./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/scalar_loopdep.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_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/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_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/scalar_loopdep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/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_fa5f48da-cf19-4570-8504-68088196b5f0/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 004e76a55ea43180d22836854efb5ff40e4c49966cf8226e42027e9f69007914 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:25:59,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:25:59,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:25:59,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:25:59,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:25:59,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:25:59,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:25:59,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:25:59,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:25:59,651 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:25:59,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:25:59,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:25:59,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:25:59,661 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:25:59,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:25:59,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:25:59,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:25:59,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:25:59,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:25:59,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:25:59,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:25:59,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:25:59,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:25:59,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:25:59,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:25:59,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:25:59,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:25:59,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:25:59,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:25:59,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:25:59,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:25:59,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:25:59,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:25:59,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:25:59,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:25:59,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:25:59,694 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:25:59,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:25:59,695 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:25:59,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:25:59,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:25:59,699 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:25:59,735 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:25:59,737 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:25:59,737 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:25:59,738 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:25:59,742 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:25:59,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:25:59,742 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:25:59,743 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:25:59,743 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:25:59,743 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:25:59,743 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:25:59,743 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:25:59,744 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:25:59,744 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:25:59,744 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:25:59,744 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:25:59,744 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:25:59,745 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:25:59,745 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:25:59,746 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:25:59,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:25:59,746 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:25:59,746 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:25:59,746 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:25:59,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:25:59,747 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:25:59,747 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:25:59,747 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:25:59,748 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:25:59,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:25:59,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:25:59,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:25:59,748 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:25:59,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:25:59,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:25:59,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:25:59,749 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:25:59,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:25:59,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:25:59,750 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:25:59,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:25:59,755 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_fa5f48da-cf19-4570-8504-68088196b5f0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 004e76a55ea43180d22836854efb5ff40e4c49966cf8226e42027e9f69007914 [2021-11-23 17:26:00,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:26:00,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:26:00,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:26:00,102 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:26:00,103 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:26:00,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-lopstr16/scalar_loopdep.i [2021-11-23 17:26:00,164 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/data/76f06dca3/eee4dd5b46524d55a3b21963d74a0310/FLAG5a7fad836 [2021-11-23 17:26:00,761 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:26:00,762 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i [2021-11-23 17:26:00,773 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/data/76f06dca3/eee4dd5b46524d55a3b21963d74a0310/FLAG5a7fad836 [2021-11-23 17:26:01,120 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/data/76f06dca3/eee4dd5b46524d55a3b21963d74a0310 [2021-11-23 17:26:01,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:26:01,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:26:01,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:26:01,132 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:26:01,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:26:01,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:26:01" (1/1) ... [2021-11-23 17:26:01,149 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b08754 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:01, skipping insertion in model container [2021-11-23 17:26:01,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:26:01" (1/1) ... [2021-11-23 17:26:01,159 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:26:01,176 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:26:01,382 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_fa5f48da-cf19-4570-8504-68088196b5f0/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i[807,820] [2021-11-23 17:26:01,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:26:02,919 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:26:02,933 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_fa5f48da-cf19-4570-8504-68088196b5f0/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i[807,820] [2021-11-23 17:26:02,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:26:02,958 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:26:02,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:02 WrapperNode [2021-11-23 17:26:02,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:26:02,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:26:02,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:26:02,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:26:02,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:02" (1/1) ... [2021-11-23 17:26:02,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:02" (1/1) ... [2021-11-23 17:26:03,003 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2021-11-23 17:26:03,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:26:03,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:26:03,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:26:03,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:26:03,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:02" (1/1) ... [2021-11-23 17:26:03,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:02" (1/1) ... [2021-11-23 17:26:03,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:02" (1/1) ... [2021-11-23 17:26:03,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:02" (1/1) ... [2021-11-23 17:26:03,041 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:02" (1/1) ... [2021-11-23 17:26:03,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:02" (1/1) ... [2021-11-23 17:26:03,048 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:02" (1/1) ... [2021-11-23 17:26:03,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:26:03,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:26:03,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:26:03,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:26:03,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:02" (1/1) ... [2021-11-23 17:26:03,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:26:03,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:03,102 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:26:03,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:26:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:26:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:26:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 17:26:03,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:26:03,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:26:03,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 17:26:03,224 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:26:03,226 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:26:03,342 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:26:03,364 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 17:26:03,369 INFO L158 Benchmark]: Toolchain (without parser) took 2239.77ms. Allocated memory was 104.9MB in the beginning and 453.0MB in the end (delta: 348.1MB). Free memory was 64.5MB in the beginning and 230.0MB in the end (delta: -165.5MB). Peak memory consumption was 182.2MB. Max. memory is 16.1GB. [2021-11-23 17:26:03,370 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 104.9MB. Free memory is still 80.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:26:03,371 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1827.82ms. Allocated memory was 104.9MB in the beginning and 453.0MB in the end (delta: 348.1MB). Free memory was 64.3MB in the beginning and 243.6MB in the end (delta: -179.3MB). Peak memory consumption was 171.7MB. Max. memory is 16.1GB. [2021-11-23 17:26:03,372 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.90ms. Allocated memory is still 453.0MB. Free memory was 243.6MB in the beginning and 242.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:26:03,373 INFO L158 Benchmark]: Boogie Preprocessor took 57.05ms. Allocated memory is still 453.0MB. Free memory was 242.5MB in the beginning and 241.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:26:03,375 INFO L158 Benchmark]: RCFGBuilder took 303.24ms. Allocated memory is still 453.0MB. Free memory was 241.5MB in the beginning and 230.0MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:26:03,380 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 104.9MB. Free memory is still 80.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1827.82ms. Allocated memory was 104.9MB in the beginning and 453.0MB in the end (delta: 348.1MB). Free memory was 64.3MB in the beginning and 243.6MB in the end (delta: -179.3MB). Peak memory consumption was 171.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.90ms. Allocated memory is still 453.0MB. Free memory was 243.6MB in the beginning and 242.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 57.05ms. Allocated memory is still 453.0MB. Free memory was 242.5MB in the beginning and 241.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 303.24ms. Allocated memory is still 453.0MB. Free memory was 241.5MB in the beginning and 230.0MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.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 17:26:03,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/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_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/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_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/scalar_loopdep.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/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_fa5f48da-cf19-4570-8504-68088196b5f0/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 004e76a55ea43180d22836854efb5ff40e4c49966cf8226e42027e9f69007914 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:26:06,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:26:06,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:26:06,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:26:06,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:26:06,164 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:26:06,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:26:06,171 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:26:06,175 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:26:06,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:26:06,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:26:06,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:26:06,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:26:06,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:26:06,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:26:06,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:26:06,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:26:06,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:26:06,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:26:06,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:26:06,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:26:06,226 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:26:06,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:26:06,231 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:26:06,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:26:06,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:26:06,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:26:06,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:26:06,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:26:06,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:26:06,249 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:26:06,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:26:06,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:26:06,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:26:06,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:26:06,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:26:06,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:26:06,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:26:06,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:26:06,261 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:26:06,262 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:26:06,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:26:06,319 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:26:06,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:26:06,321 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:26:06,321 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:26:06,322 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:26:06,323 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:26:06,323 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:26:06,323 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:26:06,324 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:26:06,324 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:26:06,325 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:26:06,326 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:26:06,328 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:26:06,328 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:26:06,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:26:06,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:26:06,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:26:06,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:26:06,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:26:06,330 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:26:06,331 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:26:06,331 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:26:06,332 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:26:06,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:26:06,332 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:26:06,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:26:06,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:26:06,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:26:06,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:26:06,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:26:06,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:26:06,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:26:06,336 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:26:06,336 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:26:06,337 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:06,337 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:26:06,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:26:06,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:26:06,339 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_fa5f48da-cf19-4570-8504-68088196b5f0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 004e76a55ea43180d22836854efb5ff40e4c49966cf8226e42027e9f69007914 [2021-11-23 17:26:06,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:26:06,884 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:26:06,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:26:06,889 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:26:06,890 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:26:06,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/array-lopstr16/scalar_loopdep.i [2021-11-23 17:26:06,981 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/data/81045eb91/315d8c24b8924c8b873221b0502af9e2/FLAGd83e3591c [2021-11-23 17:26:07,514 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:26:07,515 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i [2021-11-23 17:26:07,522 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/data/81045eb91/315d8c24b8924c8b873221b0502af9e2/FLAGd83e3591c [2021-11-23 17:26:07,927 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/data/81045eb91/315d8c24b8924c8b873221b0502af9e2 [2021-11-23 17:26:07,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:26:07,932 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:26:07,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:26:07,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:26:07,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:26:07,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:26:07" (1/1) ... [2021-11-23 17:26:07,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bdb6da3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:07, skipping insertion in model container [2021-11-23 17:26:07,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:26:07" (1/1) ... [2021-11-23 17:26:07,951 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:26:07,969 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:26:08,190 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_fa5f48da-cf19-4570-8504-68088196b5f0/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i[807,820] [2021-11-23 17:26:08,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:26:10,151 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:26:10,169 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_fa5f48da-cf19-4570-8504-68088196b5f0/sv-benchmarks/c/array-lopstr16/scalar_loopdep.i[807,820] [2021-11-23 17:26:10,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:26:10,202 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:26:10,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:10 WrapperNode [2021-11-23 17:26:10,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:26:10,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:26:10,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:26:10,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:26:10,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:10" (1/1) ... [2021-11-23 17:26:10,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:10" (1/1) ... [2021-11-23 17:26:10,257 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 46 [2021-11-23 17:26:10,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:26:10,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:26:10,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:26:10,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:26:10,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:10" (1/1) ... [2021-11-23 17:26:10,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:10" (1/1) ... [2021-11-23 17:26:10,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:10" (1/1) ... [2021-11-23 17:26:10,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:10" (1/1) ... [2021-11-23 17:26:10,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:10" (1/1) ... [2021-11-23 17:26:10,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:10" (1/1) ... [2021-11-23 17:26:10,307 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:10" (1/1) ... [2021-11-23 17:26:10,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:26:10,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:26:10,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:26:10,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:26:10,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:10" (1/1) ... [2021-11-23 17:26:10,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:26:10,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:10,360 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:26:10,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:26:10,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:26:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:26:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 17:26:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:26:10,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:26:10,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 17:26:10,532 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:26:10,534 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:26:10,682 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:26:10,687 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:26:10,687 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 17:26:10,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:26:10 BoogieIcfgContainer [2021-11-23 17:26:10,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:26:10,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:26:10,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:26:10,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:26:10,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:26:07" (1/3) ... [2021-11-23 17:26:10,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136468ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:26:10, skipping insertion in model container [2021-11-23 17:26:10,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:26:10" (2/3) ... [2021-11-23 17:26:10,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@136468ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:26:10, skipping insertion in model container [2021-11-23 17:26:10,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:26:10" (3/3) ... [2021-11-23 17:26:10,698 INFO L111 eAbstractionObserver]: Analyzing ICFG scalar_loopdep.i [2021-11-23 17:26:10,704 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:26:10,704 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:26:10,785 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:26:10,792 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 17:26:10,792 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:26:10,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 17:26:10,812 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:10,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:10,813 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:10,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:10,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1807957391, now seen corresponding path program 1 times [2021-11-23 17:26:10,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:10,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172117338] [2021-11-23 17:26:10,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:10,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:10,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:10,841 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:10,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:26:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:10,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:26:10,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:11,021 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 17:26:11,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:11,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:11,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172117338] [2021-11-23 17:26:11,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172117338] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:11,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:26:11,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:26:11,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476467515] [2021-11-23 17:26:11,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:11,032 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:11,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:11,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:11,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:26:11,087 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 17:26:11,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:11,178 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-11-23 17:26:11,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:11,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-23 17:26:11,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:11,201 INFO L225 Difference]: With dead ends: 34 [2021-11-23 17:26:11,202 INFO L226 Difference]: Without dead ends: 19 [2021-11-23 17:26:11,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 17:26:11,217 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:11,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:26:11,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-23 17:26:11,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 12. [2021-11-23 17:26:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 17:26:11,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-23 17:26:11,267 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2021-11-23 17:26:11,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:11,267 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-23 17:26:11,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 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 17:26:11,269 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-23 17:26:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 17:26:11,270 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:11,271 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:11,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:11,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:11,484 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:11,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:11,490 INFO L85 PathProgramCache]: Analyzing trace with hash -369319347, now seen corresponding path program 1 times [2021-11-23 17:26:11,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:11,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888521503] [2021-11-23 17:26:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:11,496 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:11,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:11,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:11,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:26:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:11,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:26:11,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:11,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:11,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:11,736 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:11,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888521503] [2021-11-23 17:26:11,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888521503] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:11,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [388112423] [2021-11-23 17:26:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:11,738 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:11,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:11,751 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:11,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-23 17:26:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:11,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:26:11,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:11,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:11,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:11,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [388112423] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602462201] [2021-11-23 17:26:11,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:11,952 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:11,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:11,960 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:26:11,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 17:26:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:12,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:26:12,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:12,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:12,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602462201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:12,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:26:12,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-23 17:26:12,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961211034] [2021-11-23 17:26:12,090 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:26:12,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:26:12,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:26:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 17:26:12,094 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 17:26:12,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:12,230 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-23 17:26:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:26:12,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 17:26:12,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:12,233 INFO L225 Difference]: With dead ends: 44 [2021-11-23 17:26:12,233 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 17:26:12,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 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 17:26:12,236 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:12,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 27 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:26:12,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 17:26:12,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 18. [2021-11-23 17:26:12,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:12,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-23 17:26:12,244 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 9 [2021-11-23 17:26:12,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:12,245 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-23 17:26:12,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 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 17:26:12,245 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-23 17:26:12,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 17:26:12,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:12,247 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:12,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:12,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:12,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 17:26:12,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:12,850 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:12,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:12,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1716192135, now seen corresponding path program 2 times [2021-11-23 17:26:12,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:12,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1285902973] [2021-11-23 17:26:12,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:26:12,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:12,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:12,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:12,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:26:12,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:26:12,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:12,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:26:12,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:13,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:13,185 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:13,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1285902973] [2021-11-23 17:26:13,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1285902973] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:13,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1401715463] [2021-11-23 17:26:13,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:26:13,186 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:13,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:13,191 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:13,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-23 17:26:13,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:26:13,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:13,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:26:13,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:13,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:13,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1401715463] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:13,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118250240] [2021-11-23 17:26:13,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:26:13,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:13,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:13,436 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:26:13,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 17:26:13,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:26:13,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:13,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:26:13,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:13,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:13,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118250240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:13,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:26:13,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 12 [2021-11-23 17:26:13,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566020846] [2021-11-23 17:26:13,623 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:26:13,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 17:26:13,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:13,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 17:26:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:26:13,629 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:14,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:14,127 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-11-23 17:26:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:26:14,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 17:26:14,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:14,130 INFO L225 Difference]: With dead ends: 92 [2021-11-23 17:26:14,130 INFO L226 Difference]: Without dead ends: 85 [2021-11-23 17:26:14,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 74 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 17:26:14,132 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 191 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:14,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 125 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:26:14,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-23 17:26:14,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 30. [2021-11-23 17:26:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-23 17:26:14,142 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 15 [2021-11-23 17:26:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:14,142 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-23 17:26:14,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:14,143 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-23 17:26:14,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 17:26:14,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:14,144 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:14,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:14,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:14,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:14,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:14,757 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:14,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:14,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1328180091, now seen corresponding path program 3 times [2021-11-23 17:26:14,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:14,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1787634621] [2021-11-23 17:26:14,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:26:14,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:14,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:14,760 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:14,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:26:14,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 17:26:14,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:14,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:26:14,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:15,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:15,626 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:15,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:15,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1787634621] [2021-11-23 17:26:15,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1787634621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:15,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [274048667] [2021-11-23 17:26:15,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:26:15,627 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:15,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:15,630 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:15,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 17:26:15,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 17:26:15,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:15,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:26:15,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:15,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:17,057 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:17,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [274048667] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:17,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59439044] [2021-11-23 17:26:17,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 17:26:17,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:17,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:17,060 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:26:17,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 17:26:18,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 17:26:18,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:18,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:26:18,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:18,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:18,449 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:18,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59439044] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:18,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:26:18,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 14, 13, 14] total 34 [2021-11-23 17:26:18,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567284931] [2021-11-23 17:26:18,450 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:26:18,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-23 17:26:18,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:18,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-23 17:26:18,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=771, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 17:26:18,453 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 17:26:20,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:20,799 INFO L93 Difference]: Finished difference Result 188 states and 201 transitions. [2021-11-23 17:26:20,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 17:26:20,800 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 17:26:20,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:20,802 INFO L225 Difference]: With dead ends: 188 [2021-11-23 17:26:20,803 INFO L226 Difference]: Without dead ends: 181 [2021-11-23 17:26:20,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=671, Invalid=1309, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 17:26:20,805 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 719 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:20,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 569 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 17:26:20,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-23 17:26:20,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 54. [2021-11-23 17:26:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:26:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-11-23 17:26:20,819 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 27 [2021-11-23 17:26:20,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:20,819 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-11-23 17:26:20,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 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 17:26:20,820 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-11-23 17:26:20,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 17:26:20,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:20,822 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:20,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:21,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:21,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:21,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:21,425 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:21,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:21,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1458393443, now seen corresponding path program 4 times [2021-11-23 17:26:21,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:21,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354823543] [2021-11-23 17:26:21,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:26:21,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:21,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:21,428 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:21,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:26:21,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:26:21,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:21,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:26:21,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:22,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:23,823 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:23,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354823543] [2021-11-23 17:26:23,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354823543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:23,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1307842119] [2021-11-23 17:26:23,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:26:23,824 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:23,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:23,825 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:23,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:26:24,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:26:24,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:24,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:26:24,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:24,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:24,466 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:24,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1307842119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:24,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127713234] [2021-11-23 17:26:24,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 17:26:24,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:24,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:24,469 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:26:24,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 17:26:24,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 17:26:24,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:24,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 17:26:24,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:24,769 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:24,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:24,972 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:24,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127713234] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:24,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:26:24,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 25, 25, 25] total 48 [2021-11-23 17:26:24,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801656281] [2021-11-23 17:26:24,973 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:26:24,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 17:26:24,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:24,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 17:26:24,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=1634, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 17:26:24,978 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 17:26:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:34,217 INFO L93 Difference]: Finished difference Result 380 states and 405 transitions. [2021-11-23 17:26:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-23 17:26:34,218 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-23 17:26:34,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:34,224 INFO L225 Difference]: With dead ends: 380 [2021-11-23 17:26:34,225 INFO L226 Difference]: Without dead ends: 373 [2021-11-23 17:26:34,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1678, Invalid=3152, Unknown=0, NotChecked=0, Total=4830 [2021-11-23 17:26:34,229 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 3282 mSDsluCounter, 2136 mSDsCounter, 0 mSdLazyCounter, 2276 mSolverCounterSat, 694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3282 SdHoareTripleChecker+Valid, 2232 SdHoareTripleChecker+Invalid, 2970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 694 IncrementalHoareTripleChecker+Valid, 2276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:34,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3282 Valid, 2232 Invalid, 2970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [694 Valid, 2276 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 17:26:34,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-23 17:26:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 102. [2021-11-23 17:26:34,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 17:26:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2021-11-23 17:26:34,247 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 51 [2021-11-23 17:26:34,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:34,248 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2021-11-23 17:26:34,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 0 states have call successors, (0), 0 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 17:26:34,249 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2021-11-23 17:26:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-23 17:26:34,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:34,253 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:26:34,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:34,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:34,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-23 17:26:34,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:34,866 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:34,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:34,866 INFO L85 PathProgramCache]: Analyzing trace with hash 546272563, now seen corresponding path program 5 times [2021-11-23 17:26:34,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:34,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [145075429] [2021-11-23 17:26:34,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:26:34,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:34,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:34,869 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:34,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:26:35,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-11-23 17:26:35,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:26:35,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 17:26:35,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:37,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:26:45,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:45,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [145075429] [2021-11-23 17:26:45,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [145075429] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:45,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1327086110] [2021-11-23 17:26:45,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:26:45,080 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:45,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:45,080 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:45,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 17:27:09,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-11-23 17:27:09,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:27:10,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-23 17:27:10,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:10,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:27:21,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1327086110] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:21,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583534268] [2021-11-23 17:27:21,844 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 17:27:21,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:21,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:21,854 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:21,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fa5f48da-cf19-4570-8504-68088196b5f0/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process