./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/sina1.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_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/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_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/sina1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/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_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/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 b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:40:11,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:40:11,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:40:11,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:40:11,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:40:11,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:40:11,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:40:11,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:40:11,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:40:11,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:40:11,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:40:11,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:40:11,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:40:11,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:40:11,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:40:11,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:40:11,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:40:11,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:40:11,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:40:11,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:40:11,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:40:11,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:40:11,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:40:11,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:40:11,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:40:11,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:40:11,832 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:40:11,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:40:11,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:40:11,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:40:11,835 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:40:11,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:40:11,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:40:11,837 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:40:11,838 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:40:11,838 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:40:11,838 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:40:11,838 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:40:11,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:40:11,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:40:11,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:40:11,840 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 21:40:11,864 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:40:11,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:40:11,864 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:40:11,864 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:40:11,865 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:40:11,865 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:40:11,865 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:40:11,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:40:11,865 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:40:11,866 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:40:11,866 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:40:11,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:40:11,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:40:11,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:40:11,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 21:40:11,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:40:11,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 21:40:11,867 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:40:11,867 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 21:40:11,867 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:40:11,867 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 21:40:11,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:40:11,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:40:11,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:40:11,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:40:11,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:40:11,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:40:11,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 21:40:11,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:40:11,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:40:11,868 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 21:40:11,868 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 21:40:11,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 21:40:11,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:40:11,869 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_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf [2021-12-06 21:40:12,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:40:12,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:40:12,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:40:12,077 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:40:12,078 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:40:12,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-fpi/sina1.c [2021-12-06 21:40:12,117 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/data/fb5c43d1b/c7428939e3554a1a81248c4f85b55cba/FLAGd04d33533 [2021-12-06 21:40:12,501 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:40:12,501 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/sv-benchmarks/c/array-fpi/sina1.c [2021-12-06 21:40:12,506 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/data/fb5c43d1b/c7428939e3554a1a81248c4f85b55cba/FLAGd04d33533 [2021-12-06 21:40:12,520 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/data/fb5c43d1b/c7428939e3554a1a81248c4f85b55cba [2021-12-06 21:40:12,522 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:40:12,523 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:40:12,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:40:12,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:40:12,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:40:12,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:40:12" (1/1) ... [2021-12-06 21:40:12,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@251c8f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:12, skipping insertion in model container [2021-12-06 21:40:12,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:40:12" (1/1) ... [2021-12-06 21:40:12,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:40:12,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:40:12,648 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_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2021-12-06 21:40:12,661 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:40:12,666 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:40:12,675 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_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/sv-benchmarks/c/array-fpi/sina1.c[588,601] [2021-12-06 21:40:12,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:40:12,690 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:40:12,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:12 WrapperNode [2021-12-06 21:40:12,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:40:12,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:40:12,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:40:12,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:40:12,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:12" (1/1) ... [2021-12-06 21:40:12,702 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:12" (1/1) ... [2021-12-06 21:40:12,717 INFO L137 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2021-12-06 21:40:12,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:40:12,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:40:12,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:40:12,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:40:12,724 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:12" (1/1) ... [2021-12-06 21:40:12,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:12" (1/1) ... [2021-12-06 21:40:12,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:12" (1/1) ... [2021-12-06 21:40:12,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:12" (1/1) ... [2021-12-06 21:40:12,733 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:12" (1/1) ... [2021-12-06 21:40:12,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:12" (1/1) ... [2021-12-06 21:40:12,738 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:12" (1/1) ... [2021-12-06 21:40:12,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:40:12,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:40:12,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:40:12,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:40:12,743 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:12" (1/1) ... [2021-12-06 21:40:12,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:40:12,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:12,772 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:40:12,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:40:12,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:40:12,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:40:12,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 21:40:12,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 21:40:12,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 21:40:12,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:40:12,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:40:12,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 21:40:12,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 21:40:12,853 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:40:12,854 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:40:12,939 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:40:12,943 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:40:12,943 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 21:40:12,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:40:12 BoogieIcfgContainer [2021-12-06 21:40:12,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:40:12,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:40:12,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:40:12,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:40:12,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:40:12" (1/3) ... [2021-12-06 21:40:12,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fadc5a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:40:12, skipping insertion in model container [2021-12-06 21:40:12,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:40:12" (2/3) ... [2021-12-06 21:40:12,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fadc5a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:40:12, skipping insertion in model container [2021-12-06 21:40:12,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:40:12" (3/3) ... [2021-12-06 21:40:12,951 INFO L111 eAbstractionObserver]: Analyzing ICFG sina1.c [2021-12-06 21:40:12,955 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:40:12,955 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 21:40:12,990 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:40:12,996 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 21:40:12,996 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 21:40:13,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:13,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 21:40:13,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:13,013 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:13,013 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:13,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:13,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-12-06 21:40:13,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:13,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115546758] [2021-12-06 21:40:13,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:13,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:13,161 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 21:40:13,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:13,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115546758] [2021-12-06 21:40:13,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115546758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:40:13,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:40:13,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:40:13,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115865795] [2021-12-06 21:40:13,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:40:13,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 21:40:13,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:13,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 21:40:13,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:40:13,202 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:13,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:13,214 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-12-06 21:40:13,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:40:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 21:40:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:13,221 INFO L225 Difference]: With dead ends: 38 [2021-12-06 21:40:13,221 INFO L226 Difference]: Without dead ends: 17 [2021-12-06 21:40:13,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:40:13,226 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:13,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:40:13,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-06 21:40:13,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-06 21:40:13,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:13,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-12-06 21:40:13,251 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-12-06 21:40:13,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:13,251 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-12-06 21:40:13,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:13,251 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-12-06 21:40:13,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-06 21:40:13,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:13,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:13,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:40:13,252 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:13,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:13,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-12-06 21:40:13,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:13,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272278197] [2021-12-06 21:40:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:13,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:13,313 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 21:40:13,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:13,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272278197] [2021-12-06 21:40:13,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272278197] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:40:13,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:40:13,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:40:13,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596424934] [2021-12-06 21:40:13,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:40:13,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 21:40:13,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:13,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 21:40:13,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:40:13,316 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:13,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:13,354 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-12-06 21:40:13,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 21:40:13,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-06 21:40:13,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:13,355 INFO L225 Difference]: With dead ends: 37 [2021-12-06 21:40:13,356 INFO L226 Difference]: Without dead ends: 27 [2021-12-06 21:40:13,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 21:40:13,357 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:13,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:40:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-06 21:40:13,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-12-06 21:40:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-12-06 21:40:13,362 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-12-06 21:40:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:13,362 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-12-06 21:40:13,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:13,363 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-12-06 21:40:13,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-06 21:40:13,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:13,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:13,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:40:13,364 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:13,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:13,364 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-12-06 21:40:13,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:13,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210849186] [2021-12-06 21:40:13,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:13,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:13,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:13,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210849186] [2021-12-06 21:40:13,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210849186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:13,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626013776] [2021-12-06 21:40:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:13,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:13,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:13,666 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:13,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:40:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:13,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 21:40:13,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:13,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:40:13,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 21:40:13,911 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-12-06 21:40:13,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2021-12-06 21:40:13,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-12-06 21:40:14,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:14,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:20,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:20,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626013776] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:20,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:20,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2021-12-06 21:40:20,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385017664] [2021-12-06 21:40:20,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:20,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-06 21:40:20,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:20,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-06 21:40:20,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=336, Unknown=3, NotChecked=0, Total=420 [2021-12-06 21:40:20,162 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:20,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:20,391 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2021-12-06 21:40:20,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 21:40:20,391 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-06 21:40:20,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:20,392 INFO L225 Difference]: With dead ends: 41 [2021-12-06 21:40:20,392 INFO L226 Difference]: Without dead ends: 39 [2021-12-06 21:40:20,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=259, Invalid=794, Unknown=3, NotChecked=0, Total=1056 [2021-12-06 21:40:20,394 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:20,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 99 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 190 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2021-12-06 21:40:20,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-06 21:40:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-12-06 21:40:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:20,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-06 21:40:20,399 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2021-12-06 21:40:20,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:20,399 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-06 21:40:20,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:20,399 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-06 21:40:20,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 21:40:20,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:20,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:20,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:40:20,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:20,601 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:20,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:20,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 2 times [2021-12-06 21:40:20,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:20,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823013495] [2021-12-06 21:40:20,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:20,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:20,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:20,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823013495] [2021-12-06 21:40:20,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823013495] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:20,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763755450] [2021-12-06 21:40:20,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:40:20,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:20,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:20,653 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:20,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 21:40:20,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:40:20,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:20,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 21:40:20,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:20,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:20,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763755450] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:20,775 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:20,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-06 21:40:20,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908633277] [2021-12-06 21:40:20,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:20,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 21:40:20,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:20,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 21:40:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:40:20,777 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:20,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:20,870 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2021-12-06 21:40:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:40:20,870 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-06 21:40:20,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:20,871 INFO L225 Difference]: With dead ends: 58 [2021-12-06 21:40:20,871 INFO L226 Difference]: Without dead ends: 51 [2021-12-06 21:40:20,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-12-06 21:40:20,872 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:20,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 81 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:40:20,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-06 21:40:20,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2021-12-06 21:40:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:20,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-12-06 21:40:20,877 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2021-12-06 21:40:20,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:20,877 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-12-06 21:40:20,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:20,878 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-12-06 21:40:20,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 21:40:20,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:20,878 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:20,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 21:40:21,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:21,079 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:21,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:21,080 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2021-12-06 21:40:21,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:21,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824208664] [2021-12-06 21:40:21,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:21,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:40:21,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:21,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824208664] [2021-12-06 21:40:21,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824208664] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:21,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519358792] [2021-12-06 21:40:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:21,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:21,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:21,141 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:21,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 21:40:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:21,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 21:40:21,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:21,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:40:21,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:40:21,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519358792] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:21,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:21,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-12-06 21:40:21,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93808369] [2021-12-06 21:40:21,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:21,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 21:40:21,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:21,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 21:40:21,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-12-06 21:40:21,251 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:21,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:21,300 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-12-06 21:40:21,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:40:21,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 21:40:21,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:21,301 INFO L225 Difference]: With dead ends: 58 [2021-12-06 21:40:21,301 INFO L226 Difference]: Without dead ends: 37 [2021-12-06 21:40:21,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-12-06 21:40:21,303 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:21,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 52 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:40:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-06 21:40:21,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2021-12-06 21:40:21,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:21,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-06 21:40:21,308 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2021-12-06 21:40:21,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:21,308 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-06 21:40:21,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:21,308 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-06 21:40:21,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-06 21:40:21,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:21,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:21,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 21:40:21,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:21,511 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:21,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:21,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2021-12-06 21:40:21,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:21,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008250393] [2021-12-06 21:40:21,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:21,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:21,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:21,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:21,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008250393] [2021-12-06 21:40:21,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008250393] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:21,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809597434] [2021-12-06 21:40:21,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:40:21,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:21,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:21,781 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:21,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 21:40:21,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 21:40:21,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:21,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 21:40:21,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:21,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 21:40:21,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:40:21,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 21:40:21,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 21:40:22,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2021-12-06 21:40:22,075 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 21:40:22,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2021-12-06 21:40:22,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-12-06 21:40:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:22,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:40:38,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809597434] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:38,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:38,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2021-12-06 21:40:38,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802275896] [2021-12-06 21:40:38,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:38,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 21:40:38,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:38,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 21:40:38,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=892, Unknown=26, NotChecked=0, Total=1056 [2021-12-06 21:40:38,530 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:41,421 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse1 (select .cse0 0))) (and (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) 2) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0)) (not (= (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 4 |c_ULTIMATE.start_main_~i~0#1|)) 0)) (<= c_~N~0 .cse1) (<= .cse1 c_~N~0) (< 1 c_~N~0) (<= c_~N~0 2) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (and (not (= |ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= 2 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))))))) is different from false [2021-12-06 21:40:41,806 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0)) (<= c_~N~0 .cse0) (<= .cse0 c_~N~0))) is different from false [2021-12-06 21:40:42,187 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 2) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0)) (< 1 c_~N~0) (<= c_~N~0 2) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (and (not (= |ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= 2 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))))) is different from false [2021-12-06 21:40:42,567 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) 0))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0)) (not (= (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* 4 |c_ULTIMATE.start_main_~i~0#1|)) 0)) (<= c_~N~0 .cse0) (<= .cse0 c_~N~0))) is different from false [2021-12-06 21:40:43,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:43,041 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-12-06 21:40:43,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 21:40:43,042 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-06 21:40:43,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:43,042 INFO L225 Difference]: With dead ends: 48 [2021-12-06 21:40:43,042 INFO L226 Difference]: Without dead ends: 46 [2021-12-06 21:40:43,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=252, Invalid=1535, Unknown=35, NotChecked=340, Total=2162 [2021-12-06 21:40:43,044 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:43,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 94 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 117 Unchecked, 0.0s Time] [2021-12-06 21:40:43,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-12-06 21:40:43,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2021-12-06 21:40:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-12-06 21:40:43,049 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2021-12-06 21:40:43,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:43,049 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-12-06 21:40:43,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 33 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:43,049 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-12-06 21:40:43,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 21:40:43,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:43,050 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:43,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 21:40:43,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-06 21:40:43,251 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:43,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:43,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 2 times [2021-12-06 21:40:43,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:43,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813831320] [2021-12-06 21:40:43,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:43,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:43,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:43,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813831320] [2021-12-06 21:40:43,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813831320] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:43,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353561870] [2021-12-06 21:40:43,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 21:40:43,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:43,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:43,865 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:43,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 21:40:43,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 21:40:43,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:43,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 21:40:43,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:43,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 21:40:43,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:40:43,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 21:40:44,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:44,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-12-06 21:40:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:40:44,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:44,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:40:44,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353561870] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:44,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:44,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 11] total 35 [2021-12-06 21:40:44,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135612259] [2021-12-06 21:40:44,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:44,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-06 21:40:44,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:44,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-06 21:40:44,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-12-06 21:40:44,625 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:49,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:49,193 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2021-12-06 21:40:49,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-06 21:40:49,194 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 21:40:49,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:49,194 INFO L225 Difference]: With dead ends: 64 [2021-12-06 21:40:49,194 INFO L226 Difference]: Without dead ends: 62 [2021-12-06 21:40:49,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=400, Invalid=3022, Unknown=0, NotChecked=0, Total=3422 [2021-12-06 21:40:49,196 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 36 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:49,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 72 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 297 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2021-12-06 21:40:49,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-06 21:40:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 49. [2021-12-06 21:40:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:49,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2021-12-06 21:40:49,203 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 24 [2021-12-06 21:40:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:49,203 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2021-12-06 21:40:49,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:49,204 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2021-12-06 21:40:49,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 21:40:49,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:49,204 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:49,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 21:40:49,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:49,405 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:49,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:49,405 INFO L85 PathProgramCache]: Analyzing trace with hash -900609774, now seen corresponding path program 4 times [2021-12-06 21:40:49,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:49,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614492447] [2021-12-06 21:40:49,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:49,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:49,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:49,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614492447] [2021-12-06 21:40:49,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614492447] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:49,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120061534] [2021-12-06 21:40:49,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:40:49,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:49,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:49,454 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:49,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 21:40:49,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:40:49,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:49,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 21:40:49,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:49,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:40:49,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:40:49,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120061534] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:49,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:49,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2021-12-06 21:40:49,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679807953] [2021-12-06 21:40:49,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:49,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-06 21:40:49,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:49,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-06 21:40:49,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-12-06 21:40:49,572 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:49,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:49,643 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2021-12-06 21:40:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 21:40:49,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 21:40:49,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:49,644 INFO L225 Difference]: With dead ends: 97 [2021-12-06 21:40:49,644 INFO L226 Difference]: Without dead ends: 57 [2021-12-06 21:40:49,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-12-06 21:40:49,645 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:49,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 87 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:40:49,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-12-06 21:40:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 38. [2021-12-06 21:40:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:49,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-12-06 21:40:49,650 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 24 [2021-12-06 21:40:49,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:49,650 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-12-06 21:40:49,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:49,651 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-12-06 21:40:49,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 21:40:49,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:49,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:49,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 21:40:49,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-06 21:40:49,852 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:49,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:49,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 5 times [2021-12-06 21:40:49,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:49,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078339923] [2021-12-06 21:40:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:49,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:50,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:50,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078339923] [2021-12-06 21:40:50,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078339923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:50,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836506596] [2021-12-06 21:40:50,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 21:40:50,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:50,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:50,240 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:50,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 21:40:50,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 21:40:50,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:50,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 21:40:50,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:50,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:40:50,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 21:40:50,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 21:40:50,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-12-06 21:40:50,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:40:50,509 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:40:50,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2021-12-06 21:40:50,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:50,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 21:40:50,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:40:50,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 21:40:50,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2021-12-06 21:40:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:50,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:51,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836506596] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:51,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:51,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 18] total 49 [2021-12-06 21:40:51,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294454931] [2021-12-06 21:40:51,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:51,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-06 21:40:51,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:51,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-06 21:40:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=2053, Unknown=0, NotChecked=0, Total=2352 [2021-12-06 21:40:51,326 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:52,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:52,909 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2021-12-06 21:40:52,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-12-06 21:40:52,910 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-12-06 21:40:52,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:52,911 INFO L225 Difference]: With dead ends: 100 [2021-12-06 21:40:52,911 INFO L226 Difference]: Without dead ends: 98 [2021-12-06 21:40:52,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1353, Invalid=7019, Unknown=0, NotChecked=0, Total=8372 [2021-12-06 21:40:52,913 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 204 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:52,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 253 Invalid, 868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 453 Invalid, 0 Unknown, 203 Unchecked, 0.2s Time] [2021-12-06 21:40:52,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-06 21:40:52,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 38. [2021-12-06 21:40:52,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-06 21:40:52,919 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 24 [2021-12-06 21:40:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:52,919 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-06 21:40:52,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-06 21:40:52,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 21:40:52,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:52,920 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:52,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 21:40:53,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 21:40:53,122 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:53,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:53,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1146912830, now seen corresponding path program 3 times [2021-12-06 21:40:53,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:53,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776603230] [2021-12-06 21:40:53,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:53,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:53,546 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:53,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:53,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776603230] [2021-12-06 21:40:53,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776603230] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:53,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866687715] [2021-12-06 21:40:53,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 21:40:53,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:53,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:53,548 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:53,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 21:40:53,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-06 21:40:53,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:53,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-06 21:40:53,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:53,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 21:40:53,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 21:40:53,707 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-06 21:40:53,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 31 [2021-12-06 21:40:54,278 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-12-06 21:40:54,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 34 [2021-12-06 21:40:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:40:54,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:55,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:40:55,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 108 [2021-12-06 21:40:55,948 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 21:40:55,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 505 treesize of output 465 [2021-12-06 21:40:55,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 242 [2021-12-06 21:40:56,594 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-12-06 21:40:56,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 505 treesize of output 461 [2021-12-06 21:40:56,906 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-06 21:40:56,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866687715] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:56,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:56,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 15] total 46 [2021-12-06 21:40:56,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330739102] [2021-12-06 21:40:56,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:56,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 21:40:56,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:56,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 21:40:56,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1795, Unknown=1, NotChecked=0, Total=2070 [2021-12-06 21:40:56,908 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:58,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:58,100 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2021-12-06 21:40:58,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-06 21:40:58,100 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 21:40:58,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:58,101 INFO L225 Difference]: With dead ends: 69 [2021-12-06 21:40:58,101 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 21:40:58,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1689 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=673, Invalid=5178, Unknown=1, NotChecked=0, Total=5852 [2021-12-06 21:40:58,103 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:58,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 158 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 408 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2021-12-06 21:40:58,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 21:40:58,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-12-06 21:40:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.1) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:58,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2021-12-06 21:40:58,110 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 32 [2021-12-06 21:40:58,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:58,110 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2021-12-06 21:40:58,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.673913043478261) internal successors, (77), 46 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2021-12-06 21:40:58,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 21:40:58,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:58,111 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:58,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 21:40:58,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:58,313 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:58,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:58,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1680698556, now seen corresponding path program 4 times [2021-12-06 21:40:58,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:58,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677465456] [2021-12-06 21:40:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:58,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:40:58,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:58,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677465456] [2021-12-06 21:40:58,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677465456] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:58,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232788627] [2021-12-06 21:40:58,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 21:40:58,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:58,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:58,386 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:58,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 21:40:58,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 21:40:58,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:58,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-06 21:40:58,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:40:58,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-06 21:40:58,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232788627] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:58,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:58,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2021-12-06 21:40:58,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210316483] [2021-12-06 21:40:58,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:58,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 21:40:58,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:58,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 21:40:58,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-12-06 21:40:58,523 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:58,609 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2021-12-06 21:40:58,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 21:40:58,609 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-06 21:40:58,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:58,610 INFO L225 Difference]: With dead ends: 112 [2021-12-06 21:40:58,610 INFO L226 Difference]: Without dead ends: 67 [2021-12-06 21:40:58,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-12-06 21:40:58,611 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 88 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:58,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 71 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:40:58,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-06 21:40:58,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2021-12-06 21:40:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:58,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-12-06 21:40:58,617 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 32 [2021-12-06 21:40:58,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:58,617 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-12-06 21:40:58,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 18 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:58,617 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-12-06 21:40:58,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 21:40:58,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:58,618 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:58,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-06 21:40:58,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 21:40:58,820 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:58,821 INFO L85 PathProgramCache]: Analyzing trace with hash 351176898, now seen corresponding path program 5 times [2021-12-06 21:40:58,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:58,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082786659] [2021-12-06 21:40:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:58,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:40:58,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:58,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082786659] [2021-12-06 21:40:58,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082786659] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:58,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039680655] [2021-12-06 21:40:58,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 21:40:58,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:58,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:58,913 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:58,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 21:40:58,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-06 21:40:58,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:40:58,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 21:40:58,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:40:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:40:59,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:40:59,084 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 21:40:59,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039680655] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:40:59,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 21:40:59,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-06 21:40:59,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20847399] [2021-12-06 21:40:59,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 21:40:59,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 21:40:59,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:40:59,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 21:40:59,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-06 21:40:59,086 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:59,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:40:59,186 INFO L93 Difference]: Finished difference Result 107 states and 113 transitions. [2021-12-06 21:40:59,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 21:40:59,186 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-06 21:40:59,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:40:59,187 INFO L225 Difference]: With dead ends: 107 [2021-12-06 21:40:59,187 INFO L226 Difference]: Without dead ends: 93 [2021-12-06 21:40:59,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-12-06 21:40:59,188 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 133 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:40:59,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 111 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:40:59,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-06 21:40:59,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2021-12-06 21:40:59,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:59,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-12-06 21:40:59,196 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 34 [2021-12-06 21:40:59,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:40:59,196 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-12-06 21:40:59,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:40:59,196 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-12-06 21:40:59,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-06 21:40:59,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:40:59,197 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:40:59,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-06 21:40:59,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:59,398 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 21:40:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:40:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1226631488, now seen corresponding path program 6 times [2021-12-06 21:40:59,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:40:59,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363993404] [2021-12-06 21:40:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:40:59,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:40:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:40:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:40:59,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:40:59,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363993404] [2021-12-06 21:40:59,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363993404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:40:59,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902781782] [2021-12-06 21:40:59,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 21:40:59,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:40:59,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:40:59,974 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:40:59,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1fa4de5-0ef7-48be-9675-8d4d9dce3d40/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 21:41:00,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 21:41:00,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 21:41:00,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 53 conjunts are in the unsatisfiable core [2021-12-06 21:41:00,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:41:00,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 21:41:00,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:41:00,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-12-06 21:41:00,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:00,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2021-12-06 21:41:00,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:00,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:00,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:00,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2021-12-06 21:41:00,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:00,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:00,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:00,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 41 [2021-12-06 21:41:00,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:41:00,400 INFO L354 Elim1Store]: treesize reduction 42, result has 40.8 percent of original size [2021-12-06 21:41:00,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 53