./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 09dc663f7f76eee13b6af61297831e3fbddcb16c16389bf8d94f2d27048733d0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:54:45,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:54:45,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:54:46,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:54:46,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:54:46,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:54:46,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:54:46,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:54:46,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:54:46,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:54:46,047 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:54:46,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:54:46,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:54:46,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:54:46,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:54:46,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:54:46,061 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:54:46,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:54:46,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:54:46,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:54:46,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:54:46,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:54:46,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:54:46,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:54:46,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:54:46,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:54:46,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:54:46,090 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:54:46,090 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:54:46,092 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:54:46,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:54:46,093 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:54:46,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:54:46,097 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:54:46,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:54:46,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:54:46,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:54:46,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:54:46,100 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:54:46,101 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:54:46,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:54:46,105 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:54:46,152 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:54:46,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:54:46,153 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:54:46,153 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:54:46,160 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:54:46,161 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:54:46,161 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:54:46,161 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:54:46,162 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:54:46,162 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:54:46,163 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:54:46,163 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:54:46,163 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:54:46,164 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:54:46,164 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:54:46,164 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:54:46,164 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:54:46,165 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:54:46,166 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:54:46,166 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:54:46,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:54:46,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:54:46,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:54:46,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:54:46,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:54:46,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:54:46,169 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:54:46,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:54:46,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:54:46,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:54:46,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:54:46,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:54:46,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:54:46,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:54:46,171 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:54:46,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:54:46,172 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:54:46,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:54:46,172 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:54:46,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:54:46,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:54:46,173 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_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09dc663f7f76eee13b6af61297831e3fbddcb16c16389bf8d94f2d27048733d0 [2021-11-20 23:54:46,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:54:46,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:54:46,501 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:54:46,502 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:54:46,503 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:54:46,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-industry-pattern/array_mul_init.i [2021-11-20 23:54:46,585 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/data/00f023b0a/2201ceb13dcf4f969bcee291cfdd0565/FLAGef2e66335 [2021-11-20 23:54:47,067 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:54:47,067 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/sv-benchmarks/c/array-industry-pattern/array_mul_init.i [2021-11-20 23:54:47,085 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/data/00f023b0a/2201ceb13dcf4f969bcee291cfdd0565/FLAGef2e66335 [2021-11-20 23:54:47,421 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/data/00f023b0a/2201ceb13dcf4f969bcee291cfdd0565 [2021-11-20 23:54:47,424 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:54:47,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:54:47,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:54:47,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:54:47,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:54:47,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:54:47" (1/1) ... [2021-11-20 23:54:47,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ee68a71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:47, skipping insertion in model container [2021-11-20 23:54:47,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:54:47" (1/1) ... [2021-11-20 23:54:47,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:54:47,464 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:54:47,618 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_a5ef58b0-2b43-4510-85e1-32384253cfe2/sv-benchmarks/c/array-industry-pattern/array_mul_init.i[807,820] [2021-11-20 23:54:47,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:54:47,645 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:54:47,656 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_a5ef58b0-2b43-4510-85e1-32384253cfe2/sv-benchmarks/c/array-industry-pattern/array_mul_init.i[807,820] [2021-11-20 23:54:47,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:54:47,676 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:54:47,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:47 WrapperNode [2021-11-20 23:54:47,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:54:47,678 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:54:47,678 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:54:47,678 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:54:47,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:47" (1/1) ... [2021-11-20 23:54:47,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:47" (1/1) ... [2021-11-20 23:54:47,716 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2021-11-20 23:54:47,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:54:47,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:54:47,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:54:47,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:54:47,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:47" (1/1) ... [2021-11-20 23:54:47,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:47" (1/1) ... [2021-11-20 23:54:47,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:47" (1/1) ... [2021-11-20 23:54:47,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:47" (1/1) ... [2021-11-20 23:54:47,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:47" (1/1) ... [2021-11-20 23:54:47,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:47" (1/1) ... [2021-11-20 23:54:47,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:47" (1/1) ... [2021-11-20 23:54:47,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:54:47,773 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:54:47,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:54:47,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:54:47,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:47" (1/1) ... [2021-11-20 23:54:47,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:54:47,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:54:47,814 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:54:47,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:54:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:54:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:54:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:54:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:54:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:54:47,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:54:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:54:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:54:47,933 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:54:47,934 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:54:48,055 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:54:48,104 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:54:48,104 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 23:54:48,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:54:48 BoogieIcfgContainer [2021-11-20 23:54:48,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:54:48,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:54:48,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:54:48,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:54:48,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:54:47" (1/3) ... [2021-11-20 23:54:48,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51163eb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:54:48, skipping insertion in model container [2021-11-20 23:54:48,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:54:47" (2/3) ... [2021-11-20 23:54:48,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51163eb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:54:48, skipping insertion in model container [2021-11-20 23:54:48,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:54:48" (3/3) ... [2021-11-20 23:54:48,116 INFO L111 eAbstractionObserver]: Analyzing ICFG array_mul_init.i [2021-11-20 23:54:48,121 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:54:48,121 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:54:48,190 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:54:48,202 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:54:48,202 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:54:48,232 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:54:48,242 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:48,242 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:54:48,243 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:48,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1244850581, now seen corresponding path program 1 times [2021-11-20 23:54:48,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:48,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150511631] [2021-11-20 23:54:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:48,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:48,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:54:48,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:48,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150511631] [2021-11-20 23:54:48,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150511631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:54:48,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:54:48,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:54:48,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379653847] [2021-11-20 23:54:48,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:54:48,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:54:48,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:48,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:54:48,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:54:48,541 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 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) 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) [2021-11-20 23:54:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:48,638 INFO L93 Difference]: Finished difference Result 23 states and 32 transitions. [2021-11-20 23:54:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:54:48,641 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 [2021-11-20 23:54:48,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:48,649 INFO L225 Difference]: With dead ends: 23 [2021-11-20 23:54:48,650 INFO L226 Difference]: Without dead ends: 15 [2021-11-20 23:54:48,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:54:48,657 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:48,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:54:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-20 23:54:48,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2021-11-20 23:54:48,690 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) [2021-11-20 23:54:48,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-20 23:54:48,692 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2021-11-20 23:54:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:48,692 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-20 23:54:48,692 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) [2021-11-20 23:54:48,693 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-20 23:54:48,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:54:48,693 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:48,693 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:48,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:54:48,694 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:48,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:48,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1704292246, now seen corresponding path program 1 times [2021-11-20 23:54:48,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:48,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999486630] [2021-11-20 23:54:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:48,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:48,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:54:48,771 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:48,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999486630] [2021-11-20 23:54:48,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999486630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:54:48,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772592741] [2021-11-20 23:54:48,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:48,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:54:48,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:54:48,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:54:48,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:54:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:48,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 23:54:48,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:54:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:54:48,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:54:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 23:54:48,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772592741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:54:48,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1042826665] [2021-11-20 23:54:49,003 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:54:49,003 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:54:49,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:54:49,037 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:54:49,040 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:54:49,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:49,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:49,300 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-20 23:54:49,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-20 23:54:49,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:49,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:49,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:49,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:49,439 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 23:54:49,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-20 23:54:49,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:49,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:49,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-20 23:54:49,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:49,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:49,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:49,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:49,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:49,995 INFO L354 Elim1Store]: treesize reduction 264, result has 15.4 percent of original size [2021-11-20 23:54:49,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 252 treesize of output 248 [2021-11-20 23:54:50,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:50,712 INFO L354 Elim1Store]: treesize reduction 24, result has 36.8 percent of original size [2021-11-20 23:54:50,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2021-11-20 23:54:50,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:50,901 INFO L354 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2021-11-20 23:54:50,902 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 1 case distinctions, treesize of input 29 treesize of output 21 [2021-11-20 23:54:51,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:51,138 INFO L354 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2021-11-20 23:54:51,139 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 1 case distinctions, treesize of input 44 treesize of output 31 [2021-11-20 23:54:51,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:51,357 INFO L354 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2021-11-20 23:54:51,358 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 1 case distinctions, treesize of input 44 treesize of output 31 [2021-11-20 23:54:52,041 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:54:52,268 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:54:52,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:54:52,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-11-20 23:54:52,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448373552] [2021-11-20 23:54:52,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:54:52,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 23:54:52,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:52,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 23:54:52,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:54:52,272 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:52,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:52,348 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-11-20 23:54:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:54:52,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 23:54:52,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:52,350 INFO L225 Difference]: With dead ends: 39 [2021-11-20 23:54:52,350 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 23:54:52,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=60, Unknown=0, NotChecked=0, Total=110 [2021-11-20 23:54:52,353 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:52,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 15 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:54:52,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 23:54:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 16. [2021-11-20 23:54:52,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-20 23:54:52,359 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2021-11-20 23:54:52,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:52,360 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-20 23:54:52,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:52,360 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-20 23:54:52,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 23:54:52,361 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:52,361 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:52,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:54:52,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:54:52,587 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:52,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:52,588 INFO L85 PathProgramCache]: Analyzing trace with hash -2029215189, now seen corresponding path program 2 times [2021-11-20 23:54:52,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:52,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606594333] [2021-11-20 23:54:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:52,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:52,625 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:54:52,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559507224] [2021-11-20 23:54:52,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:54:52,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:54:52,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:54:52,627 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:54:52,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:54:52,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 23:54:52,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:54:52,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 23:54:52,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:54:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:54:52,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:54:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:54:52,879 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:52,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606594333] [2021-11-20 23:54:52,880 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:54:52,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559507224] [2021-11-20 23:54:52,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559507224] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:54:52,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [221561387] [2021-11-20 23:54:52,884 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:54:52,884 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:54:52,884 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:54:52,885 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:54:52,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:54:52,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:52,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:52,984 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-20 23:54:52,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-20 23:54:53,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:53,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:53,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:53,117 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 23:54:53,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-20 23:54:53,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:53,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:53,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2021-11-20 23:54:53,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:53,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:53,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:53,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:53,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:53,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:53,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:53,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:53,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:53,413 INFO L354 Elim1Store]: treesize reduction 148, result has 12.9 percent of original size [2021-11-20 23:54:53,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 270 treesize of output 254 [2021-11-20 23:54:53,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:53,717 INFO L354 Elim1Store]: treesize reduction 24, result has 36.8 percent of original size [2021-11-20 23:54:53,717 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 1 case distinctions, treesize of input 48 treesize of output 29 [2021-11-20 23:54:53,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:53,873 INFO L354 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2021-11-20 23:54:53,874 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 1 case distinctions, treesize of input 44 treesize of output 31 [2021-11-20 23:54:54,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:54,042 INFO L354 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2021-11-20 23:54:54,043 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 1 case distinctions, treesize of input 44 treesize of output 31 [2021-11-20 23:54:54,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:54,150 INFO L354 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2021-11-20 23:54:54,152 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 1 case distinctions, treesize of input 44 treesize of output 31 [2021-11-20 23:54:54,790 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:54:55,011 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:54:55,011 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:54:55,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-11-20 23:54:55,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011413761] [2021-11-20 23:54:55,012 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:54:55,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:54:55,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:55,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:54:55,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:54:55,014 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:55,135 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2021-11-20 23:54:55,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 23:54:55,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 23:54:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:55,137 INFO L225 Difference]: With dead ends: 84 [2021-11-20 23:54:55,137 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 23:54:55,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=130, Unknown=0, NotChecked=0, Total=240 [2021-11-20 23:54:55,139 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:55,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 30 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:54:55,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 23:54:55,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 28. [2021-11-20 23:54:55,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-20 23:54:55,147 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-11-20 23:54:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:55,148 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-20 23:54:55,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:55,148 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-20 23:54:55,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-20 23:54:55,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:55,149 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:55,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:54:55,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:54:55,363 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:55,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:55,364 INFO L85 PathProgramCache]: Analyzing trace with hash -768544821, now seen corresponding path program 3 times [2021-11-20 23:54:55,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:55,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890718100] [2021-11-20 23:54:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:55,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:55,392 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:54:55,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1387927297] [2021-11-20 23:54:55,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:54:55,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:54:55,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:54:55,394 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:54:55,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:54:55,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:54:55,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:54:55,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 23:54:55,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:54:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-20 23:54:55,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:54:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-20 23:54:55,847 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:55,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890718100] [2021-11-20 23:54:55,850 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:54:55,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387927297] [2021-11-20 23:54:55,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387927297] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:54:55,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [171165285] [2021-11-20 23:54:55,853 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:54:55,853 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:54:55,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:54:55,854 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:54:55,854 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:54:55,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:55,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:55,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:55,920 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 23:54:55,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-20 23:54:55,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:55,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:55,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-20 23:54:56,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:56,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:56,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 49 [2021-11-20 23:54:56,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:56,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:56,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:56,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:56,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:56,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:56,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:56,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:56,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:56,244 INFO L354 Elim1Store]: treesize reduction 148, result has 12.9 percent of original size [2021-11-20 23:54:56,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 270 treesize of output 254 [2021-11-20 23:54:56,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:56,559 INFO L354 Elim1Store]: treesize reduction 24, result has 36.8 percent of original size [2021-11-20 23:54:56,559 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 1 case distinctions, treesize of input 48 treesize of output 29 [2021-11-20 23:54:56,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:56,677 INFO L354 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2021-11-20 23:54:56,678 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 1 case distinctions, treesize of input 29 treesize of output 21 [2021-11-20 23:54:56,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:56,806 INFO L354 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2021-11-20 23:54:56,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2021-11-20 23:54:56,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:54:56,937 INFO L354 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2021-11-20 23:54:56,938 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 1 case distinctions, treesize of input 44 treesize of output 31 [2021-11-20 23:54:57,548 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:54:57,786 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:54:57,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:54:57,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2021-11-20 23:54:57,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740127703] [2021-11-20 23:54:57,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:54:57,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 23:54:57,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:54:57,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 23:54:57,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=400, Unknown=0, NotChecked=0, Total=756 [2021-11-20 23:54:57,788 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:58,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:54:58,095 INFO L93 Difference]: Finished difference Result 174 states and 201 transitions. [2021-11-20 23:54:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-20 23:54:58,096 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-20 23:54:58,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:54:58,098 INFO L225 Difference]: With dead ends: 174 [2021-11-20 23:54:58,099 INFO L226 Difference]: Without dead ends: 158 [2021-11-20 23:54:58,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=356, Invalid=400, Unknown=0, NotChecked=0, Total=756 [2021-11-20 23:54:58,101 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 244 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:54:58,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 66 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:54:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-20 23:54:58,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 52. [2021-11-20 23:54:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:58,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-11-20 23:54:58,125 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 26 [2021-11-20 23:54:58,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:54:58,125 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-11-20 23:54:58,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:54:58,126 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-11-20 23:54:58,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 23:54:58,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:54:58,132 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-11-20 23:54:58,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:54:58,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:54:58,356 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:54:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:54:58,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1049894133, now seen corresponding path program 4 times [2021-11-20 23:54:58,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:54:58,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750736273] [2021-11-20 23:54:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:54:58,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:54:58,400 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:54:58,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405823845] [2021-11-20 23:54:58,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 23:54:58,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:54:58,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:54:58,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:54:58,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:54:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:54:58,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-20 23:54:58,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:54:58,907 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-20 23:54:58,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:54:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-20 23:54:59,682 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:54:59,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750736273] [2021-11-20 23:54:59,682 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 23:54:59,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405823845] [2021-11-20 23:54:59,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405823845] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:54:59,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2065154080] [2021-11-20 23:54:59,685 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-20 23:54:59,685 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:54:59,686 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:54:59,686 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:54:59,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:54:59,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:59,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:59,757 INFO L354 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2021-11-20 23:54:59,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2021-11-20 23:54:59,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:59,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:59,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:59,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:59,845 INFO L354 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2021-11-20 23:54:59,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2021-11-20 23:54:59,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:59,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:54:59,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2021-11-20 23:55:00,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:00,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:55:00,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:00,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:00,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:00,104 INFO L354 Elim1Store]: treesize reduction 264, result has 15.4 percent of original size [2021-11-20 23:55:00,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 252 treesize of output 248 [2021-11-20 23:55:00,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:00,553 INFO L354 Elim1Store]: treesize reduction 24, result has 36.8 percent of original size [2021-11-20 23:55:00,553 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 1 case distinctions, treesize of input 48 treesize of output 29 [2021-11-20 23:55:00,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:00,649 INFO L354 Elim1Store]: treesize reduction 15, result has 42.3 percent of original size [2021-11-20 23:55:00,650 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 1 case distinctions, treesize of input 29 treesize of output 21 [2021-11-20 23:55:00,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:00,769 INFO L354 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2021-11-20 23:55:00,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 31 [2021-11-20 23:55:00,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:55:00,909 INFO L354 Elim1Store]: treesize reduction 20, result has 44.4 percent of original size [2021-11-20 23:55:00,910 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 1 case distinctions, treesize of input 44 treesize of output 31 [2021-11-20 23:55:01,413 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:55:01,611 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:55:01,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:55:01,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2021-11-20 23:55:01,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161811931] [2021-11-20 23:55:01,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:55:01,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 23:55:01,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:55:01,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 23:55:01,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1280, Invalid=1372, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 23:55:01,614 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:55:02,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:55:02,380 INFO L93 Difference]: Finished difference Result 354 states and 405 transitions. [2021-11-20 23:55:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-20 23:55:02,381 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-20 23:55:02,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:55:02,385 INFO L225 Difference]: With dead ends: 354 [2021-11-20 23:55:02,385 INFO L226 Difference]: Without dead ends: 326 [2021-11-20 23:55:02,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1280, Invalid=1372, Unknown=0, NotChecked=0, Total=2652 [2021-11-20 23:55:02,388 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 720 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:55:02,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 138 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 23:55:02,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-20 23:55:02,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 100. [2021-11-20 23:55:02,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:55:02,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2021-11-20 23:55:02,404 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 50 [2021-11-20 23:55:02,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:55:02,405 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2021-11-20 23:55:02,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:55:02,405 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2021-11-20 23:55:02,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-20 23:55:02,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:55:02,409 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2021-11-20 23:55:02,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:55:02,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:55:02,624 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:55:02,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:55:02,625 INFO L85 PathProgramCache]: Analyzing trace with hash -129816181, now seen corresponding path program 5 times [2021-11-20 23:55:02,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:55:02,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436978892] [2021-11-20 23:55:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:55:02,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:55:02,687 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 23:55:02,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105911211] [2021-11-20 23:55:02,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:55:02,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:55:02,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:55:02,689 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:55:02,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a5ef58b0-2b43-4510-85e1-32384253cfe2/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process