./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_init3_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init3_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl --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 e3a23c39a71f68ea97a16f1ff860e4af783e55492bb64ac88412e1e3f7ca41d5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:41:21,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:41:21,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:41:21,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:41:21,722 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:41:21,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:41:21,726 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:41:21,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:41:21,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:41:21,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:41:21,736 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:41:21,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:41:21,738 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:41:21,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:41:21,742 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:41:21,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:41:21,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:41:21,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:41:21,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:41:21,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:41:21,756 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:41:21,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:41:21,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:41:21,762 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:41:21,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:41:21,767 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:41:21,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:41:21,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:41:21,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:41:21,771 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:41:21,772 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:41:21,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:41:21,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:41:21,776 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:41:21,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:41:21,778 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:41:21,779 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:41:21,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:41:21,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:41:21,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:41:21,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:41:21,784 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:41:21,823 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:41:21,824 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:41:21,825 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:41:21,825 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:41:21,826 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:41:21,826 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:41:21,827 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:41:21,827 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:41:21,827 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:41:21,828 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:41:21,829 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:41:21,829 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:41:21,829 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:41:21,830 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:41:21,830 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:41:21,830 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:41:21,831 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:41:21,831 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:41:21,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:41:21,832 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:41:21,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:41:21,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:41:21,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:41:21,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:41:21,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:41:21,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:41:21,834 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:41:21,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:41:21,834 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:41:21,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:41:21,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:41:21,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:41:21,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:41:21,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:41:21,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:41:21,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:41:21,837 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:41:21,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:41:21,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:41:21,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:41:21,838 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:41:21,838 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_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3a23c39a71f68ea97a16f1ff860e4af783e55492bb64ac88412e1e3f7ca41d5 [2021-11-23 17:41:22,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:41:22,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:41:22,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:41:22,157 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:41:22,158 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:41:22,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-examples/standard_init3_ground-2.i [2021-11-23 17:41:22,230 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/data/52cfe7720/4cc81da0ef70488e942c474d2cf307b4/FLAG07da4e7ac [2021-11-23 17:41:22,813 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:41:22,815 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/sv-benchmarks/c/array-examples/standard_init3_ground-2.i [2021-11-23 17:41:22,825 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/data/52cfe7720/4cc81da0ef70488e942c474d2cf307b4/FLAG07da4e7ac [2021-11-23 17:41:23,127 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/data/52cfe7720/4cc81da0ef70488e942c474d2cf307b4 [2021-11-23 17:41:23,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:41:23,132 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:41:23,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:41:23,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:41:23,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:41:23,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:41:23" (1/1) ... [2021-11-23 17:41:23,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@228df2fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:23, skipping insertion in model container [2021-11-23 17:41:23,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:41:23" (1/1) ... [2021-11-23 17:41:23,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:41:23,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:41:23,391 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_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/sv-benchmarks/c/array-examples/standard_init3_ground-2.i[816,829] [2021-11-23 17:41:23,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:41:23,415 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:41:23,428 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_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/sv-benchmarks/c/array-examples/standard_init3_ground-2.i[816,829] [2021-11-23 17:41:23,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:41:23,450 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:41:23,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:23 WrapperNode [2021-11-23 17:41:23,451 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:41:23,452 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:41:23,453 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:41:23,453 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:41:23,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:23" (1/1) ... [2021-11-23 17:41:23,474 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:23" (1/1) ... [2021-11-23 17:41:23,514 INFO L137 Inliner]: procedures = 15, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2021-11-23 17:41:23,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:41:23,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:41:23,517 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:41:23,517 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:41:23,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:23" (1/1) ... [2021-11-23 17:41:23,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:23" (1/1) ... [2021-11-23 17:41:23,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:23" (1/1) ... [2021-11-23 17:41:23,546 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:23" (1/1) ... [2021-11-23 17:41:23,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:23" (1/1) ... [2021-11-23 17:41:23,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:23" (1/1) ... [2021-11-23 17:41:23,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:23" (1/1) ... [2021-11-23 17:41:23,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:41:23,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:41:23,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:41:23,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:41:23,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:23" (1/1) ... [2021-11-23 17:41:23,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:41:23,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:23,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:41:23,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:41:23,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:41:23,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:41:23,661 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:41:23,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:41:23,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:41:23,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:41:23,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:41:23,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:41:23,726 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:41:23,727 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:41:23,852 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:41:23,869 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:41:23,875 INFO L158 Benchmark]: Toolchain (without parser) took 740.86ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 60.6MB in the beginning and 62.1MB in the end (delta: -1.5MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2021-11-23 17:41:23,876 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 81.8MB. Free memory was 58.5MB in the beginning and 58.5MB in the end (delta: 39.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:41:23,878 INFO L158 Benchmark]: CACSL2BoogieTranslator took 317.82ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 60.4MB in the beginning and 74.6MB in the end (delta: -14.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:41:23,879 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.01ms. Allocated memory is still 98.6MB. Free memory was 74.5MB in the beginning and 73.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:41:23,881 INFO L158 Benchmark]: Boogie Preprocessor took 61.88ms. Allocated memory is still 98.6MB. Free memory was 73.0MB in the beginning and 71.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:41:23,882 INFO L158 Benchmark]: RCFGBuilder took 292.85ms. Allocated memory is still 98.6MB. Free memory was 71.9MB in the beginning and 62.1MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:41:23,889 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 81.8MB. Free memory was 58.5MB in the beginning and 58.5MB in the end (delta: 39.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 317.82ms. Allocated memory was 81.8MB in the beginning and 98.6MB in the end (delta: 16.8MB). Free memory was 60.4MB in the beginning and 74.6MB in the end (delta: -14.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.01ms. Allocated memory is still 98.6MB. Free memory was 74.5MB in the beginning and 73.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 61.88ms. Allocated memory is still 98.6MB. Free memory was 73.0MB in the beginning and 71.9MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 292.85ms. Allocated memory is still 98.6MB. Free memory was 71.9MB in the beginning and 62.1MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:41:23,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_init3_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl --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 e3a23c39a71f68ea97a16f1ff860e4af783e55492bb64ac88412e1e3f7ca41d5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:41:26,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:41:26,711 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:41:26,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:41:26,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:41:26,788 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:41:26,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:41:26,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:41:26,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:41:26,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:41:26,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:41:26,812 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:41:26,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:41:26,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:41:26,819 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:41:26,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:41:26,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:41:26,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:41:26,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:41:26,840 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:41:26,843 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:41:26,844 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:41:26,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:41:26,851 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:41:26,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:41:26,861 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:41:26,861 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:41:26,864 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:41:26,864 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:41:26,866 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:41:26,866 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:41:26,867 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:41:26,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:41:26,871 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:41:26,872 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:41:26,873 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:41:26,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:41:26,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:41:26,882 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:41:26,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:41:26,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:41:26,886 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:41:26,938 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:41:26,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:41:26,939 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:41:26,939 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:41:26,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:41:26,941 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:41:26,941 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:41:26,941 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:41:26,942 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:41:26,943 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:41:26,944 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:41:26,945 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:41:26,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:41:26,947 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:41:26,948 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:41:26,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:41:26,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:41:26,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:41:26,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:41:26,949 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:41:26,949 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:41:26,949 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:41:26,950 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:41:26,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:41:26,950 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:41:26,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:41:26,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:41:26,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:41:26,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:41:26,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:41:26,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:41:26,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:41:26,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:41:26,953 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:41:26,954 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:26,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:41:26,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:41:26,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:41:26,955 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3a23c39a71f68ea97a16f1ff860e4af783e55492bb64ac88412e1e3f7ca41d5 [2021-11-23 17:41:27,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:41:27,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:41:27,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:41:27,381 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:41:27,382 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:41:27,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-examples/standard_init3_ground-2.i [2021-11-23 17:41:27,458 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/data/2ce3f8787/1810f2bd13c34b7ca93699fc3b87aca8/FLAGc378ba1f2 [2021-11-23 17:41:28,118 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:41:28,121 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/sv-benchmarks/c/array-examples/standard_init3_ground-2.i [2021-11-23 17:41:28,129 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/data/2ce3f8787/1810f2bd13c34b7ca93699fc3b87aca8/FLAGc378ba1f2 [2021-11-23 17:41:28,451 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/data/2ce3f8787/1810f2bd13c34b7ca93699fc3b87aca8 [2021-11-23 17:41:28,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:41:28,459 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:41:28,463 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:41:28,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:41:28,468 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:41:28,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:41:28" (1/1) ... [2021-11-23 17:41:28,471 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6656bc40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:28, skipping insertion in model container [2021-11-23 17:41:28,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:41:28" (1/1) ... [2021-11-23 17:41:28,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:41:28,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:41:28,720 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_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/sv-benchmarks/c/array-examples/standard_init3_ground-2.i[816,829] [2021-11-23 17:41:28,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:41:28,747 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:41:28,762 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_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/sv-benchmarks/c/array-examples/standard_init3_ground-2.i[816,829] [2021-11-23 17:41:28,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:41:28,818 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:41:28,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:28 WrapperNode [2021-11-23 17:41:28,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:41:28,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:41:28,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:41:28,837 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:41:28,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:28" (1/1) ... [2021-11-23 17:41:28,867 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:28" (1/1) ... [2021-11-23 17:41:28,893 INFO L137 Inliner]: procedures = 17, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2021-11-23 17:41:28,893 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:41:28,894 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:41:28,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:41:28,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:41:28,904 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:28" (1/1) ... [2021-11-23 17:41:28,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:28" (1/1) ... [2021-11-23 17:41:28,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:28" (1/1) ... [2021-11-23 17:41:28,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:28" (1/1) ... [2021-11-23 17:41:28,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:28" (1/1) ... [2021-11-23 17:41:28,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:28" (1/1) ... [2021-11-23 17:41:28,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:28" (1/1) ... [2021-11-23 17:41:28,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:41:28,933 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:41:28,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:41:28,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:41:28,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:28" (1/1) ... [2021-11-23 17:41:28,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:41:28,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:28,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:41:28,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:41:29,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:41:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:41:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:41:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 17:41:29,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:41:29,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:41:29,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:41:29,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 17:41:29,114 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:41:29,116 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:41:29,311 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:41:29,317 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:41:29,318 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-23 17:41:29,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:41:29 BoogieIcfgContainer [2021-11-23 17:41:29,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:41:29,322 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:41:29,322 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:41:29,326 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:41:29,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:41:28" (1/3) ... [2021-11-23 17:41:29,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af4656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:41:29, skipping insertion in model container [2021-11-23 17:41:29,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:41:28" (2/3) ... [2021-11-23 17:41:29,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1af4656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:41:29, skipping insertion in model container [2021-11-23 17:41:29,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:41:29" (3/3) ... [2021-11-23 17:41:29,330 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init3_ground-2.i [2021-11-23 17:41:29,336 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:41:29,337 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:41:29,403 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:41:29,420 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 [2021-11-23 17:41:29,421 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:41:29,450 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:29,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:41:29,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:29,460 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:29,460 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:29,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:29,469 INFO L85 PathProgramCache]: Analyzing trace with hash -93359874, now seen corresponding path program 1 times [2021-11-23 17:41:29,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:29,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2006855839] [2021-11-23 17:41:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:29,486 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:29,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:29,494 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:29,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:41:29,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:29,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:41:29,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:29,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:41:29,800 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:29,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2006855839] [2021-11-23 17:41:29,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2006855839] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:41:29,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:41:29,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:41:29,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569715037] [2021-11-23 17:41:29,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:41:29,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:41:29,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:41:29,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:41:29,858 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 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 3.6666666666666665) internal successors, (11), 3 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) [2021-11-23 17:41:29,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:29,925 INFO L93 Difference]: Finished difference Result 36 states and 56 transitions. [2021-11-23 17:41:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:41:29,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 11 [2021-11-23 17:41:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:29,938 INFO L225 Difference]: With dead ends: 36 [2021-11-23 17:41:29,939 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 17:41:29,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:41:29,953 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:29,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:41:29,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 17:41:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 17:41:29,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:29,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-23 17:41:30,001 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2021-11-23 17:41:30,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:30,002 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-23 17:41:30,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-11-23 17:41:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-23 17:41:30,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 17:41:30,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:30,006 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:30,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:30,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:41:30,220 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:30,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:30,221 INFO L85 PathProgramCache]: Analyzing trace with hash -168681064, now seen corresponding path program 1 times [2021-11-23 17:41:30,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:30,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589855844] [2021-11-23 17:41:30,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:30,223 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:30,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:30,225 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:30,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:41:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:30,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:41:30,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:41:30,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:41:30,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:30,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589855844] [2021-11-23 17:41:30,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589855844] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:30,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [450501124] [2021-11-23 17:41:30,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:30,415 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:30,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:41:30,421 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:41:30,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 17:41:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:30,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:41:30,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:41:30,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:41:30,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [450501124] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:30,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236637028] [2021-11-23 17:41:30,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:30,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:30,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:30,638 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:41:30,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 17:41:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:30,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:41:30,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:30,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:41:30,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 17:41:30,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236637028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:30,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:41:30,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-23 17:41:30,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352995311] [2021-11-23 17:41:30,824 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:41:30,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:41:30,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:30,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:41:30,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:41:30,841 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-11-23 17:41:30,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:30,988 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2021-11-23 17:41:30,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:41:30,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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 14 [2021-11-23 17:41:30,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:30,990 INFO L225 Difference]: With dead ends: 39 [2021-11-23 17:41:30,990 INFO L226 Difference]: Without dead ends: 26 [2021-11-23 17:41:30,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:41:30,993 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:30,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:41:30,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-23 17:41:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-11-23 17:41:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 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) [2021-11-23 17:41:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-11-23 17:41:31,016 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 14 [2021-11-23 17:41:31,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:31,017 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-11-23 17:41:31,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 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) [2021-11-23 17:41:31,017 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-11-23 17:41:31,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 17:41:31,019 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:31,019 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:31,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:31,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:31,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:31,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:31,620 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:31,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:31,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1736848510, now seen corresponding path program 2 times [2021-11-23 17:41:31,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:31,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1446112153] [2021-11-23 17:41:31,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:41:31,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:31,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:31,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:31,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:41:31,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:41:31,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:31,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:41:31,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 17:41:31,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 17:41:32,042 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:32,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1446112153] [2021-11-23 17:41:32,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1446112153] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:32,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1770952227] [2021-11-23 17:41:32,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:41:32,043 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:32,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:41:32,045 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:41:32,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:41:32,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:41:32,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:32,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:41:32,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 17:41:32,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 17:41:32,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1770952227] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:32,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59795037] [2021-11-23 17:41:32,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:41:32,373 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:32,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:32,379 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:41:32,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 17:41:32,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:41:32,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:32,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:41:32,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 17:41:32,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 17:41:32,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59795037] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:32,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:41:32,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-23 17:41:32,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176884485] [2021-11-23 17:41:32,645 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:41:32,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 17:41:32,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:32,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 17:41:32,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:41:32,652 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:33,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:33,193 INFO L93 Difference]: Finished difference Result 63 states and 86 transitions. [2021-11-23 17:41:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:41:33,196 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 17:41:33,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:33,197 INFO L225 Difference]: With dead ends: 63 [2021-11-23 17:41:33,197 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 17:41:33,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:41:33,199 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:33,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:41:33,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 17:41:33,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-23 17:41:33,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-11-23 17:41:33,222 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 23 [2021-11-23 17:41:33,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:33,222 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-11-23 17:41:33,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:33,223 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-11-23 17:41:33,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 17:41:33,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:33,232 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:33,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:33,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:33,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 17:41:33,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:33,835 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:33,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:33,835 INFO L85 PathProgramCache]: Analyzing trace with hash -468119106, now seen corresponding path program 3 times [2021-11-23 17:41:33,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:33,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [497647211] [2021-11-23 17:41:33,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:41:33,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:33,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:33,844 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:33,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:41:34,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 17:41:34,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:34,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:41:34,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 17:41:34,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 17:41:34,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:34,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [497647211] [2021-11-23 17:41:34,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [497647211] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:34,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [437172953] [2021-11-23 17:41:34,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:41:34,858 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:34,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:41:34,860 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:41:34,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:41:35,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 17:41:35,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:35,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:41:35,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 17:41:35,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 17:41:36,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [437172953] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:36,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529824864] [2021-11-23 17:41:36,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:41:36,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:36,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:36,513 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:41:36,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 17:41:41,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-23 17:41:41,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:41,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:41:41,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 17:41:41,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 17:41:42,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529824864] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:42,000 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:41:42,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 34 [2021-11-23 17:41:42,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824996753] [2021-11-23 17:41:42,001 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:41:42,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 17:41:42,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:42,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 17:41:42,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=771, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 17:41:42,004 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:44,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:44,632 INFO L93 Difference]: Finished difference Result 111 states and 152 transitions. [2021-11-23 17:41:44,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 17:41:44,640 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-23 17:41:44,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:44,642 INFO L225 Difference]: With dead ends: 111 [2021-11-23 17:41:44,642 INFO L226 Difference]: Without dead ends: 80 [2021-11-23 17:41:44,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=671, Invalid=1309, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 17:41:44,645 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 70 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:44,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 112 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 17:41:44,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-23 17:41:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-11-23 17:41:44,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2021-11-23 17:41:44,662 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 41 [2021-11-23 17:41:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:44,662 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2021-11-23 17:41:44,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:44,663 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2021-11-23 17:41:44,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:41:44,666 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:44,666 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:44,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:44,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-23 17:41:45,115 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:45,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:45,285 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:45,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:45,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1058733118, now seen corresponding path program 4 times [2021-11-23 17:41:45,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:45,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1586713743] [2021-11-23 17:41:45,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:41:45,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:45,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:45,288 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:45,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:41:45,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:41:45,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:45,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:41:45,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-23 17:41:45,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-23 17:41:47,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:47,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1586713743] [2021-11-23 17:41:47,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1586713743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:47,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1510868251] [2021-11-23 17:41:47,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:41:47,577 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:47,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:41:47,581 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:41:47,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:41:48,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:41:48,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:48,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:41:48,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:48,170 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-23 17:41:48,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-23 17:41:48,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1510868251] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:48,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818012124] [2021-11-23 17:41:48,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:41:48,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:41:48,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:41:48,367 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:41:48,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 17:41:48,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:41:48,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:41:48,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:41:48,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:48,777 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-23 17:41:48,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:41:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2021-11-23 17:41:49,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818012124] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:41:49,016 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:41:49,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 25, 25] total 48 [2021-11-23 17:41:49,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917482177] [2021-11-23 17:41:49,017 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:41:49,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 17:41:49,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:49,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 17:41:49,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 17:41:49,022 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 48 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:58,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:58,366 INFO L93 Difference]: Finished difference Result 207 states and 284 transitions. [2021-11-23 17:41:58,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 17:41:58,367 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 17:41:58,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:58,369 INFO L225 Difference]: With dead ends: 207 [2021-11-23 17:41:58,369 INFO L226 Difference]: Without dead ends: 152 [2021-11-23 17:41:58,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2021-11-23 17:41:58,373 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1797 mSolverCounterSat, 1153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 2950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1153 IncrementalHoareTripleChecker+Valid, 1797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:58,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 206 Invalid, 2950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1153 Valid, 1797 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 17:41:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-23 17:41:58,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-11-23 17:41:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2021-11-23 17:41:58,394 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 77 [2021-11-23 17:41:58,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:58,395 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2021-11-23 17:41:58,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:41:58,395 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2021-11-23 17:41:58,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-23 17:41:58,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:58,398 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:41:58,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:58,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:58,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:59,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:41:59,024 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:59,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:59,024 INFO L85 PathProgramCache]: Analyzing trace with hash -99643074, now seen corresponding path program 5 times [2021-11-23 17:41:59,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:59,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913487835] [2021-11-23 17:41:59,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:41:59,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:59,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:59,029 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:59,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:42:01,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-23 17:42:01,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:42:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 723 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 17:42:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2021-11-23 17:42:02,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2021-11-23 17:42:10,295 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:42:10,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913487835] [2021-11-23 17:42:10,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913487835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:10,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1505471384] [2021-11-23 17:42:10,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:42:10,296 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:42:10,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:42:10,299 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:42:10,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 17:44:50,385 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 17:44:50,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728538659] [2021-11-23 17:44:50,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:44:50,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:44:50,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:44:50,405 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:44:50,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 17:44:50,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f1cbabd2-5fa1-4ddb-8e0f-c4bfb57a48b5/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 1