:58,198 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:21:58,198 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:21:58,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-23 14:21:58,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:21:58,399 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:21:58,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:21:58,399 INFO L85 PathProgramCache]: Analyzing trace with hash 530702582, now seen corresponding path program 25 times [2021-11-23 14:21:58,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:21:58,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027216008] [2021-11-23 14:21:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:21:58,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:21:58,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:22:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 0 proven. 1712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:22:01,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:22:01,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027216008] [2021-11-23 14:22:01,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027216008] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:22:01,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593288548] [2021-11-23 14:22:01,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 14:22:01,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:22:01,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:22:01,566 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:22:01,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-23 14:22:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:22:01,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-23 14:22:01,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:22:02,311 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:22:04,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:22:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 14:22:04,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:22:06,649 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 34 treesize of output 28 [2021-11-23 14:22:06,653 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 14:22:06,653 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 36 treesize of output 26 [2021-11-23 14:22:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1712 backedges. 0 proven. 1312 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-11-23 14:22:06,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593288548] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:22:06,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:22:06,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 45, 45] total 112 [2021-11-23 14:22:06,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368506627] [2021-11-23 14:22:06,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:22:06,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-23 14:22:06,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:22:06,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-23 14:22:06,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=11808, Unknown=0, NotChecked=0, Total=12432 [2021-11-23 14:22:06,995 INFO L87 Difference]: Start difference. First operand 284 states and 338 transitions. Second operand has 112 states, 112 states have (on average 3.6785714285714284) internal successors, (412), 112 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:22:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:22:25,774 INFO L93 Difference]: Finished difference Result 431 states and 492 transitions. [2021-11-23 14:22:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-11-23 14:22:25,775 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.6785714285714284) internal successors, (412), 112 states have internal predecessors, (412), 0 states have call successors, (0), 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 188 [2021-11-23 14:22:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:22:25,777 INFO L225 Difference]: With dead ends: 431 [2021-11-23 14:22:25,777 INFO L226 Difference]: Without dead ends: 429 [2021-11-23 14:22:25,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 327 SyntacticMatches, 6 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17084 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=3985, Invalid=63875, Unknown=0, NotChecked=0, Total=67860 [2021-11-23 14:22:25,781 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 772 mSDsluCounter, 2596 mSDsCounter, 0 mSdLazyCounter, 12028 mSolverCounterSat, 685 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 2644 SdHoareTripleChecker+Invalid, 12713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 685 IncrementalHoareTripleChecker+Valid, 12028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:22:25,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 2644 Invalid, 12713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [685 Valid, 12028 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2021-11-23 14:22:25,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-23 14:22:25,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 288. [2021-11-23 14:22:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.1916376306620209) internal successors, (342), 287 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:22:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 342 transitions. [2021-11-23 14:22:25,925 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 342 transitions. Word has length 188 [2021-11-23 14:22:25,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:22:25,925 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 342 transitions. [2021-11-23 14:22:25,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.6785714285714284) internal successors, (412), 112 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:22:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 342 transitions. [2021-11-23 14:22:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-23 14:22:25,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:22:25,927 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:22:25,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-23 14:22:26,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:22:26,128 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:22:26,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:22:26,128 INFO L85 PathProgramCache]: Analyzing trace with hash -768970452, now seen corresponding path program 26 times [2021-11-23 14:22:26,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:22:26,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40873831] [2021-11-23 14:22:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:22:26,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:22:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:22:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 723 proven. 477 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-23 14:22:27,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:22:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40873831] [2021-11-23 14:22:27,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40873831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:22:27,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838912428] [2021-11-23 14:22:27,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 14:22:27,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:22:27,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:22:27,016 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:22:27,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-23 14:22:27,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 14:22:27,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:22:27,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 14:22:27,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:22:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 800 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-23 14:22:28,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:22:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1790 backedges. 800 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-11-23 14:22:29,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838912428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:22:29,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:22:29,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2021-11-23 14:22:29,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963021396] [2021-11-23 14:22:29,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:22:29,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-23 14:22:29,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:22:29,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-23 14:22:29,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 14:22:29,115 INFO L87 Difference]: Start difference. First operand 288 states and 342 transitions. Second operand has 68 states, 68 states have (on average 3.323529411764706) internal successors, (226), 68 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) [2021-11-23 14:22:30,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:22:30,507 INFO L93 Difference]: Finished difference Result 653 states and 771 transitions. [2021-11-23 14:22:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-23 14:22:30,508 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.323529411764706) internal successors, (226), 68 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 192 [2021-11-23 14:22:30,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:22:30,510 INFO L225 Difference]: With dead ends: 653 [2021-11-23 14:22:30,510 INFO L226 Difference]: Without dead ends: 316 [2021-11-23 14:22:30,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1817, Invalid=6015, Unknown=0, NotChecked=0, Total=7832 [2021-11-23 14:22:30,511 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 1241 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 14:22:30,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1241 Valid, 306 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 14:22:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-11-23 14:22:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 248. [2021-11-23 14:22:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.165991902834008) internal successors, (288), 247 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:22:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 288 transitions. [2021-11-23 14:22:30,637 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 288 transitions. Word has length 192 [2021-11-23 14:22:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:22:30,637 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 288 transitions. [2021-11-23 14:22:30,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.323529411764706) internal successors, (226), 68 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) [2021-11-23 14:22:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 288 transitions. [2021-11-23 14:22:30,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-23 14:22:30,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:22:30,640 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:22:30,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-23 14:22:30,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:22:30,841 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:22:30,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:22:30,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1703045268, now seen corresponding path program 34 times [2021-11-23 14:22:30,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:22:30,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996071560] [2021-11-23 14:22:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:22:30,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:22:31,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:22:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:22:32,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:22:32,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996071560] [2021-11-23 14:22:32,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996071560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:22:32,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585814789] [2021-11-23 14:22:32,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 14:22:32,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:22:32,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:22:32,938 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:22:32,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-23 14:22:33,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 14:22:33,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:22:33,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-23 14:22:33,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:22:33,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,251 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,268 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,288 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,308 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,325 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,346 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,363 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,383 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,413 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,438 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,457 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,477 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,497 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,524 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,547 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 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 14:22:33,635 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 0 case distinctions, treesize of input 41 treesize of output 21 [2021-11-23 14:22:35,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-23 14:22:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-23 14:22:35,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:22:41,491 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 82 treesize of output 70 [2021-11-23 14:22:41,506 INFO L354 Elim1Store]: treesize reduction 37, result has 21.3 percent of original size [2021-11-23 14:22:41,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 290 treesize of output 242 [2021-11-23 14:22:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 1451 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-23 14:22:41,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585814789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:22:41,599 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:22:41,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 48] total 112 [2021-11-23 14:22:41,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511489375] [2021-11-23 14:22:41,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:22:41,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-23 14:22:41,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:22:41,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-23 14:22:41,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=12038, Unknown=0, NotChecked=0, Total=12432 [2021-11-23 14:22:41,602 INFO L87 Difference]: Start difference. First operand 248 states and 288 transitions. Second operand has 112 states, 112 states have (on average 3.7857142857142856) internal successors, (424), 112 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:22:56,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:22:56,075 INFO L93 Difference]: Finished difference Result 398 states and 445 transitions. [2021-11-23 14:22:56,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-11-23 14:22:56,076 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.7857142857142856) internal successors, (424), 112 states have internal predecessors, (424), 0 states have call successors, (0), 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 197 [2021-11-23 14:22:56,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:22:56,078 INFO L225 Difference]: With dead ends: 398 [2021-11-23 14:22:56,078 INFO L226 Difference]: Without dead ends: 396 [2021-11-23 14:22:56,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 308 SyntacticMatches, 44 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9780 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=1186, Invalid=39416, Unknown=0, NotChecked=0, Total=40602 [2021-11-23 14:22:56,081 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 373 mSDsluCounter, 3042 mSDsCounter, 0 mSdLazyCounter, 13905 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 3093 SdHoareTripleChecker+Invalid, 14293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 13905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-23 14:22:56,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 3093 Invalid, 14293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 13905 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2021-11-23 14:22:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-23 14:22:56,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 252. [2021-11-23 14:22:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.1633466135458168) internal successors, (292), 251 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) [2021-11-23 14:22:56,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 292 transitions. [2021-11-23 14:22:56,218 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 292 transitions. Word has length 197 [2021-11-23 14:22:56,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:22:56,218 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 292 transitions. [2021-11-23 14:22:56,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.7857142857142856) internal successors, (424), 112 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:22:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 292 transitions. [2021-11-23 14:22:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-23 14:22:56,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:22:56,221 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:22:56,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-23 14:22:56,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:22:56,435 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:22:56,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:22:56,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1625163318, now seen corresponding path program 35 times [2021-11-23 14:22:56,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:22:56,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877167336] [2021-11-23 14:22:56,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:22:56,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:22:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:22:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 801 proven. 522 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-23 14:22:57,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:22:57,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877167336] [2021-11-23 14:22:57,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877167336] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:22:57,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902489602] [2021-11-23 14:22:57,541 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 14:22:57,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:22:57,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:22:57,543 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:22:57,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-23 14:23:00,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-11-23 14:23:00,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:23:00,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-23 14:23:00,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:23:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 882 proven. 651 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-23 14:23:02,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:23:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 882 proven. 651 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-11-23 14:23:02,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902489602] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:23:02,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:23:02,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2021-11-23 14:23:02,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614947461] [2021-11-23 14:23:02,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:23:02,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-23 14:23:02,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:23:02,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-23 14:23:02,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3815, Unknown=0, NotChecked=0, Total=4970 [2021-11-23 14:23:02,771 INFO L87 Difference]: Start difference. First operand 252 states and 292 transitions. Second operand has 71 states, 71 states have (on average 4.23943661971831) internal successors, (301), 71 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:04,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 14:23:04,284 INFO L93 Difference]: Finished difference Result 579 states and 669 transitions. [2021-11-23 14:23:04,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-23 14:23:04,285 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 4.23943661971831) internal successors, (301), 71 states have internal predecessors, (301), 0 states have call successors, (0), 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 201 [2021-11-23 14:23:04,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 14:23:04,287 INFO L225 Difference]: With dead ends: 579 [2021-11-23 14:23:04,287 INFO L226 Difference]: Without dead ends: 278 [2021-11-23 14:23:04,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1980, Invalid=6576, Unknown=0, NotChecked=0, Total=8556 [2021-11-23 14:23:04,289 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 1169 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1169 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 14:23:04,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1169 Valid, 444 Invalid, 1689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 14:23:04,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-23 14:23:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 260. [2021-11-23 14:23:04,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.166023166023166) internal successors, (302), 259 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:04,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 302 transitions. [2021-11-23 14:23:04,439 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 302 transitions. Word has length 201 [2021-11-23 14:23:04,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 14:23:04,439 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 302 transitions. [2021-11-23 14:23:04,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 4.23943661971831) internal successors, (301), 71 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 14:23:04,440 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 302 transitions. [2021-11-23 14:23:04,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-23 14:23:04,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 14:23:04,441 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 14:23:04,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-23 14:23:04,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-11-23 14:23:04,642 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 14:23:04,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 14:23:04,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1845478112, now seen corresponding path program 36 times [2021-11-23 14:23:04,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 14:23:04,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637918390] [2021-11-23 14:23:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 14:23:04,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 14:23:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 14:23:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 0 proven. 2081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 14:23:08,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 14:23:08,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637918390] [2021-11-23 14:23:08,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637918390] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 14:23:08,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209483110] [2021-11-23 14:23:08,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 14:23:08,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 14:23:08,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 14:23:08,392 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 14:23:08,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40414e88-5342-445e-b602-f9c355cc74a1/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-23 14:23:10,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-23 14:23:10,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 14:23:10,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-23 14:23:10,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 14:23:13,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2021-11-23 14:23:17,917 INFO L354 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2021-11-23 14:23:17,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 45 [2021-11-23 14:23:18,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 925 proven. 505 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-23 14:23:18,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 14:23:23,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 46 [2021-11-23 14:23:23,462 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-23 14:23:23,462 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 67 treesize of output 49 [2021-11-23 14:23:23,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 840 proven. 590 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2021-11-23 14:23:23,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209483110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 14:23:23,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 14:23:23,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 53, 53] total 152 [2021-11-23 14:23:23,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716255354] [2021-11-23 14:23:23,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 14:23:23,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2021-11-23 14:23:23,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 14:23:23,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2021-11-23 14:23:23,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2243, Invalid=20709, Unknown=0, NotChecked=0, Total=22952 [2021-11-23 14:23:23,720 INFO L87 Difference]: Start difference. First operand 260 states and 302 transitions. Second operand has 152 states, 152 states have (on average 2.875) internal successors, (437), 152 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)