./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa --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 5952061731474d390646c291ccf1d0136c1d856e30481accbc86db371431d703 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:10:22,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:10:22,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:10:22,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:10:22,808 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:10:22,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:10:22,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:10:22,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:10:22,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:10:22,816 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:10:22,817 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:10:22,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:10:22,819 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:10:22,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:10:22,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:10:22,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:10:22,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:10:22,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:10:22,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:10:22,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:10:22,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:10:22,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:10:22,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:10:22,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:10:22,834 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:10:22,835 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:10:22,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:10:22,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:10:22,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:10:22,837 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:10:22,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:10:22,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:10:22,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:10:22,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:10:22,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:10:22,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:10:22,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:10:22,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:10:22,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:10:22,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:10:22,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:10:22,843 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:10:22,861 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:10:22,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:10:22,862 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:10:22,862 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:10:22,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:10:22,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:10:22,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:10:22,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:10:22,863 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:10:22,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:10:22,864 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:10:22,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:10:22,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:10:22,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:10:22,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:10:22,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:10:22,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:10:22,865 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:10:22,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:10:22,865 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:10:22,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:10:22,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:10:22,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:10:22,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:10:22,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:10:22,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:10:22,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:10:22,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:10:22,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:10:22,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:10:22,867 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:10:22,867 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:10:22,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:10:22,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:10:22,867 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_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5952061731474d390646c291ccf1d0136c1d856e30481accbc86db371431d703 [2021-12-06 18:10:23,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:10:23,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:10:23,073 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:10:23,074 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:10:23,075 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:10:23,076 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2021-12-06 18:10:23,118 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/data/00f53e137/9921ffee71084ba4a90dd419e1ef739e/FLAG4c7841adc [2021-12-06 18:10:23,482 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:10:23,483 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2021-12-06 18:10:23,488 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/data/00f53e137/9921ffee71084ba4a90dd419e1ef739e/FLAG4c7841adc [2021-12-06 18:10:23,497 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/data/00f53e137/9921ffee71084ba4a90dd419e1ef739e [2021-12-06 18:10:23,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:10:23,500 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:10:23,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:10:23,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:10:23,504 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:10:23,505 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:10:23" (1/1) ... [2021-12-06 18:10:23,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5156a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:23, skipping insertion in model container [2021-12-06 18:10:23,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:10:23" (1/1) ... [2021-12-06 18:10:23,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:10:23,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:10:23,635 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_5f2dbb38-0614-4518-bc10-339ade76673d/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c[947,960] [2021-12-06 18:10:23,637 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:10:23,643 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:10:23,654 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_5f2dbb38-0614-4518-bc10-339ade76673d/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c[947,960] [2021-12-06 18:10:23,655 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:10:23,664 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:10:23,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:23 WrapperNode [2021-12-06 18:10:23,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:10:23,665 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:10:23,665 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:10:23,665 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:10:23,671 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:23" (1/1) ... [2021-12-06 18:10:23,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:23" (1/1) ... [2021-12-06 18:10:23,686 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 21 [2021-12-06 18:10:23,686 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:10:23,687 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:10:23,687 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:10:23,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:10:23,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:23" (1/1) ... [2021-12-06 18:10:23,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:23" (1/1) ... [2021-12-06 18:10:23,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:23" (1/1) ... [2021-12-06 18:10:23,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:23" (1/1) ... [2021-12-06 18:10:23,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:23" (1/1) ... [2021-12-06 18:10:23,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:23" (1/1) ... [2021-12-06 18:10:23,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:23" (1/1) ... [2021-12-06 18:10:23,699 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:10:23,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:10:23,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:10:23,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:10:23,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:23" (1/1) ... [2021-12-06 18:10:23,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:10:23,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:23,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:10:23,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:10:23,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:10:23,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:10:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-12-06 18:10:23,753 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-12-06 18:10:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-12-06 18:10:23,753 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-12-06 18:10:23,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:10:23,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:10:23,796 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:10:23,797 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:10:23,878 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:10:23,882 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:10:23,883 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-06 18:10:23,884 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:10:23 BoogieIcfgContainer [2021-12-06 18:10:23,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:10:23,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:10:23,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:10:23,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:10:23,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:10:23" (1/3) ... [2021-12-06 18:10:23,891 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6455b7c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:10:23, skipping insertion in model container [2021-12-06 18:10:23,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:10:23" (2/3) ... [2021-12-06 18:10:23,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6455b7c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:10:23, skipping insertion in model container [2021-12-06 18:10:23,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:10:23" (3/3) ... [2021-12-06 18:10:23,893 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-2.c [2021-12-06 18:10:23,899 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:10:23,899 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:10:23,945 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:10:23,951 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 [2021-12-06 18:10:23,951 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:10:23,965 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 18:10:23,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 18:10:23,969 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:23,970 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:23,970 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:23,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:23,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1123300790, now seen corresponding path program 1 times [2021-12-06 18:10:23,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:23,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426166633] [2021-12-06 18:10:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:23,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:24,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:24,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:10:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:24,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:24,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426166633] [2021-12-06 18:10:24,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426166633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:24,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:24,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:10:24,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135850900] [2021-12-06 18:10:24,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:24,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:10:24,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:24,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:10:24,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:10:24,176 INFO L87 Difference]: Start difference. First operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:10:24,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:24,209 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-12-06 18:10:24,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:10:24,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-12-06 18:10:24,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:24,216 INFO L225 Difference]: With dead ends: 43 [2021-12-06 18:10:24,217 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 18:10:24,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:10:24,221 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 4 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:24,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 126 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:10:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 18:10:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-06 18:10:24,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 18:10:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-12-06 18:10:24,252 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-12-06 18:10:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:24,253 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-12-06 18:10:24,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:10:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-12-06 18:10:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 18:10:24,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:24,254 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:24,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:10:24,254 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:24,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1177745932, now seen corresponding path program 1 times [2021-12-06 18:10:24,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:24,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848428398] [2021-12-06 18:10:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:24,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:24,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:10:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:10:24,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:24,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848428398] [2021-12-06 18:10:24,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848428398] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:10:24,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:10:24,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:10:24,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875136720] [2021-12-06 18:10:24,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:10:24,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:10:24,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:24,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:10:24,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:10:24,311 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:10:24,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:24,325 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2021-12-06 18:10:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:10:24,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-12-06 18:10:24,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:24,327 INFO L225 Difference]: With dead ends: 33 [2021-12-06 18:10:24,327 INFO L226 Difference]: Without dead ends: 29 [2021-12-06 18:10:24,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:10:24,329 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:24,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 125 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:10:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-06 18:10:24,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-12-06 18:10:24,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-06 18:10:24,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-12-06 18:10:24,335 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 11 [2021-12-06 18:10:24,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:24,335 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-12-06 18:10:24,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 18:10:24,336 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-12-06 18:10:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 18:10:24,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:24,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:24,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:10:24,337 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:24,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:24,338 INFO L85 PathProgramCache]: Analyzing trace with hash 2110588723, now seen corresponding path program 1 times [2021-12-06 18:10:24,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:24,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290591677] [2021-12-06 18:10:24,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:24,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:24,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:10:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:24,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:24,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:24,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:10:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:24,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:10:24,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:24,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290591677] [2021-12-06 18:10:24,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290591677] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:24,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245379724] [2021-12-06 18:10:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:24,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:24,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:24,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:24,424 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:10:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:24,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:10:24,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:10:24,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:10:24,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245379724] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:24,714 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:24,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2021-12-06 18:10:24,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067680361] [2021-12-06 18:10:24,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:24,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:10:24,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:24,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:10:24,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:10:24,717 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 18:10:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:24,819 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-12-06 18:10:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:10:24,819 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) Word has length 23 [2021-12-06 18:10:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:24,820 INFO L225 Difference]: With dead ends: 55 [2021-12-06 18:10:24,820 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 18:10:24,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:10:24,822 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:24,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 141 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:10:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 18:10:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2021-12-06 18:10:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 18:10:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-12-06 18:10:24,828 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 23 [2021-12-06 18:10:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:24,828 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-12-06 18:10:24,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-06 18:10:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-12-06 18:10:24,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 18:10:24,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:24,830 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:24,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:10:25,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:25,032 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:25,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:25,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1277869167, now seen corresponding path program 1 times [2021-12-06 18:10:25,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:25,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183174440] [2021-12-06 18:10:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:25,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:25,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:10:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:25,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:25,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:25,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:10:25,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:25,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183174440] [2021-12-06 18:10:25,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183174440] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:25,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834598996] [2021-12-06 18:10:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:25,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:25,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:25,242 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:25,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:10:25,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:25,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:10:25,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:10:25,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:10:25,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834598996] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:25,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:25,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2021-12-06 18:10:25,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280906770] [2021-12-06 18:10:25,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:25,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 18:10:25,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:25,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 18:10:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-06 18:10:25,431 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 18:10:25,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:25,516 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2021-12-06 18:10:25,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 18:10:25,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 24 [2021-12-06 18:10:25,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:25,519 INFO L225 Difference]: With dead ends: 51 [2021-12-06 18:10:25,519 INFO L226 Difference]: Without dead ends: 47 [2021-12-06 18:10:25,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-06 18:10:25,520 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:25,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 120 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:10:25,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-06 18:10:25,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-12-06 18:10:25,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (15), 9 states have call predecessors, (15), 9 states have call successors, (15) [2021-12-06 18:10:25,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-12-06 18:10:25,529 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 24 [2021-12-06 18:10:25,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:25,529 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-12-06 18:10:25,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2021-12-06 18:10:25,529 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-12-06 18:10:25,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 18:10:25,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:25,531 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:25,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:10:25,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:25,733 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:25,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:25,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2061621832, now seen corresponding path program 1 times [2021-12-06 18:10:25,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:25,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700664473] [2021-12-06 18:10:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:25,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:25,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:10:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:25,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:25,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:25,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:25,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-06 18:10:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:25,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-06 18:10:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:10:25,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:25,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700664473] [2021-12-06 18:10:25,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700664473] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:25,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181151761] [2021-12-06 18:10:25,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:25,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:25,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:25,850 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:25,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:10:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:25,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 18:10:25,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:25,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 18:10:25,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:26,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:10:26,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181151761] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:26,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:26,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2021-12-06 18:10:26,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888443464] [2021-12-06 18:10:26,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:26,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 18:10:26,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:26,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 18:10:26,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-12-06 18:10:26,177 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-06 18:10:26,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:26,309 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2021-12-06 18:10:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:10:26,309 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) Word has length 36 [2021-12-06 18:10:26,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:26,311 INFO L225 Difference]: With dead ends: 105 [2021-12-06 18:10:26,311 INFO L226 Difference]: Without dead ends: 63 [2021-12-06 18:10:26,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-12-06 18:10:26,313 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:26,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 118 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:10:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-06 18:10:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-12-06 18:10:26,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 12 states have call successors, (12), 5 states have call predecessors, (12), 9 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2021-12-06 18:10:26,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 92 transitions. [2021-12-06 18:10:26,322 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 92 transitions. Word has length 36 [2021-12-06 18:10:26,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:26,322 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 92 transitions. [2021-12-06 18:10:26,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-06 18:10:26,323 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 92 transitions. [2021-12-06 18:10:26,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-06 18:10:26,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:26,324 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:26,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:10:26,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:26,526 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:26,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:26,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1167294498, now seen corresponding path program 1 times [2021-12-06 18:10:26,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:26,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350817597] [2021-12-06 18:10:26,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:26,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:26,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:26,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:10:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:26,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:26,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:26,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:26,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:26,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:26,696 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 18:10:26,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:26,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350817597] [2021-12-06 18:10:26,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350817597] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:26,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644525186] [2021-12-06 18:10:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:26,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:26,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:26,698 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:26,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:10:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:26,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 18:10:26,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:26,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:10:26,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 18:10:26,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644525186] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:26,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:26,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 18 [2021-12-06 18:10:26,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265006839] [2021-12-06 18:10:26,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:26,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:10:26,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:26,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:10:26,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:10:26,970 INFO L87 Difference]: Start difference. First operand 63 states and 92 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-06 18:10:27,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:27,170 INFO L93 Difference]: Finished difference Result 177 states and 321 transitions. [2021-12-06 18:10:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:10:27,171 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) Word has length 37 [2021-12-06 18:10:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:27,173 INFO L225 Difference]: With dead ends: 177 [2021-12-06 18:10:27,173 INFO L226 Difference]: Without dead ends: 117 [2021-12-06 18:10:27,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:10:27,175 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 60 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:27,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 276 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:10:27,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-12-06 18:10:27,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2021-12-06 18:10:27,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 69 states have internal predecessors, (80), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (65), 26 states have call predecessors, (65), 21 states have call successors, (65) [2021-12-06 18:10:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 166 transitions. [2021-12-06 18:10:27,192 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 166 transitions. Word has length 37 [2021-12-06 18:10:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:27,193 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 166 transitions. [2021-12-06 18:10:27,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 18 states have internal predecessors, (50), 11 states have call successors, (13), 1 states have call predecessors, (13), 7 states have return successors, (13), 6 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-06 18:10:27,193 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 166 transitions. [2021-12-06 18:10:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-06 18:10:27,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:27,196 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:27,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:10:27,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:27,397 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:27,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:27,398 INFO L85 PathProgramCache]: Analyzing trace with hash 384535367, now seen corresponding path program 1 times [2021-12-06 18:10:27,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:27,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657813587] [2021-12-06 18:10:27,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:27,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:27,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:10:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:27,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:27,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:27,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:27,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:27,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:27,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-06 18:10:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:27,521 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-06 18:10:27,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:27,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657813587] [2021-12-06 18:10:27,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657813587] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:27,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040846896] [2021-12-06 18:10:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:27,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:27,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:27,522 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:27,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:10:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:27,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 18:10:27,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 18:10:27,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 18:10:27,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040846896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:27,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:27,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 11] total 20 [2021-12-06 18:10:27,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884877637] [2021-12-06 18:10:27,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:27,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:10:27,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:27,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:10:27,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:10:27,936 INFO L87 Difference]: Start difference. First operand 103 states and 166 transitions. Second operand has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) [2021-12-06 18:10:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:28,201 INFO L93 Difference]: Finished difference Result 255 states and 495 transitions. [2021-12-06 18:10:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 18:10:28,201 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) Word has length 51 [2021-12-06 18:10:28,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:28,205 INFO L225 Difference]: With dead ends: 255 [2021-12-06 18:10:28,205 INFO L226 Difference]: Without dead ends: 155 [2021-12-06 18:10:28,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-12-06 18:10:28,208 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 76 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:28,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 280 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:10:28,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-06 18:10:28,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2021-12-06 18:10:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.2253521126760563) internal successors, (87), 72 states have internal predecessors, (87), 24 states have call successors, (24), 9 states have call predecessors, (24), 13 states have return successors, (66), 27 states have call predecessors, (66), 24 states have call successors, (66) [2021-12-06 18:10:28,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 177 transitions. [2021-12-06 18:10:28,232 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 177 transitions. Word has length 51 [2021-12-06 18:10:28,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:28,233 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 177 transitions. [2021-12-06 18:10:28,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 20 states have internal predecessors, (60), 14 states have call successors, (16), 1 states have call predecessors, (16), 8 states have return successors, (18), 7 states have call predecessors, (18), 14 states have call successors, (18) [2021-12-06 18:10:28,233 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 177 transitions. [2021-12-06 18:10:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-06 18:10:28,237 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:28,237 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:28,263 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 18:10:28,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 18:10:28,439 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash -586612948, now seen corresponding path program 1 times [2021-12-06 18:10:28,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:28,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250836006] [2021-12-06 18:10:28,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:28,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:10:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:10:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-12-06 18:10:28,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:28,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250836006] [2021-12-06 18:10:28,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250836006] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:28,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290465024] [2021-12-06 18:10:28,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:28,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:28,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:28,755 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:28,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:10:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:28,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:10:28,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:28,936 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-06 18:10:28,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:29,352 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 102 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-06 18:10:29,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290465024] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:29,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:29,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 24 [2021-12-06 18:10:29,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923914287] [2021-12-06 18:10:29,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:29,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-06 18:10:29,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:29,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-06 18:10:29,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:10:29,354 INFO L87 Difference]: Start difference. First operand 109 states and 177 transitions. Second operand has 24 states, 22 states have (on average 3.5) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 11 states have call predecessors, (27), 18 states have call successors, (27) [2021-12-06 18:10:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:29,628 INFO L93 Difference]: Finished difference Result 240 states and 462 transitions. [2021-12-06 18:10:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-06 18:10:29,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.5) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 11 states have call predecessors, (27), 18 states have call successors, (27) Word has length 93 [2021-12-06 18:10:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:29,630 INFO L225 Difference]: With dead ends: 240 [2021-12-06 18:10:29,630 INFO L226 Difference]: Without dead ends: 107 [2021-12-06 18:10:29,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2021-12-06 18:10:29,632 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 111 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:29,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 270 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:10:29,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-06 18:10:29,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-12-06 18:10:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 58 states have internal predecessors, (67), 14 states have call successors, (14), 8 states have call predecessors, (14), 12 states have return successors, (35), 17 states have call predecessors, (35), 14 states have call successors, (35) [2021-12-06 18:10:29,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2021-12-06 18:10:29,641 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 93 [2021-12-06 18:10:29,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:29,642 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2021-12-06 18:10:29,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.5) internal successors, (77), 24 states have internal predecessors, (77), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 11 states have call predecessors, (27), 18 states have call successors, (27) [2021-12-06 18:10:29,642 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2021-12-06 18:10:29,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-06 18:10:29,644 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:29,644 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:29,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:10:29,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 18:10:29,846 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:29,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:29,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1129417830, now seen corresponding path program 1 times [2021-12-06 18:10:29,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:29,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313839446] [2021-12-06 18:10:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:29,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:29,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:10:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:29,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:29,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:30,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:30,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-06 18:10:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-06 18:10:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 73 proven. 135 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2021-12-06 18:10:30,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:30,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313839446] [2021-12-06 18:10:30,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313839446] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:30,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886224611] [2021-12-06 18:10:30,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:30,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:30,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:30,122 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:30,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:10:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:30,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 18:10:30,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 36 proven. 211 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2021-12-06 18:10:30,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 36 proven. 227 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-12-06 18:10:30,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886224611] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:30,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:30,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 15] total 26 [2021-12-06 18:10:30,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436844533] [2021-12-06 18:10:30,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:30,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-06 18:10:30,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:30,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-06 18:10:30,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2021-12-06 18:10:30,949 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand has 26 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 26 states have internal predecessors, (82), 20 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (32), 12 states have call predecessors, (32), 20 states have call successors, (32) [2021-12-06 18:10:31,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:31,274 INFO L93 Difference]: Finished difference Result 214 states and 372 transitions. [2021-12-06 18:10:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-06 18:10:31,275 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 26 states have internal predecessors, (82), 20 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (32), 12 states have call predecessors, (32), 20 states have call successors, (32) Word has length 148 [2021-12-06 18:10:31,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:31,276 INFO L225 Difference]: With dead ends: 214 [2021-12-06 18:10:31,276 INFO L226 Difference]: Without dead ends: 134 [2021-12-06 18:10:31,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=1285, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 18:10:31,278 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 108 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:31,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 313 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:10:31,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-12-06 18:10:31,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 114. [2021-12-06 18:10:31,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 77 states have (on average 1.2077922077922079) internal successors, (93), 78 states have internal predecessors, (93), 20 states have call successors, (20), 11 states have call predecessors, (20), 16 states have return successors, (56), 24 states have call predecessors, (56), 20 states have call successors, (56) [2021-12-06 18:10:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 169 transitions. [2021-12-06 18:10:31,288 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 169 transitions. Word has length 148 [2021-12-06 18:10:31,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:31,288 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 169 transitions. [2021-12-06 18:10:31,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 3.4166666666666665) internal successors, (82), 26 states have internal predecessors, (82), 20 states have call successors, (25), 1 states have call predecessors, (25), 10 states have return successors, (32), 12 states have call predecessors, (32), 20 states have call successors, (32) [2021-12-06 18:10:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 169 transitions. [2021-12-06 18:10:31,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-12-06 18:10:31,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:31,291 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 17, 16, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 8, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:31,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-06 18:10:31,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:31,492 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:31,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:31,493 INFO L85 PathProgramCache]: Analyzing trace with hash -399650163, now seen corresponding path program 2 times [2021-12-06 18:10:31,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:31,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274725947] [2021-12-06 18:10:31,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:31,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:10:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:31,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:10:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 18:10:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-06 18:10:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:10:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 18:10:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:31,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 169 proven. 360 refuted. 0 times theorem prover too weak. 1503 trivial. 0 not checked. [2021-12-06 18:10:31,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:31,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274725947] [2021-12-06 18:10:31,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274725947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:31,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834663517] [2021-12-06 18:10:31,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:10:31,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:31,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:31,879 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:31,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:10:31,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:10:31,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:10:31,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 18:10:31,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:32,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 79 proven. 543 refuted. 0 times theorem prover too weak. 1410 trivial. 0 not checked. [2021-12-06 18:10:32,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2032 backedges. 79 proven. 567 refuted. 0 times theorem prover too weak. 1386 trivial. 0 not checked. [2021-12-06 18:10:33,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834663517] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:33,279 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:33,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 17] total 27 [2021-12-06 18:10:33,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562721838] [2021-12-06 18:10:33,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:33,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 18:10:33,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:33,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 18:10:33,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:10:33,281 INFO L87 Difference]: Start difference. First operand 114 states and 169 transitions. Second operand has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 states have internal predecessors, (90), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (36), 14 states have call predecessors, (36), 21 states have call successors, (36) [2021-12-06 18:10:33,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:33,622 INFO L93 Difference]: Finished difference Result 260 states and 447 transitions. [2021-12-06 18:10:33,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-06 18:10:33,622 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 states have internal predecessors, (90), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (36), 14 states have call predecessors, (36), 21 states have call successors, (36) Word has length 271 [2021-12-06 18:10:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:33,624 INFO L225 Difference]: With dead ends: 260 [2021-12-06 18:10:33,624 INFO L226 Difference]: Without dead ends: 155 [2021-12-06 18:10:33,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 605 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=1553, Unknown=0, NotChecked=0, Total=1892 [2021-12-06 18:10:33,626 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 109 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:33,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 354 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:10:33,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-12-06 18:10:33,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 145. [2021-12-06 18:10:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 101 states have (on average 1.2376237623762376) internal successors, (125), 99 states have internal predecessors, (125), 26 states have call successors, (26), 18 states have call predecessors, (26), 17 states have return successors, (73), 27 states have call predecessors, (73), 26 states have call successors, (73) [2021-12-06 18:10:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 224 transitions. [2021-12-06 18:10:33,639 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 224 transitions. Word has length 271 [2021-12-06 18:10:33,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:33,640 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 224 transitions. [2021-12-06 18:10:33,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.4615384615384617) internal successors, (90), 27 states have internal predecessors, (90), 21 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (36), 14 states have call predecessors, (36), 21 states have call successors, (36) [2021-12-06 18:10:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 224 transitions. [2021-12-06 18:10:33,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-12-06 18:10:33,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:33,647 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 27, 27, 25, 23, 15, 15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 13, 12, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:33,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:10:33,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:33,848 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:33,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1123052726, now seen corresponding path program 3 times [2021-12-06 18:10:33,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:33,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039716723] [2021-12-06 18:10:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:33,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:33,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:10:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:10:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-06 18:10:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:34,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:10:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-06 18:10:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2021-12-06 18:10:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:34,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:10:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:10:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4429 backedges. 264 proven. 626 refuted. 0 times theorem prover too weak. 3539 trivial. 0 not checked. [2021-12-06 18:10:34,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:34,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039716723] [2021-12-06 18:10:34,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039716723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:34,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585815635] [2021-12-06 18:10:34,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:10:34,527 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:34,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:34,528 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:34,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:10:34,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 18:10:34,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:10:34,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 18:10:34,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4429 backedges. 434 proven. 4 refuted. 0 times theorem prover too weak. 3991 trivial. 0 not checked. [2021-12-06 18:10:34,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4429 backedges. 434 proven. 4 refuted. 0 times theorem prover too weak. 3991 trivial. 0 not checked. [2021-12-06 18:10:35,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585815635] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:35,477 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:35,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 19 [2021-12-06 18:10:35,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576724724] [2021-12-06 18:10:35,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:35,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-06 18:10:35,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:35,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-06 18:10:35,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-12-06 18:10:35,479 INFO L87 Difference]: Start difference. First operand 145 states and 224 transitions. Second operand has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 states have internal predecessors, (60), 8 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2021-12-06 18:10:35,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:35,604 INFO L93 Difference]: Finished difference Result 283 states and 457 transitions. [2021-12-06 18:10:35,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:10:35,605 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 states have internal predecessors, (60), 8 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) Word has length 394 [2021-12-06 18:10:35,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:35,606 INFO L225 Difference]: With dead ends: 283 [2021-12-06 18:10:35,607 INFO L226 Difference]: Without dead ends: 147 [2021-12-06 18:10:35,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 896 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-12-06 18:10:35,608 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 73 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:35,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 199 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:10:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-06 18:10:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-12-06 18:10:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 101 states have (on average 1.198019801980198) internal successors, (121), 98 states have internal predecessors, (121), 26 states have call successors, (26), 19 states have call predecessors, (26), 16 states have return successors, (66), 26 states have call predecessors, (66), 26 states have call successors, (66) [2021-12-06 18:10:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 213 transitions. [2021-12-06 18:10:35,616 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 213 transitions. Word has length 394 [2021-12-06 18:10:35,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:35,616 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 213 transitions. [2021-12-06 18:10:35,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 states have internal predecessors, (60), 8 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (22), 10 states have call predecessors, (22), 8 states have call successors, (22) [2021-12-06 18:10:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 213 transitions. [2021-12-06 18:10:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-12-06 18:10:35,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:35,620 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 36, 36, 33, 31, 21, 21, 21, 21, 21, 21, 21, 18, 18, 18, 18, 18, 18, 18, 15, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:35,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:10:35,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:35,821 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:35,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:35,822 INFO L85 PathProgramCache]: Analyzing trace with hash -2090861273, now seen corresponding path program 4 times [2021-12-06 18:10:35,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:35,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024377885] [2021-12-06 18:10:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:35,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:10:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:36,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:10:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:36,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:10:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:10:36,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-12-06 18:10:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:10:36,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:10:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:10:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2021-12-06 18:10:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:36,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:10:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:36,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 8577 backedges. 1090 proven. 942 refuted. 0 times theorem prover too weak. 6545 trivial. 0 not checked. [2021-12-06 18:10:36,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:36,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024377885] [2021-12-06 18:10:36,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024377885] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:36,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150482455] [2021-12-06 18:10:36,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:10:36,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:36,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:36,741 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:36,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:10:36,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:10:36,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:10:36,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 18:10:36,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8577 backedges. 490 proven. 1080 refuted. 0 times theorem prover too weak. 7007 trivial. 0 not checked. [2021-12-06 18:10:37,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:39,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8577 backedges. 492 proven. 1108 refuted. 0 times theorem prover too weak. 6977 trivial. 0 not checked. [2021-12-06 18:10:39,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150482455] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:39,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:39,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 19] total 42 [2021-12-06 18:10:39,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516637514] [2021-12-06 18:10:39,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:39,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 18:10:39,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:39,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 18:10:39,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-12-06 18:10:39,062 INFO L87 Difference]: Start difference. First operand 144 states and 213 transitions. Second operand has 42 states, 40 states have (on average 2.8) internal successors, (112), 42 states have internal predecessors, (112), 29 states have call successors, (36), 1 states have call predecessors, (36), 18 states have return successors, (48), 28 states have call predecessors, (48), 29 states have call successors, (48) [2021-12-06 18:10:39,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:39,706 INFO L93 Difference]: Finished difference Result 355 states and 619 transitions. [2021-12-06 18:10:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 18:10:39,707 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.8) internal successors, (112), 42 states have internal predecessors, (112), 29 states have call successors, (36), 1 states have call predecessors, (36), 18 states have return successors, (48), 28 states have call predecessors, (48), 29 states have call successors, (48) Word has length 542 [2021-12-06 18:10:39,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:39,709 INFO L225 Difference]: With dead ends: 355 [2021-12-06 18:10:39,709 INFO L226 Difference]: Without dead ends: 183 [2021-12-06 18:10:39,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1285 GetRequests, 1222 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=3371, Unknown=0, NotChecked=0, Total=3906 [2021-12-06 18:10:39,712 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 170 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:39,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 692 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 18:10:39,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-06 18:10:39,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 155. [2021-12-06 18:10:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 109 states have (on average 1.091743119266055) internal successors, (119), 106 states have internal predecessors, (119), 29 states have call successors, (29), 22 states have call predecessors, (29), 16 states have return successors, (42), 26 states have call predecessors, (42), 29 states have call successors, (42) [2021-12-06 18:10:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 190 transitions. [2021-12-06 18:10:39,720 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 190 transitions. Word has length 542 [2021-12-06 18:10:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:39,721 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 190 transitions. [2021-12-06 18:10:39,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.8) internal successors, (112), 42 states have internal predecessors, (112), 29 states have call successors, (36), 1 states have call predecessors, (36), 18 states have return successors, (48), 28 states have call predecessors, (48), 29 states have call successors, (48) [2021-12-06 18:10:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 190 transitions. [2021-12-06 18:10:39,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2021-12-06 18:10:39,723 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:39,723 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:39,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 18:10:39,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:39,924 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:39,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:39,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1387676979, now seen corresponding path program 5 times [2021-12-06 18:10:39,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:39,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424012478] [2021-12-06 18:10:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:39,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:39,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 18:10:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:40,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:10:40,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:10:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-06 18:10:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:40,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:10:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:40,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2021-12-06 18:10:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-06 18:10:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-06 18:10:40,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-06 18:10:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-06 18:10:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-06 18:10:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-06 18:10:40,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:10:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 1060 proven. 718 refuted. 0 times theorem prover too weak. 3591 trivial. 0 not checked. [2021-12-06 18:10:40,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:10:40,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424012478] [2021-12-06 18:10:40,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424012478] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:10:40,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94861935] [2021-12-06 18:10:40,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:10:40,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:10:40,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:10:40,588 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:10:40,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:10:40,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-12-06 18:10:40,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:10:40,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 881 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 18:10:40,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:10:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 918 proven. 135 refuted. 0 times theorem prover too weak. 4316 trivial. 0 not checked. [2021-12-06 18:10:41,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:10:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 5369 backedges. 920 proven. 137 refuted. 0 times theorem prover too weak. 4312 trivial. 0 not checked. [2021-12-06 18:10:41,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94861935] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:10:41,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:10:41,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 13, 15] total 41 [2021-12-06 18:10:41,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971671198] [2021-12-06 18:10:41,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:10:41,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-06 18:10:41,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:10:41,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-06 18:10:41,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2021-12-06 18:10:41,970 INFO L87 Difference]: Start difference. First operand 155 states and 190 transitions. Second operand has 41 states, 40 states have (on average 2.775) internal successors, (111), 41 states have internal predecessors, (111), 23 states have call successors, (35), 1 states have call predecessors, (35), 16 states have return successors, (45), 29 states have call predecessors, (45), 23 states have call successors, (45) [2021-12-06 18:10:42,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:10:42,358 INFO L93 Difference]: Finished difference Result 333 states and 423 transitions. [2021-12-06 18:10:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-06 18:10:42,359 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.775) internal successors, (111), 41 states have internal predecessors, (111), 23 states have call successors, (35), 1 states have call predecessors, (35), 16 states have return successors, (45), 29 states have call predecessors, (45), 23 states have call successors, (45) Word has length 433 [2021-12-06 18:10:42,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:10:42,360 INFO L225 Difference]: With dead ends: 333 [2021-12-06 18:10:42,361 INFO L226 Difference]: Without dead ends: 185 [2021-12-06 18:10:42,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1031 GetRequests, 977 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=416, Invalid=2446, Unknown=0, NotChecked=0, Total=2862 [2021-12-06 18:10:42,362 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 132 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:10:42,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 689 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:10:42,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-06 18:10:42,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 159. [2021-12-06 18:10:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 112 states have (on average 1.0535714285714286) internal successors, (118), 110 states have internal predecessors, (118), 30 states have call successors, (30), 23 states have call predecessors, (30), 16 states have return successors, (41), 25 states have call predecessors, (41), 30 states have call successors, (41) [2021-12-06 18:10:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 189 transitions. [2021-12-06 18:10:42,370 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 189 transitions. Word has length 433 [2021-12-06 18:10:42,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:10:42,371 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 189 transitions. [2021-12-06 18:10:42,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.775) internal successors, (111), 41 states have internal predecessors, (111), 23 states have call successors, (35), 1 states have call predecessors, (35), 16 states have return successors, (45), 29 states have call predecessors, (45), 23 states have call successors, (45) [2021-12-06 18:10:42,371 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 189 transitions. [2021-12-06 18:10:42,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2021-12-06 18:10:42,373 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:10:42,373 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:42,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 18:10:42,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-06 18:10:42,574 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:10:42,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:10:42,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1402769443, now seen corresponding path program 6 times [2021-12-06 18:10:42,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:10:42,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315507532] [2021-12-06 18:10:42,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:10:42,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:10:42,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 18:10:42,639 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 18:10:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 18:10:42,741 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 18:10:42,742 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-06 18:10:42,742 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-06 18:10:42,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-06 18:10:42,746 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:10:42,750 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-06 18:10:42,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 06:10:42 BoogieIcfgContainer [2021-12-06 18:10:42,832 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-06 18:10:42,832 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 18:10:42,832 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 18:10:42,832 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 18:10:42,833 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:10:23" (3/4) ... [2021-12-06 18:10:42,834 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-06 18:10:42,907 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 18:10:42,907 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 18:10:42,908 INFO L158 Benchmark]: Toolchain (without parser) took 19407.57ms. Allocated memory was 104.9MB in the beginning and 186.6MB in the end (delta: 81.8MB). Free memory was 68.8MB in the beginning and 59.2MB in the end (delta: 9.6MB). Peak memory consumption was 90.8MB. Max. memory is 16.1GB. [2021-12-06 18:10:42,908 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 104.9MB. Free memory is still 85.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 18:10:42,909 INFO L158 Benchmark]: CACSL2BoogieTranslator took 162.86ms. Allocated memory is still 104.9MB. Free memory was 68.7MB in the beginning and 81.4MB in the end (delta: -12.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 18:10:42,909 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.33ms. Allocated memory is still 104.9MB. Free memory was 81.2MB in the beginning and 79.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:10:42,909 INFO L158 Benchmark]: Boogie Preprocessor took 12.28ms. Allocated memory is still 104.9MB. Free memory was 79.9MB in the beginning and 78.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 18:10:42,910 INFO L158 Benchmark]: RCFGBuilder took 185.19ms. Allocated memory is still 104.9MB. Free memory was 78.7MB in the beginning and 69.5MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 18:10:42,910 INFO L158 Benchmark]: TraceAbstraction took 18945.33ms. Allocated memory was 104.9MB in the beginning and 186.6MB in the end (delta: 81.8MB). Free memory was 69.1MB in the beginning and 70.7MB in the end (delta: -1.6MB). Peak memory consumption was 82.9MB. Max. memory is 16.1GB. [2021-12-06 18:10:42,910 INFO L158 Benchmark]: Witness Printer took 75.54ms. Allocated memory is still 186.6MB. Free memory was 70.7MB in the beginning and 59.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-06 18:10:42,912 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 104.9MB. Free memory is still 85.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 162.86ms. Allocated memory is still 104.9MB. Free memory was 68.7MB in the beginning and 81.4MB in the end (delta: -12.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.33ms. Allocated memory is still 104.9MB. Free memory was 81.2MB in the beginning and 79.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.28ms. Allocated memory is still 104.9MB. Free memory was 79.9MB in the beginning and 78.7MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 185.19ms. Allocated memory is still 104.9MB. Free memory was 78.7MB in the beginning and 69.5MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 18945.33ms. Allocated memory was 104.9MB in the beginning and 186.6MB in the end (delta: 81.8MB). Free memory was 69.1MB in the beginning and 70.7MB in the end (delta: -1.6MB). Peak memory consumption was 82.9MB. Max. memory is 16.1GB. * Witness Printer took 75.54ms. Allocated memory is still 186.6MB. Free memory was 70.7MB in the beginning and 59.2MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 41]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L38] int x = 8; VAL [x=8] [L39] CALL, EXPR fibo1(x) VAL [\old(n)=8] [L10] COND FALSE !(n < 1) VAL [\old(n)=8, n=8] [L12] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=7] [L20] COND FALSE !(n < 1) VAL [\old(n)=7, n=7] [L22] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=6] [L10] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L12] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L20] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L22] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=5, fibo1(n-1)=3, n=5] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=5, fibo1(n-1)=3, fibo1(n-2)=2, n=5] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=6, fibo2(n-1)=5, n=6] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=6, fibo2(n-1)=5, fibo2(n-2)=3, n=6] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=7, fibo1(n-1)=8, n=7] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=7, fibo1(n-1)=8, fibo1(n-2)=5, n=7] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=8, fibo2(n-1)=13, n=8] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=6] [L20] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L22] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=3, fibo2(n-1)=1, n=3] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=4, fibo1(n-1)=2, n=4] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=5, fibo2(n-1)=3, n=5] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=6, fibo1(n-1)=5, n=6] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1, n=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, fibo2(n-1)=1, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0, n=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=3, fibo1(n-1)=1, n=3] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=4, fibo2(n-1)=2, n=4] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1, n=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, fibo1(n-1)=1, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0, n=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=4, fibo2(n-1)=2, fibo2(n-2)=1, n=4] [L15] return fibo2(n-1) + fibo2(n-2); [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=6, fibo1(n-1)=5, fibo1(n-2)=3, n=6] [L25] return fibo1(n-1) + fibo1(n-2); [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=8, fibo2(n-1)=13, fibo2(n-2)=8, n=8] [L15] return fibo2(n-1) + fibo2(n-2); [L39] RET, EXPR fibo1(x) VAL [fibo1(x)=21, x=8] [L39] int result = fibo1(x); [L40] COND TRUE result == 21 VAL [result=21, x=8] [L41] reach_error() VAL [result=21, x=8] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 18.8s, OverallIterations: 14, TraceHistogramMax: 43, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1040 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 972 mSDsluCounter, 3703 SdHoareTripleChecker+Invalid, 1.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3295 mSDsCounter, 1219 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5624 IncrementalHoareTripleChecker+Invalid, 6843 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1219 mSolverCounterUnsat, 408 mSDtfsCounter, 5624 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4962 GetRequests, 4594 SyntacticMatches, 15 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=159occurred in iteration=13, InterpolantAutomatonStates: 260, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 13 MinimizatonAttempts, 176 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 11.8s InterpolantComputationTime, 4585 NumberOfCodeBlocks, 4111 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 6142 ConstructedInterpolants, 0 QuantifiedInterpolants, 9012 SizeOfPredicates, 48 NumberOfNonLiveVariables, 3660 ConjunctsInSsa, 118 ConjunctsInUnsatCore, 35 InterpolantComputations, 2 PerfectInterpolantSequences, 56580/63747 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-06 18:10:42,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f2dbb38-0614-4518-bc10-339ade76673d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE