./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5cebeb76ad4442dbfc7818683322baaa88203ae05c49411b79170e1662f915e0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 22:46:20,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 22:46:20,541 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 22:46:20,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 22:46:20,596 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 22:46:20,601 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 22:46:20,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 22:46:20,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 22:46:20,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 22:46:20,617 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 22:46:20,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 22:46:20,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 22:46:20,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 22:46:20,623 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 22:46:20,625 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 22:46:20,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 22:46:20,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 22:46:20,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 22:46:20,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 22:46:20,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 22:46:20,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 22:46:20,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 22:46:20,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 22:46:20,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 22:46:20,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 22:46:20,659 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 22:46:20,659 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 22:46:20,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 22:46:20,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 22:46:20,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 22:46:20,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 22:46:20,666 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 22:46:20,668 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 22:46:20,669 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 22:46:20,670 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 22:46:20,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 22:46:20,671 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 22:46:20,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 22:46:20,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 22:46:20,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 22:46:20,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 22:46:20,674 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 22:46:20,720 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 22:46:20,723 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 22:46:20,724 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 22:46:20,724 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 22:46:20,731 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 22:46:20,731 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 22:46:20,731 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 22:46:20,732 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 22:46:20,732 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 22:46:20,732 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 22:46:20,733 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 22:46:20,734 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 22:46:20,734 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 22:46:20,734 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 22:46:20,734 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 22:46:20,735 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 22:46:20,735 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 22:46:20,735 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 22:46:20,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 22:46:20,736 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 22:46:20,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 22:46:20,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 22:46:20,737 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 22:46:20,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 22:46:20,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 22:46:20,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 22:46:20,740 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 22:46:20,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 22:46:20,740 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 22:46:20,740 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 22:46:20,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 22:46:20,741 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 22:46:20,741 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:46:20,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 22:46:20,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 22:46:20,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 22:46:20,742 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 22:46:20,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 22:46:20,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 22:46:20,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 22:46:20,743 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 22:46:20,744 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5cebeb76ad4442dbfc7818683322baaa88203ae05c49411b79170e1662f915e0 [2021-11-20 22:46:21,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 22:46:21,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 22:46:21,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 22:46:21,085 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 22:46:21,086 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 22:46:21,087 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i [2021-11-20 22:46:21,152 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/data/634b9e2c2/518195093baa4acb92214ff98ef225b9/FLAG1b9ef964b [2021-11-20 22:46:21,663 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 22:46:21,664 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i [2021-11-20 22:46:21,679 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/data/634b9e2c2/518195093baa4acb92214ff98ef225b9/FLAG1b9ef964b [2021-11-20 22:46:22,042 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/data/634b9e2c2/518195093baa4acb92214ff98ef225b9 [2021-11-20 22:46:22,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 22:46:22,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 22:46:22,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 22:46:22,061 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 22:46:22,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 22:46:22,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:46:22" (1/1) ... [2021-11-20 22:46:22,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d0e293e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:22, skipping insertion in model container [2021-11-20 22:46:22,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:46:22" (1/1) ... [2021-11-20 22:46:22,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 22:46:22,092 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 22:46:22,263 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_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i[817,830] [2021-11-20 22:46:22,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:46:23,869 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 22:46:23,881 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_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/sv-benchmarks/c/array-industry-pattern/array_of_struct_loop_dep.i[817,830] [2021-11-20 22:46:23,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 22:46:23,900 INFO L208 MainTranslator]: Completed translation [2021-11-20 22:46:23,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:23 WrapperNode [2021-11-20 22:46:23,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 22:46:23,902 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 22:46:23,902 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 22:46:23,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 22:46:23,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:23" (1/1) ... [2021-11-20 22:46:23,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:23" (1/1) ... [2021-11-20 22:46:23,933 INFO L137 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2021-11-20 22:46:23,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 22:46:23,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 22:46:23,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 22:46:23,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 22:46:23,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:23" (1/1) ... [2021-11-20 22:46:23,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:23" (1/1) ... [2021-11-20 22:46:23,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:23" (1/1) ... [2021-11-20 22:46:23,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:23" (1/1) ... [2021-11-20 22:46:23,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:23" (1/1) ... [2021-11-20 22:46:23,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:23" (1/1) ... [2021-11-20 22:46:23,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:23" (1/1) ... [2021-11-20 22:46:23,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 22:46:23,955 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 22:46:23,955 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 22:46:23,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 22:46:23,957 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:23" (1/1) ... [2021-11-20 22:46:23,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 22:46:23,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:23,997 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 22:46:24,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 22:46:24,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 22:46:24,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 22:46:24,046 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 22:46:24,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 22:46:24,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 22:46:24,046 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 22:46:24,119 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 22:46:24,121 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 22:46:24,284 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 22:46:24,306 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 22:46:24,306 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 22:46:24,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:46:24 BoogieIcfgContainer [2021-11-20 22:46:24,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 22:46:24,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 22:46:24,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 22:46:24,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 22:46:24,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:46:22" (1/3) ... [2021-11-20 22:46:24,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6dacd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:46:24, skipping insertion in model container [2021-11-20 22:46:24,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:46:23" (2/3) ... [2021-11-20 22:46:24,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6dacd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:46:24, skipping insertion in model container [2021-11-20 22:46:24,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:46:24" (3/3) ... [2021-11-20 22:46:24,334 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_loop_dep.i [2021-11-20 22:46:24,339 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 22:46:24,339 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 22:46:24,399 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 22:46:24,406 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 22:46:24,407 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 22:46:24,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:24,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 22:46:24,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:24,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 22:46:24,434 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:24,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:24,444 INFO L85 PathProgramCache]: Analyzing trace with hash 77510321, now seen corresponding path program 1 times [2021-11-20 22:46:24,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:24,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567027979] [2021-11-20 22:46:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:24,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:24,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:24,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:24,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567027979] [2021-11-20 22:46:24,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567027979] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 22:46:24,637 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 22:46:24,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 22:46:24,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957437596] [2021-11-20 22:46:24,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 22:46:24,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 22:46:24,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:24,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 22:46:24,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:46:24,680 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:24,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:24,732 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2021-11-20 22:46:24,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 22:46:24,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2021-11-20 22:46:24,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:24,744 INFO L225 Difference]: With dead ends: 20 [2021-11-20 22:46:24,744 INFO L226 Difference]: Without dead ends: 13 [2021-11-20 22:46:24,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 22:46:24,752 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:24,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:46:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-20 22:46:24,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 8. [2021-11-20 22:46:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:24,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-20 22:46:24,790 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 5 [2021-11-20 22:46:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:24,790 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-20 22:46:24,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:24,791 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-20 22:46:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 22:46:24,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:24,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 22:46:24,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 22:46:24,792 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:24,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:24,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1900342786, now seen corresponding path program 1 times [2021-11-20 22:46:24,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:24,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824637688] [2021-11-20 22:46:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:24,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:24,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:24,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:24,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824637688] [2021-11-20 22:46:24,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824637688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:46:24,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714447402] [2021-11-20 22:46:24,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:24,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:24,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:24,866 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:46:24,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 22:46:24,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:24,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 22:46:24,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:46:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:25,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:46:25,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:25,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714447402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:46:25,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1491675311] [2021-11-20 22:46:25,058 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-20 22:46:25,059 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:46:25,063 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:46:25,068 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:46:25,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:46:25,219 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 22 treesize of output 22 [2021-11-20 22:46:25,291 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 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-20 22:46:25,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:25,447 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 0 case distinctions, treesize of input 173 treesize of output 163 [2021-11-20 22:46:25,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:26,000 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:46:26,120 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:46:26,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:46:26,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-20 22:46:26,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875284632] [2021-11-20 22:46:26,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:46:26,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 22:46:26,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:26,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 22:46:26,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:46:26,132 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:26,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:26,188 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-11-20 22:46:26,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 22:46:26,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 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 6 [2021-11-20 22:46:26,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:26,190 INFO L225 Difference]: With dead ends: 32 [2021-11-20 22:46:26,190 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 22:46:26,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2021-11-20 22:46:26,192 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:26,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 12 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 22:46:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 22:46:26,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 11. [2021-11-20 22:46:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:26,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-20 22:46:26,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-11-20 22:46:26,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:26,202 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-20 22:46:26,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:26,202 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-20 22:46:26,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 22:46:26,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:26,203 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1] [2021-11-20 22:46:26,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 22:46:26,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:26,423 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:26,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:26,424 INFO L85 PathProgramCache]: Analyzing trace with hash -696147471, now seen corresponding path program 2 times [2021-11-20 22:46:26,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:26,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9864967] [2021-11-20 22:46:26,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:26,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:26,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:26,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9864967] [2021-11-20 22:46:26,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9864967] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:46:26,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746213392] [2021-11-20 22:46:26,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:46:26,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:26,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:26,505 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:46:26,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 22:46:26,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 22:46:26,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:46:26,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 22:46:26,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:46:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:26,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:46:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:26,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746213392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:46:26,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2029660304] [2021-11-20 22:46:26,707 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-20 22:46:26,707 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:46:26,707 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:46:26,707 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:46:26,708 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:46:26,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-11-20 22:46:26,834 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 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-20 22:46:26,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:26,908 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 0 case distinctions, treesize of input 173 treesize of output 163 [2021-11-20 22:46:27,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:27,306 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:46:27,411 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:46:27,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:46:27,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2021-11-20 22:46:27,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671593915] [2021-11-20 22:46:27,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:46:27,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-20 22:46:27,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:27,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-20 22:46:27,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2021-11-20 22:46:27,413 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:27,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:27,492 INFO L93 Difference]: Finished difference Result 68 states and 75 transitions. [2021-11-20 22:46:27,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 22:46:27,493 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 22:46:27,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:27,494 INFO L225 Difference]: With dead ends: 68 [2021-11-20 22:46:27,494 INFO L226 Difference]: Without dead ends: 63 [2021-11-20 22:46:27,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=147, Unknown=0, NotChecked=0, Total=272 [2021-11-20 22:46:27,496 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:27,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 30 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:46:27,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-20 22:46:27,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 17. [2021-11-20 22:46:27,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-11-20 22:46:27,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 9 [2021-11-20 22:46:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:27,503 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-11-20 22:46:27,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-11-20 22:46:27,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-20 22:46:27,504 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:27,504 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1] [2021-11-20 22:46:27,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 22:46:27,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:27,727 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:27,728 INFO L85 PathProgramCache]: Analyzing trace with hash 525645521, now seen corresponding path program 3 times [2021-11-20 22:46:27,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:27,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21989225] [2021-11-20 22:46:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:27,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:27,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:27,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21989225] [2021-11-20 22:46:27,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21989225] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:46:27,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178593440] [2021-11-20 22:46:27,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 22:46:27,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:27,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:27,870 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:46:27,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 22:46:27,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 22:46:27,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:46:27,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 22:46:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:46:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:27,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:46:28,179 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:28,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178593440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:46:28,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896859122] [2021-11-20 22:46:28,196 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-20 22:46:28,196 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:46:28,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:46:28,197 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:46:28,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:46:28,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2021-11-20 22:46:28,268 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 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-20 22:46:28,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:28,364 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 0 case distinctions, treesize of input 173 treesize of output 163 [2021-11-20 22:46:28,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:28,744 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:46:28,861 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:46:28,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:46:28,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2021-11-20 22:46:28,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595465601] [2021-11-20 22:46:28,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:46:28,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 22:46:28,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:28,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 22:46:28,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2021-11-20 22:46:28,864 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:29,085 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2021-11-20 22:46:29,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 22:46:29,086 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-20 22:46:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:29,090 INFO L225 Difference]: With dead ends: 140 [2021-11-20 22:46:29,090 INFO L226 Difference]: Without dead ends: 135 [2021-11-20 22:46:29,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=383, Invalid=429, Unknown=0, NotChecked=0, Total=812 [2021-11-20 22:46:29,094 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 348 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:29,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 69 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 22:46:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-20 22:46:29,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 29. [2021-11-20 22:46:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-20 22:46:29,115 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 15 [2021-11-20 22:46:29,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:29,116 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-20 22:46:29,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-20 22:46:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 22:46:29,118 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:29,118 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1] [2021-11-20 22:46:29,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 22:46:29,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:29,345 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:29,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:29,345 INFO L85 PathProgramCache]: Analyzing trace with hash 393701521, now seen corresponding path program 4 times [2021-11-20 22:46:29,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:29,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741761280] [2021-11-20 22:46:29,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:29,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:29,770 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741761280] [2021-11-20 22:46:29,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741761280] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:46:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731397340] [2021-11-20 22:46:29,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 22:46:29,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:29,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:29,777 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:46:29,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 22:46:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:29,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 22:46:29,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:46:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:29,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:46:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:30,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731397340] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:46:30,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1508256292] [2021-11-20 22:46:30,755 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-20 22:46:30,756 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:46:30,756 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:46:30,756 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:46:30,756 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:46:30,771 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 22 treesize of output 22 [2021-11-20 22:46:30,820 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 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-20 22:46:30,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:46:30,906 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 0 case distinctions, treesize of input 173 treesize of output 163 [2021-11-20 22:46:31,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:46:31,369 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:46:31,491 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:46:31,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:46:31,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2021-11-20 22:46:31,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251589749] [2021-11-20 22:46:31,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:46:31,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 22:46:31,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:46:31,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 22:46:31,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 22:46:31,499 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:46:31,965 INFO L93 Difference]: Finished difference Result 284 states and 309 transitions. [2021-11-20 22:46:31,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 22:46:31,966 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 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 27 [2021-11-20 22:46:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:46:31,969 INFO L225 Difference]: With dead ends: 284 [2021-11-20 22:46:31,969 INFO L226 Difference]: Without dead ends: 279 [2021-11-20 22:46:31,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1331, Invalid=1425, Unknown=0, NotChecked=0, Total=2756 [2021-11-20 22:46:31,972 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 564 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 22:46:31,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 138 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 22:46:31,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-20 22:46:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 53. [2021-11-20 22:46:31,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:31,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-11-20 22:46:31,988 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 27 [2021-11-20 22:46:31,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:46:31,989 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-11-20 22:46:31,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:46:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-11-20 22:46:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-20 22:46:31,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:46:31,992 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1] [2021-11-20 22:46:32,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-20 22:46:32,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:32,206 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:46:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:46:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash 569830417, now seen corresponding path program 5 times [2021-11-20 22:46:32,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:46:32,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718000705] [2021-11-20 22:46:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:46:32,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:46:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:46:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:46:33,275 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:46:33,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718000705] [2021-11-20 22:46:33,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718000705] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:46:33,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921747136] [2021-11-20 22:46:33,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:46:33,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:46:33,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:46:33,285 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:46:33,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 22:47:34,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-11-20 22:47:34,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:47:35,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-20 22:47:35,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:47:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:47:35,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:47:38,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:47:38,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921747136] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:47:38,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [528585201] [2021-11-20 22:47:38,015 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-20 22:47:38,015 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:47:38,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:47:38,016 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:47:38,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:47:38,042 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 22 treesize of output 22 [2021-11-20 22:47:38,093 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 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-20 22:47:38,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:38,179 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 0 case distinctions, treesize of input 173 treesize of output 163 [2021-11-20 22:47:38,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:47:38,571 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:47:38,698 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:47:38,698 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:47:38,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2021-11-20 22:47:38,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958008982] [2021-11-20 22:47:38,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:47:38,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-20 22:47:38,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:38,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-20 22:47:38,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4955, Invalid=5145, Unknown=0, NotChecked=0, Total=10100 [2021-11-20 22:47:38,707 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:47:41,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:47:41,022 INFO L93 Difference]: Finished difference Result 572 states and 621 transitions. [2021-11-20 22:47:41,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-20 22:47:41,023 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-20 22:47:41,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:47:41,028 INFO L225 Difference]: With dead ends: 572 [2021-11-20 22:47:41,028 INFO L226 Difference]: Without dead ends: 567 [2021-11-20 22:47:41,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4955, Invalid=5145, Unknown=0, NotChecked=0, Total=10100 [2021-11-20 22:47:41,034 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 1756 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 22:47:41,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1756 Valid, 285 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 22:47:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-20 22:47:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 101. [2021-11-20 22:47:41,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:47:41,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-11-20 22:47:41,053 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 51 [2021-11-20 22:47:41,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:47:41,053 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-11-20 22:47:41,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 96 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:47:41,054 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-11-20 22:47:41,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-20 22:47:41,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:47:41,059 INFO L514 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1] [2021-11-20 22:47:41,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 22:47:41,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 22:47:41,260 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:47:41,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:47:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash -836865263, now seen corresponding path program 6 times [2021-11-20 22:47:41,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:47:41,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757846529] [2021-11-20 22:47:41,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:47:41,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:47:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:47:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:47:44,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:47:44,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757846529] [2021-11-20 22:47:44,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757846529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:47:44,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597354498] [2021-11-20 22:47:44,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 22:47:44,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:47:44,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:47:44,837 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:47:44,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 22:47:44,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 22:47:44,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 22:47:44,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-20 22:47:44,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:47:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:47:45,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:47:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:47:55,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597354498] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:47:55,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1623090949] [2021-11-20 22:47:55,334 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-20 22:47:55,335 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:47:55,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:47:55,335 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:47:55,335 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:47:55,374 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 22 treesize of output 22 [2021-11-20 22:47:55,411 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 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-20 22:47:55,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:47:55,472 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 0 case distinctions, treesize of input 178 treesize of output 168 [2021-11-20 22:47:55,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:47:55,859 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:47:55,990 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:47:55,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:47:55,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2021-11-20 22:47:55,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553522848] [2021-11-20 22:47:55,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:47:55,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-11-20 22:47:55,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:47:55,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-11-20 22:47:56,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19115, Invalid=19497, Unknown=0, NotChecked=0, Total=38612 [2021-11-20 22:47:56,007 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:48:18,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:48:18,786 INFO L93 Difference]: Finished difference Result 1148 states and 1245 transitions. [2021-11-20 22:48:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-11-20 22:48:18,787 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-20 22:48:18,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:48:18,795 INFO L225 Difference]: With dead ends: 1148 [2021-11-20 22:48:18,796 INFO L226 Difference]: Without dead ends: 1143 [2021-11-20 22:48:18,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=19115, Invalid=19497, Unknown=0, NotChecked=0, Total=38612 [2021-11-20 22:48:18,803 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3064 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3064 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 22:48:18,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3064 Valid, 570 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [867 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-20 22:48:18,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-11-20 22:48:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 197. [2021-11-20 22:48:18,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:48:18,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-11-20 22:48:18,832 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 99 [2021-11-20 22:48:18,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:48:18,833 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-11-20 22:48:18,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0207253886010363) internal successors, (197), 192 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:48:18,834 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-11-20 22:48:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-20 22:48:18,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:48:18,838 INFO L514 BasicCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1] [2021-11-20 22:48:18,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 22:48:19,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:19,061 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:48:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:48:19,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1257275119, now seen corresponding path program 7 times [2021-11-20 22:48:19,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:48:19,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801694805] [2021-11-20 22:48:19,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:48:19,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:48:19,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:33,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:48:33,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801694805] [2021-11-20 22:48:33,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801694805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:48:33,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912543872] [2021-11-20 22:48:33,778 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 22:48:33,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:48:33,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:48:33,779 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:48:33,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 22:48:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:48:33,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 192 conjunts are in the unsatisfiable core [2021-11-20 22:48:33,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 22:48:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:48:34,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 22:49:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:49:15,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912543872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 22:49:15,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1230618776] [2021-11-20 22:49:15,859 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-11-20 22:49:15,859 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 22:49:15,860 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 22:49:15,860 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 22:49:15,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 22:49:15,890 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 22 treesize of output 22 [2021-11-20 22:49:15,942 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 0 case distinctions, treesize of input 32 treesize of output 28 [2021-11-20 22:49:16,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 22:49:16,033 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 0 case distinctions, treesize of input 173 treesize of output 163 [2021-11-20 22:49:16,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-20 22:49:16,385 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 22:49:16,585 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 22:49:16,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 22:49:16,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2021-11-20 22:49:16,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423509661] [2021-11-20 22:49:16,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 22:49:16,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2021-11-20 22:49:16,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 22:49:16,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2021-11-20 22:49:16,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75083, Invalid=75849, Unknown=0, NotChecked=0, Total=150932 [2021-11-20 22:49:16,621 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:01,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 22:55:01,748 INFO L93 Difference]: Finished difference Result 2300 states and 2493 transitions. [2021-11-20 22:55:01,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-11-20 22:55:01,749 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 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 195 [2021-11-20 22:55:01,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 22:55:01,763 INFO L225 Difference]: With dead ends: 2300 [2021-11-20 22:55:01,763 INFO L226 Difference]: Without dead ends: 2295 [2021-11-20 22:55:01,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3626 ImplicationChecksByTransitivity, 54.6s TimeCoverageRelationStatistics Valid=75083, Invalid=75849, Unknown=0, NotChecked=0, Total=150932 [2021-11-20 22:55:01,776 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 8664 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 2364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8664 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 3514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2364 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 22:55:01,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8664 Valid, 1146 Invalid, 3514 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2364 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-20 22:55:01,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2021-11-20 22:55:01,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 389. [2021-11-20 22:55:01,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 388 states have (on average 1.0051546391752577) internal successors, (390), 388 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 390 transitions. [2021-11-20 22:55:01,818 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 390 transitions. Word has length 195 [2021-11-20 22:55:01,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 22:55:01,819 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 390 transitions. [2021-11-20 22:55:01,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.0103896103896104) internal successors, (389), 384 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 22:55:01,820 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 390 transitions. [2021-11-20 22:55:01,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2021-11-20 22:55:01,829 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 22:55:01,829 INFO L514 BasicCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1] [2021-11-20 22:55:01,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 22:55:02,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:02,049 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 22:55:02,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 22:55:02,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1299815697, now seen corresponding path program 8 times [2021-11-20 22:55:02,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 22:55:02,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110183615] [2021-11-20 22:55:02,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 22:55:02,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 22:55:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 22:55:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 22:55:50,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 22:55:50,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110183615] [2021-11-20 22:55:50,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110183615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 22:55:50,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438209568] [2021-11-20 22:55:50,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 22:55:50,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 22:55:50,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 22:55:50,741 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 22:55:50,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43ee3cf2-dd4b-4b6f-9caf-d4b606f0a6f1/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process