./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/single_elem_safe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/single_elem_safe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V --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 f1aed9bc44add9424c35127ba8c0166402387241540742ea765fb4b7385c8271 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:45:12,046 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:45:12,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:45:12,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:45:12,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:45:12,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:45:12,090 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:45:12,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:45:12,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:45:12,097 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:45:12,098 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:45:12,100 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:45:12,100 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:45:12,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:45:12,104 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:45:12,106 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:45:12,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:45:12,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:45:12,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:45:12,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:45:12,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:45:12,118 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:45:12,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:45:12,121 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:45:12,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:45:12,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:45:12,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:45:12,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:45:12,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:45:12,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:45:12,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:45:12,132 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:45:12,133 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:45:12,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:45:12,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:45:12,136 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:45:12,137 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:45:12,137 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:45:12,138 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:45:12,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:45:12,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:45:12,141 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:45:12,173 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:45:12,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:45:12,174 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:45:12,174 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:45:12,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:45:12,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:45:12,182 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:45:12,182 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:45:12,182 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:45:12,182 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:45:12,183 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:45:12,184 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:45:12,184 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:45:12,184 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:45:12,184 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:45:12,185 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:45:12,185 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:45:12,185 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:45:12,186 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:45:12,186 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:45:12,186 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:45:12,187 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:45:12,187 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:45:12,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:45:12,188 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:45:12,188 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:45:12,189 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:45:12,190 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:45:12,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:45:12,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:45:12,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:45:12,191 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:45:12,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:45:12,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:45:12,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:45:12,192 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:45:12,192 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:45:12,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:45:12,192 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:45:12,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:45:12,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:45:12,193 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_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1aed9bc44add9424c35127ba8c0166402387241540742ea765fb4b7385c8271 [2021-11-23 02:45:12,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:45:12,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:45:12,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:45:12,579 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:45:12,580 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:45:12,581 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-lopstr16/single_elem_safe.i [2021-11-23 02:45:12,655 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/data/00d97f4d6/842609f36ea340c6b1d94a4bffa531a9/FLAGb5c617026 [2021-11-23 02:45:13,312 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:45:13,313 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/sv-benchmarks/c/array-lopstr16/single_elem_safe.i [2021-11-23 02:45:13,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/data/00d97f4d6/842609f36ea340c6b1d94a4bffa531a9/FLAGb5c617026 [2021-11-23 02:45:13,348 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/data/00d97f4d6/842609f36ea340c6b1d94a4bffa531a9 [2021-11-23 02:45:13,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:45:13,354 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:45:13,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:45:13,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:45:13,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:45:13,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:45:13" (1/1) ... [2021-11-23 02:45:13,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8e73e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:13, skipping insertion in model container [2021-11-23 02:45:13,367 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:45:13" (1/1) ... [2021-11-23 02:45:13,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:45:13,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:45:13,609 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_30bef2a0-2324-41cb-8b94-d451169eab7e/sv-benchmarks/c/array-lopstr16/single_elem_safe.i[809,822] [2021-11-23 02:45:13,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:45:13,644 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:45:13,664 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_30bef2a0-2324-41cb-8b94-d451169eab7e/sv-benchmarks/c/array-lopstr16/single_elem_safe.i[809,822] [2021-11-23 02:45:13,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:45:13,690 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:45:13,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:13 WrapperNode [2021-11-23 02:45:13,691 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:45:13,692 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:45:13,692 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:45:13,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:45:13,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:13" (1/1) ... [2021-11-23 02:45:13,710 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:13" (1/1) ... [2021-11-23 02:45:13,734 INFO L137 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2021-11-23 02:45:13,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:45:13,736 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:45:13,736 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:45:13,736 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:45:13,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:13" (1/1) ... [2021-11-23 02:45:13,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:13" (1/1) ... [2021-11-23 02:45:13,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:13" (1/1) ... [2021-11-23 02:45:13,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:13" (1/1) ... [2021-11-23 02:45:13,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:13" (1/1) ... [2021-11-23 02:45:13,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:13" (1/1) ... [2021-11-23 02:45:13,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:13" (1/1) ... [2021-11-23 02:45:13,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:45:13,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:45:13,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:45:13,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:45:13,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:13" (1/1) ... [2021-11-23 02:45:13,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:45:13,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:13,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:45:13,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:45:13,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:45:13,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:45:13,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:45:13,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:45:13,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:45:13,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:45:13,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:45:13,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:45:13,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:45:14,002 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:45:14,004 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:45:14,261 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:45:14,377 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:45:14,377 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:45:14,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:45:14 BoogieIcfgContainer [2021-11-23 02:45:14,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:45:14,384 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:45:14,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:45:14,389 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:45:14,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:45:13" (1/3) ... [2021-11-23 02:45:14,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17934a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:45:14, skipping insertion in model container [2021-11-23 02:45:14,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:13" (2/3) ... [2021-11-23 02:45:14,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17934a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:45:14, skipping insertion in model container [2021-11-23 02:45:14,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:45:14" (3/3) ... [2021-11-23 02:45:14,394 INFO L111 eAbstractionObserver]: Analyzing ICFG single_elem_safe.i [2021-11-23 02:45:14,400 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:45:14,400 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:45:14,468 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:45:14,475 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 02:45:14,476 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:45:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 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 02:45:14,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:45:14,495 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:14,496 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:45:14,496 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:14,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:14,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1152590673, now seen corresponding path program 1 times [2021-11-23 02:45:14,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:14,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893777330] [2021-11-23 02:45:14,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:14,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:14,672 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 02:45:14,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:14,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893777330] [2021-11-23 02:45:14,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893777330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:14,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:14,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:45:14,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846558870] [2021-11-23 02:45:14,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:14,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:45:14,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:45:14,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:45:14,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:45:14,737 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 02:45:14,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:14,903 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2021-11-23 02:45:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:45:14,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 02:45:14,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:14,916 INFO L225 Difference]: With dead ends: 26 [2021-11-23 02:45:14,920 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 02:45:14,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:45:14,929 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 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 02:45:14,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:45:14,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 02:45:14,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2021-11-23 02:45:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:45:14,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-23 02:45:14,962 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2021-11-23 02:45:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:14,962 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-23 02:45:14,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 02:45:14,963 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-23 02:45:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:45:14,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:14,964 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:14,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:45:14,964 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:14,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:14,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1165672885, now seen corresponding path program 1 times [2021-11-23 02:45:14,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:45:14,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053580681] [2021-11-23 02:45:14,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:14,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:45:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:15,046 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 02:45:15,046 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:45:15,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053580681] [2021-11-23 02:45:15,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053580681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:45:15,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316222333] [2021-11-23 02:45:15,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:15,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:15,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:15,051 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:45:15,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:45:15,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:15,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:45:15,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:15,243 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 02:45:15,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:15,297 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 02:45:15,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316222333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:15,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [370063102] [2021-11-23 02:45:15,329 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-23 02:45:15,330 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:45:15,335 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:45:15,341 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:45:15,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:45:15,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-23 02:45:15,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-23 02:45:15,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:15,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2021-11-23 02:45:15,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2021-11-23 02:45:15,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:15,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2021-11-23 02:45:16,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2021-11-23 02:45:16,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:16,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 48 [2021-11-23 02:45:16,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:16,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:16,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:16,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-23 02:45:16,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:16,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:16,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:45:16,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 41 [2021-11-23 02:45:16,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:16,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:16,591 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:496) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:65) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:635) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpretForSingleMarker(DagInterpreter.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:98) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) 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 02:45:16,596 INFO L158 Benchmark]: Toolchain (without parser) took 3241.90ms. Allocated memory was 98.6MB in the beginning and 138.4MB in the end (delta: 39.8MB). Free memory was 60.6MB in the beginning and 96.0MB in the end (delta: -35.5MB). Peak memory consumption was 64.0MB. Max. memory is 16.1GB. [2021-11-23 02:45:16,597 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 98.6MB. Free memory was 77.5MB in the beginning and 77.5MB in the end (delta: 51.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:45:16,597 INFO L158 Benchmark]: CACSL2BoogieTranslator took 332.46ms. Allocated memory is still 98.6MB. Free memory was 60.4MB in the beginning and 72.9MB in the end (delta: -12.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 02:45:16,598 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.38ms. Allocated memory is still 98.6MB. Free memory was 72.9MB in the beginning and 71.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:45:16,598 INFO L158 Benchmark]: Boogie Preprocessor took 30.02ms. Allocated memory is still 98.6MB. Free memory was 71.1MB in the beginning and 69.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:45:16,599 INFO L158 Benchmark]: RCFGBuilder took 615.91ms. Allocated memory is still 98.6MB. Free memory was 69.8MB in the beginning and 54.6MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 02:45:16,600 INFO L158 Benchmark]: TraceAbstraction took 2211.37ms. Allocated memory was 98.6MB in the beginning and 138.4MB in the end (delta: 39.8MB). Free memory was 54.1MB in the beginning and 96.0MB in the end (delta: -42.0MB). Peak memory consumption was 58.2MB. Max. memory is 16.1GB. [2021-11-23 02:45:16,611 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 98.6MB. Free memory was 77.5MB in the beginning and 77.5MB in the end (delta: 51.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 332.46ms. Allocated memory is still 98.6MB. Free memory was 60.4MB in the beginning and 72.9MB in the end (delta: -12.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.38ms. Allocated memory is still 98.6MB. Free memory was 72.9MB in the beginning and 71.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.02ms. Allocated memory is still 98.6MB. Free memory was 71.1MB in the beginning and 69.8MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 615.91ms. Allocated memory is still 98.6MB. Free memory was 69.8MB in the beginning and 54.6MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 2211.37ms. Allocated memory was 98.6MB in the beginning and 138.4MB in the end (delta: 39.8MB). Free memory was 54.1MB in the beginning and 96.0MB in the end (delta: -42.0MB). Peak memory consumption was 58.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 02:45:16,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally 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_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/single_elem_safe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V --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 f1aed9bc44add9424c35127ba8c0166402387241540742ea765fb4b7385c8271 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:45:19,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:45:19,372 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:45:19,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:45:19,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:45:19,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:45:19,439 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:45:19,444 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:45:19,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:45:19,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:45:19,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:45:19,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:45:19,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:45:19,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:45:19,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:45:19,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:45:19,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:45:19,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:45:19,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:45:19,488 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:45:19,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:45:19,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:45:19,501 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:45:19,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:45:19,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:45:19,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:45:19,514 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:45:19,515 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:45:19,516 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:45:19,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:45:19,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:45:19,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:45:19,519 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:45:19,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:45:19,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:45:19,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:45:19,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:45:19,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:45:19,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:45:19,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:45:19,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:45:19,554 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 02:45:19,606 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:45:19,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:45:19,607 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:45:19,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:45:19,608 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:45:19,609 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:45:19,609 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:45:19,609 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:45:19,610 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:45:19,610 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:45:19,611 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:45:19,612 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:45:19,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:45:19,614 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:45:19,614 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:45:19,614 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:45:19,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:45:19,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:45:19,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:45:19,615 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:45:19,616 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:45:19,616 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:45:19,616 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:45:19,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:45:19,617 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:45:19,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:45:19,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:45:19,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:45:19,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:45:19,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:45:19,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:45:19,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:45:19,619 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:45:19,620 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:45:19,620 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:45:19,620 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:45:19,621 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:45:19,621 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:45:19,621 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_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1aed9bc44add9424c35127ba8c0166402387241540742ea765fb4b7385c8271 [2021-11-23 02:45:20,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:45:20,094 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:45:20,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:45:20,098 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:45:20,107 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:45:20,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/array-lopstr16/single_elem_safe.i [2021-11-23 02:45:20,193 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/data/5a4faf593/0ebc321f5acf4a0e82fa3ba30c639db5/FLAG1b8d6530d [2021-11-23 02:45:20,914 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:45:20,915 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/sv-benchmarks/c/array-lopstr16/single_elem_safe.i [2021-11-23 02:45:20,925 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/data/5a4faf593/0ebc321f5acf4a0e82fa3ba30c639db5/FLAG1b8d6530d [2021-11-23 02:45:21,242 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/data/5a4faf593/0ebc321f5acf4a0e82fa3ba30c639db5 [2021-11-23 02:45:21,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:45:21,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:45:21,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:45:21,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:45:21,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:45:21,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:45:21" (1/1) ... [2021-11-23 02:45:21,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28fc70aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:21, skipping insertion in model container [2021-11-23 02:45:21,260 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:45:21" (1/1) ... [2021-11-23 02:45:21,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:45:21,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:45:21,497 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_30bef2a0-2324-41cb-8b94-d451169eab7e/sv-benchmarks/c/array-lopstr16/single_elem_safe.i[809,822] [2021-11-23 02:45:21,523 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:45:21,538 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 02:45:21,542 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:45:21,547 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_30bef2a0-2324-41cb-8b94-d451169eab7e/sv-benchmarks/c/array-lopstr16/single_elem_safe.i[809,822] [2021-11-23 02:45:21,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:45:21,581 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:45:21,606 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_30bef2a0-2324-41cb-8b94-d451169eab7e/sv-benchmarks/c/array-lopstr16/single_elem_safe.i[809,822] [2021-11-23 02:45:21,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:45:21,662 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:45:21,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:21 WrapperNode [2021-11-23 02:45:21,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:45:21,666 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:45:21,666 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:45:21,667 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:45:21,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:21" (1/1) ... [2021-11-23 02:45:21,700 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:21" (1/1) ... [2021-11-23 02:45:21,733 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2021-11-23 02:45:21,734 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:45:21,735 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:45:21,735 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:45:21,735 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:45:21,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:21" (1/1) ... [2021-11-23 02:45:21,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:21" (1/1) ... [2021-11-23 02:45:21,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:21" (1/1) ... [2021-11-23 02:45:21,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:21" (1/1) ... [2021-11-23 02:45:21,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:21" (1/1) ... [2021-11-23 02:45:21,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:21" (1/1) ... [2021-11-23 02:45:21,789 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:21" (1/1) ... [2021-11-23 02:45:21,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:45:21,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:45:21,800 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:45:21,800 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:45:21,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:21" (1/1) ... [2021-11-23 02:45:21,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:45:21,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:21,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:45:21,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:45:21,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:45:21,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:45:21,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:45:21,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:45:21,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:45:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-23 02:45:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:45:21,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:45:21,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-23 02:45:22,035 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:45:22,052 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:45:22,328 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:45:22,335 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:45:22,335 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:45:22,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:45:22 BoogieIcfgContainer [2021-11-23 02:45:22,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:45:22,339 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:45:22,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:45:22,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:45:22,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:45:21" (1/3) ... [2021-11-23 02:45:22,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd224e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:45:22, skipping insertion in model container [2021-11-23 02:45:22,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:21" (2/3) ... [2021-11-23 02:45:22,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd224e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:45:22, skipping insertion in model container [2021-11-23 02:45:22,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:45:22" (3/3) ... [2021-11-23 02:45:22,346 INFO L111 eAbstractionObserver]: Analyzing ICFG single_elem_safe.i [2021-11-23 02:45:22,352 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:45:22,352 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:45:22,404 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:45:22,412 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 02:45:22,412 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:45:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:45:22,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:45:22,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:22,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:22,434 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:22,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:22,441 INFO L85 PathProgramCache]: Analyzing trace with hash -739796340, now seen corresponding path program 1 times [2021-11-23 02:45:22,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:45:22,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127966291] [2021-11-23 02:45:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:22,455 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:45:22,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:45:22,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:45:22,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:45:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:22,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 02:45:22,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:22,638 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 02:45:22,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:22,679 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 02:45:22,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:45:22,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127966291] [2021-11-23 02:45:22,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127966291] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:22,681 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:22,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:45:22,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781241291] [2021-11-23 02:45:22,684 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:22,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 02:45:22,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:45:22,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 02:45:22,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:45:22,745 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:45:22,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:22,765 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2021-11-23 02:45:22,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 02:45:22,768 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 02:45:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:22,786 INFO L225 Difference]: With dead ends: 34 [2021-11-23 02:45:22,786 INFO L226 Difference]: Without dead ends: 17 [2021-11-23 02:45:22,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 02:45:22,793 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:22,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:45:22,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-23 02:45:22,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-23 02:45:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:45:22,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-11-23 02:45:22,829 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 9 [2021-11-23 02:45:22,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:22,830 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-11-23 02:45:22,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:45:22,830 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-11-23 02:45:22,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:45:22,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:22,831 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:22,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:23,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:45:23,043 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:23,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:23,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1452551885, now seen corresponding path program 1 times [2021-11-23 02:45:23,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:45:23,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1808703725] [2021-11-23 02:45:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:23,047 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:45:23,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:45:23,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:45:23,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:45:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:23,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:45:23,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:23,144 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 02:45:23,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:23,174 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 02:45:23,174 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:45:23,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1808703725] [2021-11-23 02:45:23,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1808703725] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:23,175 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:23,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 02:45:23,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926879160] [2021-11-23 02:45:23,176 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:23,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:45:23,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:45:23,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:45:23,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:45:23,179 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:45:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:23,253 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2021-11-23 02:45:23,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:45:23,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 02:45:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:23,255 INFO L225 Difference]: With dead ends: 42 [2021-11-23 02:45:23,255 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 02:45:23,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:45:23,257 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 34 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:23,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:45:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 02:45:23,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2021-11-23 02:45:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:45:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2021-11-23 02:45:23,274 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 9 [2021-11-23 02:45:23,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:23,274 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2021-11-23 02:45:23,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:45:23,274 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2021-11-23 02:45:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:45:23,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:23,276 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:23,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 02:45:23,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:45:23,486 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:23,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:23,487 INFO L85 PathProgramCache]: Analyzing trace with hash -475799373, now seen corresponding path program 1 times [2021-11-23 02:45:23,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:45:23,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860376539] [2021-11-23 02:45:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:23,489 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:45:23,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:45:23,490 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:45:23,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:45:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:23,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:45:23,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:23,652 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:45:23,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:45:23,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:45:23,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860376539] [2021-11-23 02:45:23,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860376539] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:23,727 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:45:23,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:45:23,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143476498] [2021-11-23 02:45:23,727 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:23,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:45:23,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:45:23,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:45:23,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:45:23,729 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:45:23,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:23,773 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2021-11-23 02:45:23,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:45:23,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 02:45:23,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:23,776 INFO L225 Difference]: With dead ends: 61 [2021-11-23 02:45:23,777 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 02:45:23,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 35 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 02:45:23,779 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:23,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 49 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:45:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 02:45:23,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2021-11-23 02:45:23,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 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 02:45:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2021-11-23 02:45:23,813 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 19 [2021-11-23 02:45:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:23,813 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-11-23 02:45:23,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:45:23,814 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2021-11-23 02:45:23,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:45:23,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:23,816 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:23,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 02:45:24,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:45:24,033 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:24,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:24,033 INFO L85 PathProgramCache]: Analyzing trace with hash -795803149, now seen corresponding path program 1 times [2021-11-23 02:45:24,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:45:24,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788265189] [2021-11-23 02:45:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:24,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:45:24,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:45:24,036 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:45:24,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:45:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:24,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:45:24,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:24,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:24,340 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:45:24,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788265189] [2021-11-23 02:45:24,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788265189] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:24,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1439067371] [2021-11-23 02:45:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:24,342 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:45:24,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:45:24,349 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:45:24,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 02:45:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:24,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:45:24,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:24,514 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:45:24,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:45:24,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1439067371] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:45:24,552 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:45:24,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-23 02:45:24,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154163759] [2021-11-23 02:45:24,553 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:45:24,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:45:24,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:45:24,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:45:24,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:45:24,559 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 02:45:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:24,586 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2021-11-23 02:45:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:45:24,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 19 [2021-11-23 02:45:24,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:24,596 INFO L225 Difference]: With dead ends: 35 [2021-11-23 02:45:24,596 INFO L226 Difference]: Without dead ends: 27 [2021-11-23 02:45:24,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:45:24,600 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:24,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:45:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-23 02:45:24,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-23 02:45:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 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 02:45:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2021-11-23 02:45:24,623 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 19 [2021-11-23 02:45:24,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:24,624 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2021-11-23 02:45:24,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 02:45:24,625 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2021-11-23 02:45:24,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:45:24,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:24,626 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:24,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:24,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:25,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:45:25,027 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:25,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:25,027 INFO L85 PathProgramCache]: Analyzing trace with hash -795862731, now seen corresponding path program 1 times [2021-11-23 02:45:25,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:45:25,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1624170785] [2021-11-23 02:45:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:25,028 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:45:25,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:45:25,030 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:45:25,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 02:45:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:25,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:45:25,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:25,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:25,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:45:25,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1624170785] [2021-11-23 02:45:25,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1624170785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:25,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2135062353] [2021-11-23 02:45:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:25,297 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:45:25,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:45:25,299 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:45:25,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 02:45:25,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:25,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:45:25,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:25,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:25,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:25,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2135062353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:25,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99454122] [2021-11-23 02:45:25,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:45:25,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:25,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:25,603 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:45:25,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:45:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:45:25,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:45:25,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:25,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:25,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99454122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:25,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:45:25,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-23 02:45:25,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68971338] [2021-11-23 02:45:25,837 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:45:25,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:45:25,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:45:25,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:45:25,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:45:25,839 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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 02:45:26,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:26,103 INFO L93 Difference]: Finished difference Result 111 states and 148 transitions. [2021-11-23 02:45:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:45:26,105 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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) Word has length 19 [2021-11-23 02:45:26,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:26,107 INFO L225 Difference]: With dead ends: 111 [2021-11-23 02:45:26,107 INFO L226 Difference]: Without dead ends: 101 [2021-11-23 02:45:26,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:45:26,108 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 167 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:26,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 162 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:45:26,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-23 02:45:26,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 55. [2021-11-23 02:45:26,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.4074074074074074) internal successors, (76), 54 states have internal predecessors, (76), 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 02:45:26,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2021-11-23 02:45:26,119 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 19 [2021-11-23 02:45:26,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:26,119 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2021-11-23 02:45:26,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 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 02:45:26,120 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2021-11-23 02:45:26,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 02:45:26,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:26,122 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:26,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:26,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:26,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 02:45:26,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:45:26,724 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash -572216651, now seen corresponding path program 2 times [2021-11-23 02:45:26,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:45:26,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442040221] [2021-11-23 02:45:26,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:45:26,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:45:26,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:45:26,727 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:45:26,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 02:45:26,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:45:26,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:45:26,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:45:26,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:26,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:27,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:45:27,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1442040221] [2021-11-23 02:45:27,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1442040221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:27,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2062912846] [2021-11-23 02:45:27,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:45:27,297 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:45:27,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:45:27,299 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:45:27,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 02:45:27,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:45:27,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:45:27,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:45:27,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:27,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:27,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2062912846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:27,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027108605] [2021-11-23 02:45:27,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:45:27,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:27,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:27,705 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:45:27,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:45:27,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:45:27,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:45:27,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:45:27,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:27,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:28,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027108605] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:28,013 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:45:28,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-11-23 02:45:28,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378871596] [2021-11-23 02:45:28,013 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:45:28,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:45:28,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:45:28,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:45:28,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-11-23 02:45:28,020 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 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 02:45:28,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:28,953 INFO L93 Difference]: Finished difference Result 239 states and 320 transitions. [2021-11-23 02:45:28,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:45:28,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 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 39 [2021-11-23 02:45:28,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:28,956 INFO L225 Difference]: With dead ends: 239 [2021-11-23 02:45:28,956 INFO L226 Difference]: Without dead ends: 229 [2021-11-23 02:45:28,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-11-23 02:45:28,957 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 901 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:28,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 781 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:45:28,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-23 02:45:28,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 111. [2021-11-23 02:45:28,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.4181818181818182) internal successors, (156), 110 states have internal predecessors, (156), 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 02:45:28,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 156 transitions. [2021-11-23 02:45:28,972 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 156 transitions. Word has length 39 [2021-11-23 02:45:28,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:28,972 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 156 transitions. [2021-11-23 02:45:28,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.4375) internal successors, (71), 16 states have internal predecessors, (71), 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 02:45:28,973 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 156 transitions. [2021-11-23 02:45:28,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 02:45:28,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:28,976 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:28,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:29,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:29,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:29,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:29,578 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:29,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:29,579 INFO L85 PathProgramCache]: Analyzing trace with hash 445025717, now seen corresponding path program 3 times [2021-11-23 02:45:29,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:45:29,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1892112714] [2021-11-23 02:45:29,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:45:29,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:45:29,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:45:29,583 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:45:29,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 02:45:29,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-23 02:45:29,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:45:29,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 02:45:29,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:30,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:31,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:45:31,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1892112714] [2021-11-23 02:45:31,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1892112714] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:31,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1113837734] [2021-11-23 02:45:31,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:45:31,308 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:45:31,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:45:31,315 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:45:31,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 02:45:34,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-23 02:45:34,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:45:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:45:34,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:34,551 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:34,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:36,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1113837734] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:36,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259915238] [2021-11-23 02:45:36,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:45:36,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:36,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:36,661 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:45:36,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:45:44,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-23 02:45:44,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:45:44,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:45:44,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:45,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:45,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259915238] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:45,819 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:45:45,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 18, 17, 18] total 46 [2021-11-23 02:45:45,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29222775] [2021-11-23 02:45:45,820 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:45:45,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-23 02:45:45,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:45:45,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-23 02:45:45,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=629, Invalid=1441, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 02:45:45,823 INFO L87 Difference]: Start difference. First operand 111 states and 156 transitions. Second operand has 46 states, 46 states have (on average 4.739130434782608) internal successors, (218), 46 states have internal predecessors, (218), 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 02:45:50,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:45:50,456 INFO L93 Difference]: Finished difference Result 495 states and 664 transitions. [2021-11-23 02:45:50,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-23 02:45:50,457 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.739130434782608) internal successors, (218), 46 states have internal predecessors, (218), 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 79 [2021-11-23 02:45:50,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:45:50,461 INFO L225 Difference]: With dead ends: 495 [2021-11-23 02:45:50,461 INFO L226 Difference]: Without dead ends: 485 [2021-11-23 02:45:50,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1215, Invalid=2445, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 02:45:50,464 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 3785 mSDsluCounter, 3279 mSDsCounter, 0 mSdLazyCounter, 1287 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3785 SdHoareTripleChecker+Valid, 3493 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:45:50,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3785 Valid, 3493 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1287 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 02:45:50,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-11-23 02:45:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 223. [2021-11-23 02:45:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.4234234234234233) internal successors, (316), 222 states have internal predecessors, (316), 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 02:45:50,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 316 transitions. [2021-11-23 02:45:50,503 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 316 transitions. Word has length 79 [2021-11-23 02:45:50,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:45:50,504 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 316 transitions. [2021-11-23 02:45:50,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.739130434782608) internal successors, (218), 46 states have internal predecessors, (218), 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 02:45:50,504 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 316 transitions. [2021-11-23 02:45:50,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-23 02:45:50,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:45:50,521 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:45:50,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-23 02:45:50,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:50,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:45:51,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:45:51,131 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:45:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:45:51,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1378702261, now seen corresponding path program 4 times [2021-11-23 02:45:51,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:45:51,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056907684] [2021-11-23 02:45:51,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:45:51,133 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:45:51,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:45:51,135 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:45:51,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 02:45:51,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:45:51,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:45:51,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 02:45:51,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:52,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:54,998 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:45:54,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056907684] [2021-11-23 02:45:54,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056907684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:54,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1846461470] [2021-11-23 02:45:54,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:45:54,999 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:45:54,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:45:54,999 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:45:55,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 02:45:55,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:45:55,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:45:55,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 02:45:55,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:55,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:55,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:56,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1846461470] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:56,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729967950] [2021-11-23 02:45:56,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:45:56,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:45:56,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:45:56,055 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:45:56,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 02:45:56,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:45:56,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:45:56,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-23 02:45:56,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:45:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:56,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:45:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2205 backedges. 0 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:45:56,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729967950] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:45:56,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:45:56,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33, 33, 33, 33] total 64 [2021-11-23 02:45:56,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736667235] [2021-11-23 02:45:56,985 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:45:56,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-23 02:45:56,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:45:56,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-23 02:45:56,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=2946, Unknown=0, NotChecked=0, Total=4032 [2021-11-23 02:45:56,990 INFO L87 Difference]: Start difference. First operand 223 states and 316 transitions. Second operand has 64 states, 64 states have (on average 4.859375) internal successors, (311), 64 states have internal predecessors, (311), 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 02:46:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:46:17,205 INFO L93 Difference]: Finished difference Result 1007 states and 1352 transitions. [2021-11-23 02:46:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-23 02:46:17,205 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.859375) internal successors, (311), 64 states have internal predecessors, (311), 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 159 [2021-11-23 02:46:17,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:46:17,211 INFO L225 Difference]: With dead ends: 1007 [2021-11-23 02:46:17,211 INFO L226 Difference]: Without dead ends: 997 [2021-11-23 02:46:17,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 886 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=3006, Invalid=5736, Unknown=0, NotChecked=0, Total=8742 [2021-11-23 02:46:17,216 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 11974 mSDsluCounter, 13471 mSDsCounter, 0 mSdLazyCounter, 5050 mSolverCounterSat, 965 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11974 SdHoareTripleChecker+Valid, 13909 SdHoareTripleChecker+Invalid, 6015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 965 IncrementalHoareTripleChecker+Valid, 5050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:46:17,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11974 Valid, 13909 Invalid, 6015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [965 Valid, 5050 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-11-23 02:46:17,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-11-23 02:46:17,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 447. [2021-11-23 02:46:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 1.4260089686098654) internal successors, (636), 446 states have internal predecessors, (636), 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 02:46:17,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 636 transitions. [2021-11-23 02:46:17,243 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 636 transitions. Word has length 159 [2021-11-23 02:46:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:46:17,244 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 636 transitions. [2021-11-23 02:46:17,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.859375) internal successors, (311), 64 states have internal predecessors, (311), 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 02:46:17,244 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 636 transitions. [2021-11-23 02:46:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2021-11-23 02:46:17,260 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:46:17,261 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:46:17,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:17,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:17,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:46:17,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:46:17,867 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:46:17,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:46:17,868 INFO L85 PathProgramCache]: Analyzing trace with hash -284762187, now seen corresponding path program 5 times [2021-11-23 02:46:17,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:46:17,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365418909] [2021-11-23 02:46:17,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 02:46:17,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:46:17,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:46:17,871 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:46:17,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 02:46:22,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2021-11-23 02:46:22,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:46:22,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-23 02:46:22,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:46:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:24,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:46:37,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:46:37,554 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:46:37,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365418909] [2021-11-23 02:46:37,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365418909] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:46:37,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [781843979] [2021-11-23 02:46:37,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 02:46:37,555 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:46:37,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:46:37,556 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:46:37,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 02:51:32,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2021-11-23 02:51:32,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:51:32,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-23 02:51:32,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:51:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:33,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:51:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9517 backedges. 0 proven. 9517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:51:55,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [781843979] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:51:55,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209087888] [2021-11-23 02:51:55,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 02:51:55,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:51:55,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:51:55,859 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:51:55,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30bef2a0-2324-41cb-8b94-d451169eab7e/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process