./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s4if.c --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_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/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_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s4if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/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_3d83760b-f215-498a-9370-30e042acfbe7/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 5fe0a71bff946f0cc68d0dab1416e0ef991c6bf06ad7cbb70643ca18073a3c7e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:35:40,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:35:40,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:35:40,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:35:40,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:35:40,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:35:40,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:35:40,827 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:35:40,828 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:35:40,829 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:35:40,831 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:35:40,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:35:40,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:35:40,834 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:35:40,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:35:40,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:35:40,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:35:40,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:35:40,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:35:40,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:35:40,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:35:40,848 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:35:40,849 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:35:40,850 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:35:40,854 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:35:40,854 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:35:40,855 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:35:40,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:35:40,856 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:35:40,857 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:35:40,858 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:35:40,859 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:35:40,861 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:35:40,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:35:40,864 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:35:40,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:35:40,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:35:40,865 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:35:40,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:35:40,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:35:40,867 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:35:40,868 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 01:35:40,896 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:35:40,896 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:35:40,897 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:35:40,897 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:35:40,897 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:35:40,898 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:35:40,898 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:35:40,898 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:35:40,898 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:35:40,898 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:35:40,899 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:35:40,899 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:35:40,899 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:35:40,899 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:35:40,899 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:35:40,900 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:35:40,900 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:35:40,900 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:35:40,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:35:40,901 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 01:35:40,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:35:40,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 01:35:40,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:35:40,902 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:35:40,902 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:35:40,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:35:40,902 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 01:35:40,903 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:35:40,903 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:35:40,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:35:40,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:35:40,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:35:40,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:35:40,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:35:40,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:35:40,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:35:40,904 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:35:40,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:35:40,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:35:40,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:35:40,905 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:35:40,905 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_3d83760b-f215-498a-9370-30e042acfbe7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fe0a71bff946f0cc68d0dab1416e0ef991c6bf06ad7cbb70643ca18073a3c7e [2021-11-21 01:35:41,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:35:41,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:35:41,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:35:41,200 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:35:41,201 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:35:41,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-fpi/s4if.c [2021-11-21 01:35:41,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/data/ffcdf6777/e4aadd75f9b74b76a174ebbd42a0a359/FLAG6f72e9fe5 [2021-11-21 01:35:41,779 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:35:41,780 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/sv-benchmarks/c/array-fpi/s4if.c [2021-11-21 01:35:41,786 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/data/ffcdf6777/e4aadd75f9b74b76a174ebbd42a0a359/FLAG6f72e9fe5 [2021-11-21 01:35:42,132 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/data/ffcdf6777/e4aadd75f9b74b76a174ebbd42a0a359 [2021-11-21 01:35:42,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:35:42,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:35:42,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:35:42,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:35:42,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:35:42,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:35:42" (1/1) ... [2021-11-21 01:35:42,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61579104 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:42, skipping insertion in model container [2021-11-21 01:35:42,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:35:42" (1/1) ... [2021-11-21 01:35:42,163 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:35:42,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:35:42,379 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_3d83760b-f215-498a-9370-30e042acfbe7/sv-benchmarks/c/array-fpi/s4if.c[587,600] [2021-11-21 01:35:42,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:35:42,446 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:35:42,468 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_3d83760b-f215-498a-9370-30e042acfbe7/sv-benchmarks/c/array-fpi/s4if.c[587,600] [2021-11-21 01:35:42,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:35:42,495 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:35:42,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:42 WrapperNode [2021-11-21 01:35:42,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:35:42,497 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:35:42,497 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:35:42,498 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:35:42,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:42" (1/1) ... [2021-11-21 01:35:42,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:42" (1/1) ... [2021-11-21 01:35:42,539 INFO L137 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2021-11-21 01:35:42,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:35:42,543 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:35:42,543 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:35:42,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:35:42,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:42" (1/1) ... [2021-11-21 01:35:42,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:42" (1/1) ... [2021-11-21 01:35:42,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:42" (1/1) ... [2021-11-21 01:35:42,576 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:42" (1/1) ... [2021-11-21 01:35:42,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:42" (1/1) ... [2021-11-21 01:35:42,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:42" (1/1) ... [2021-11-21 01:35:42,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:42" (1/1) ... [2021-11-21 01:35:42,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:35:42,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:35:42,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:35:42,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:35:42,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:42" (1/1) ... [2021-11-21 01:35:42,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:35:42,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:42,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:35:42,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:35:42,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:35:42,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:35:42,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:35:42,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:35:42,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:35:42,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:35:42,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:35:42,740 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:35:42,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:35:42,834 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:35:42,836 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:35:43,029 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:35:43,074 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:35:43,074 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-21 01:35:43,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:35:43 BoogieIcfgContainer [2021-11-21 01:35:43,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:35:43,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:35:43,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:35:43,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:35:43,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:35:42" (1/3) ... [2021-11-21 01:35:43,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f76edf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:35:43, skipping insertion in model container [2021-11-21 01:35:43,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:35:42" (2/3) ... [2021-11-21 01:35:43,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f76edf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:35:43, skipping insertion in model container [2021-11-21 01:35:43,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:35:43" (3/3) ... [2021-11-21 01:35:43,087 INFO L111 eAbstractionObserver]: Analyzing ICFG s4if.c [2021-11-21 01:35:43,094 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:35:43,094 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:35:43,150 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:35:43,159 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 [2021-11-21 01:35:43,159 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:35:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:43,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-21 01:35:43,182 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:43,183 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-21 01:35:43,184 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:43,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:43,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1569409207, now seen corresponding path program 1 times [2021-11-21 01:35:43,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:43,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195756416] [2021-11-21 01:35:43,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:43,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:43,423 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:43,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195756416] [2021-11-21 01:35:43,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195756416] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:43,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:43,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:35:43,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64925468] [2021-11-21 01:35:43,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:43,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:35:43,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:43,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:35:43,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:35:43,468 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-21 01:35:43,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:43,548 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-11-21 01:35:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:35:43,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2021-11-21 01:35:43,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:43,560 INFO L225 Difference]: With dead ends: 18 [2021-11-21 01:35:43,573 INFO L226 Difference]: Without dead ends: 8 [2021-11-21 01:35:43,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:35:43,581 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:43,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:35:43,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-11-21 01:35:43,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-11-21 01:35:43,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:43,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-11-21 01:35:43,642 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-11-21 01:35:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:43,642 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-11-21 01:35:43,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2021-11-21 01:35:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-11-21 01:35:43,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 01:35:43,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:43,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:43,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:35:43,648 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:43,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:43,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1413550180, now seen corresponding path program 1 times [2021-11-21 01:35:43,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:43,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631076444] [2021-11-21 01:35:43,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:43,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 01:35:43,758 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:43,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631076444] [2021-11-21 01:35:43,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631076444] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:35:43,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:35:43,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:35:43,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512085749] [2021-11-21 01:35:43,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:35:43,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:35:43,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:43,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:35:43,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:35:43,763 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:43,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:43,791 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-11-21 01:35:43,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:35:43,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 01:35:43,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:43,793 INFO L225 Difference]: With dead ends: 12 [2021-11-21 01:35:43,793 INFO L226 Difference]: Without dead ends: 9 [2021-11-21 01:35:43,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:35:43,796 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:43,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 01:35:43,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-21 01:35:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-21 01:35:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-11-21 01:35:43,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-11-21 01:35:43,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:43,802 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-11-21 01:35:43,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-11-21 01:35:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 01:35:43,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:43,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:43,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:35:43,804 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:43,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:43,805 INFO L85 PathProgramCache]: Analyzing trace with hash -870274037, now seen corresponding path program 1 times [2021-11-21 01:35:43,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:43,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649492963] [2021-11-21 01:35:43,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:43,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:43,858 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:35:43,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750105324] [2021-11-21 01:35:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:43,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:43,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:43,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:43,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:35:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:43,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-21 01:35:43,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:44,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-21 01:35:44,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:35:44,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-21 01:35:44,448 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-21 01:35:44,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 27 [2021-11-21 01:35:44,663 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 01:35:44,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 40 [2021-11-21 01:35:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:44,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:45,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:45,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649492963] [2021-11-21 01:35:45,241 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:35:45,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750105324] [2021-11-21 01:35:45,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750105324] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:45,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1766633406] [2021-11-21 01:35:45,277 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:35:45,277 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:35:45,287 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:35:45,294 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:35:45,294 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:35:45,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:45,558 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 01:35:45,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-21 01:35:45,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:45,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:45,720 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-21 01:35:45,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-21 01:35:45,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:45,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:45,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:45,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:45,963 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:35:45,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:35:46,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:35:46,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:46,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-21 01:35:46,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:35:46,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:46,574 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:35:46,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 01:35:46,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:46,630 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:35:46,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-21 01:35:46,998 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:35:46,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:35:47,358 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:35:47,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:35:47,788 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:35:48,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:35:48,171 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:35:48,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-21 01:35:48,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143151206] [2021-11-21 01:35:48,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:48,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:35:48,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:48,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:35:48,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:35:48,175 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:48,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:48,254 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-11-21 01:35:48,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:35:48,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-21 01:35:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:48,256 INFO L225 Difference]: With dead ends: 15 [2021-11-21 01:35:48,256 INFO L226 Difference]: Without dead ends: 12 [2021-11-21 01:35:48,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:35:48,258 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:48,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2021-11-21 01:35:48,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-21 01:35:48,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-21 01:35:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 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) [2021-11-21 01:35:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-21 01:35:48,270 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-21 01:35:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:48,270 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-21 01:35:48,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:48,271 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-21 01:35:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:35:48,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:48,271 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:48,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:48,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-21 01:35:48,489 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:48,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:48,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1208582788, now seen corresponding path program 2 times [2021-11-21 01:35:48,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:48,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745667949] [2021-11-21 01:35:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:48,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:48,517 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:35:48,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006387792] [2021-11-21 01:35:48,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:35:48,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:48,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:48,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:48,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:35:48,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 01:35:48,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:35:48,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:35:48,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:48,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:48,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:48,748 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:48,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745667949] [2021-11-21 01:35:48,748 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:35:48,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006387792] [2021-11-21 01:35:48,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006387792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:48,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1008053124] [2021-11-21 01:35:48,764 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:35:48,765 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:35:48,765 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:35:48,765 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:35:48,766 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:35:48,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:48,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:48,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:48,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:48,985 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:35:48,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:35:49,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:49,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-21 01:35:49,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:49,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:49,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 11 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:35:49,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:49,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:49,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:49,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:49,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:49,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-21 01:35:49,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:49,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:49,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:49,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:49,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:49,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:49,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:49,638 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-21 01:35:49,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 385 treesize of output 380 [2021-11-21 01:35:50,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:35:50,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:50,479 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:35:50,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-21 01:35:50,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:50,665 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:35:50,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 01:35:50,782 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:35:50,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:35:50,864 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:35:50,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:35:51,485 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:35:51,740 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:35:51,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:35:51,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-21 01:35:51,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252826725] [2021-11-21 01:35:51,741 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:51,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 01:35:51,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:51,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 01:35:51,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-21 01:35:51,743 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.5) 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) [2021-11-21 01:35:51,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:51,845 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-11-21 01:35:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 01:35:51,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) 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) Word has length 9 [2021-11-21 01:35:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:51,847 INFO L225 Difference]: With dead ends: 20 [2021-11-21 01:35:51,847 INFO L226 Difference]: Without dead ends: 14 [2021-11-21 01:35:51,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:35:51,849 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:51,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 10 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:35:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-21 01:35:51,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2021-11-21 01:35:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-21 01:35:51,854 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2021-11-21 01:35:51,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:51,855 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-21 01:35:51,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) 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) [2021-11-21 01:35:51,855 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-21 01:35:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 01:35:51,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:51,856 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:51,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-21 01:35:52,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:52,081 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:52,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:52,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1413604450, now seen corresponding path program 3 times [2021-11-21 01:35:52,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:52,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448244366] [2021-11-21 01:35:52,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:52,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:52,102 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:35:52,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497413327] [2021-11-21 01:35:52,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:35:52,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:52,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:52,113 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:52,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 01:35:52,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:35:52,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:35:52,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 01:35:52,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:52,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:35:52,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:52,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:35:52,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448244366] [2021-11-21 01:35:52,317 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:35:52,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497413327] [2021-11-21 01:35:52,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497413327] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:35:52,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1338498936] [2021-11-21 01:35:52,322 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:35:52,322 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:35:52,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:35:52,323 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:35:52,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:35:52,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:52,463 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 01:35:52,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 22 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-21 01:35:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:52,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:52,639 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-21 01:35:52,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-21 01:35:52,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:52,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:52,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:52,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:52,840 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:35:52,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:35:52,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:35:53,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:53,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-21 01:35:53,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:35:53,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:53,329 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:35:53,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 01:35:53,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:35:53,391 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:35:53,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-21 01:35:53,735 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:35:53,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:35:54,085 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:35:54,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:35:54,431 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:35:54,704 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:35:54,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:35:54,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-21 01:35:54,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6465397] [2021-11-21 01:35:54,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:35:54,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 01:35:54,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:35:54,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 01:35:54,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-21 01:35:54,706 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 9 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) [2021-11-21 01:35:54,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:35:54,826 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-11-21 01:35:54,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 01:35:54,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 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) Word has length 9 [2021-11-21 01:35:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:35:54,827 INFO L225 Difference]: With dead ends: 14 [2021-11-21 01:35:54,827 INFO L226 Difference]: Without dead ends: 11 [2021-11-21 01:35:54,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-21 01:35:54,828 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:35:54,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:35:54,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-21 01:35:54,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-21 01:35:54,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:35:54,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-11-21 01:35:54,833 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-11-21 01:35:54,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:35:54,833 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-11-21 01:35:54,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 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) [2021-11-21 01:35:54,834 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-11-21 01:35:54,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 01:35:54,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:35:54,835 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 01:35:54,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 01:35:55,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:55,045 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:35:55,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:35:55,046 INFO L85 PathProgramCache]: Analyzing trace with hash -871956407, now seen corresponding path program 4 times [2021-11-21 01:35:55,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:35:55,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945755253] [2021-11-21 01:35:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:35:55,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:35:55,057 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:35:55,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444469452] [2021-11-21 01:35:55,057 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:35:55,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:35:55,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:35:55,068 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:35:55,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 01:35:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:35:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-21 01:35:55,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:35:55,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-21 01:35:55,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:35:55,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-21 01:35:55,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:55,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-21 01:35:55,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:35:55,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-11-21 01:35:55,472 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-11-21 01:35:55,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 37 [2021-11-21 01:35:55,577 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 01:35:55,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 45 [2021-11-21 01:35:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:35:55,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:06,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:06,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945755253] [2021-11-21 01:36:06,903 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:36:06,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444469452] [2021-11-21 01:36:06,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444469452] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:06,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1044029962] [2021-11-21 01:36:06,906 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:36:06,907 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:36:06,907 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:36:06,907 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:36:06,907 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:36:07,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,136 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:36:07,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:36:07,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:36:07,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-21 01:36:07,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-21 01:36:07,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:07,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:07,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:07,839 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-21 01:36:07,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 381 treesize of output 376 [2021-11-21 01:36:08,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:36:08,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:08,958 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:36:08,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-21 01:36:09,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:09,153 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:36:09,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 01:36:09,316 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:36:09,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:36:09,887 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:36:09,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:36:10,236 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:36:10,856 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:36:10,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:36:10,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-21 01:36:10,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533327218] [2021-11-21 01:36:10,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:36:10,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 01:36:10,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:10,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 01:36:10,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:36:10,859 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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) [2021-11-21 01:36:15,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:15,098 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-11-21 01:36:15,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:36:15,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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 10 [2021-11-21 01:36:15,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:15,099 INFO L225 Difference]: With dead ends: 18 [2021-11-21 01:36:15,099 INFO L226 Difference]: Without dead ends: 15 [2021-11-21 01:36:15,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:36:15,101 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:15,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 9 Unchecked, 0.4s Time] [2021-11-21 01:36:15,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-21 01:36:15,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2021-11-21 01:36:15,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-11-21 01:36:15,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-11-21 01:36:15,108 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2021-11-21 01:36:15,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:15,109 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-11-21 01:36:15,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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) [2021-11-21 01:36:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-11-21 01:36:15,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:36:15,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:15,110 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:15,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:15,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:15,313 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:15,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1260736258, now seen corresponding path program 5 times [2021-11-21 01:36:15,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:15,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816661666] [2021-11-21 01:36:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:15,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:15,328 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:36:15,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589137579] [2021-11-21 01:36:15,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:36:15,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:15,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:15,330 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:15,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 01:36:15,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:36:15,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:36:15,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:36:15,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:15,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:15,535 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:15,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816661666] [2021-11-21 01:36:15,536 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:36:15,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589137579] [2021-11-21 01:36:15,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589137579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:15,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [103862248] [2021-11-21 01:36:15,538 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:36:15,539 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:36:15,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:36:15,539 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:36:15,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:36:15,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:15,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:15,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:15,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:15,747 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:36:15,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:36:15,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:15,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-21 01:36:15,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:15,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:15,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:36:16,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 113 [2021-11-21 01:36:16,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:16,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:16,453 INFO L354 Elim1Store]: treesize reduction 220, result has 11.6 percent of original size [2021-11-21 01:36:16,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 32 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 383 treesize of output 372 [2021-11-21 01:36:17,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:36:17,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:17,185 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 01:36:17,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-21 01:36:17,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:17,433 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 01:36:17,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-21 01:36:17,544 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:36:17,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:36:17,647 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:36:17,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:36:18,199 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:36:18,373 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:36:18,373 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:36:18,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-21 01:36:18,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704791667] [2021-11-21 01:36:18,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:36:18,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 01:36:18,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:18,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 01:36:18,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-11-21 01:36:18,375 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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) [2021-11-21 01:36:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:18,477 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-11-21 01:36:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-21 01:36:18,478 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 01:36:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:18,478 INFO L225 Difference]: With dead ends: 23 [2021-11-21 01:36:18,478 INFO L226 Difference]: Without dead ends: 16 [2021-11-21 01:36:18,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:36:18,480 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:18,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:36:18,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-21 01:36:18,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2021-11-21 01:36:18,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-11-21 01:36:18,486 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2021-11-21 01:36:18,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:18,486 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-11-21 01:36:18,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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) [2021-11-21 01:36:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-11-21 01:36:18,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 01:36:18,488 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:18,488 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:18,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 01:36:18,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 01:36:18,705 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:18,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:18,706 INFO L85 PathProgramCache]: Analyzing trace with hash 973526812, now seen corresponding path program 6 times [2021-11-21 01:36:18,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:18,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802845143] [2021-11-21 01:36:18,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:18,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:18,728 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:36:18,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131812671] [2021-11-21 01:36:18,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:36:18,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:18,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:18,736 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:18,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 01:36:18,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:36:18,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:36:18,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 01:36:18,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:18,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:36:18,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:18,994 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:36:18,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802845143] [2021-11-21 01:36:18,994 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:36:18,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131812671] [2021-11-21 01:36:18,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131812671] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:36:18,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [415921285] [2021-11-21 01:36:18,998 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:36:18,998 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:36:18,998 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:36:18,999 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:36:18,999 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:36:19,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,141 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-21 01:36:19,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-21 01:36:19,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,252 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:36:19,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:36:19,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 25 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-21 01:36:19,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-21 01:36:19,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:19,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:19,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:19,921 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-21 01:36:19,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 381 treesize of output 376 [2021-11-21 01:36:20,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:36:20,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:20,755 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 01:36:20,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-21 01:36:20,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:20,826 INFO L354 Elim1Store]: treesize reduction 19, result has 56.8 percent of original size [2021-11-21 01:36:20,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 38 [2021-11-21 01:36:21,157 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:36:21,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:36:21,565 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:36:21,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:36:21,874 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:36:22,091 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:36:22,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:36:22,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-21 01:36:22,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826176480] [2021-11-21 01:36:22,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:36:22,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-21 01:36:22,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:36:22,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-21 01:36:22,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-11-21 01:36:22,094 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-11-21 01:36:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:36:22,211 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-11-21 01:36:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 01:36:22,212 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 01:36:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:36:22,213 INFO L225 Difference]: With dead ends: 16 [2021-11-21 01:36:22,213 INFO L226 Difference]: Without dead ends: 13 [2021-11-21 01:36:22,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-11-21 01:36:22,214 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:36:22,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:36:22,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-21 01:36:22,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-21 01:36:22,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 01:36:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-11-21 01:36:22,221 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-11-21 01:36:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:36:22,221 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-11-21 01:36:22,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2021-11-21 01:36:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-11-21 01:36:22,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 01:36:22,222 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:36:22,222 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-11-21 01:36:22,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-21 01:36:22,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-21 01:36:22,437 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:36:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:36:22,438 INFO L85 PathProgramCache]: Analyzing trace with hash 114668683, now seen corresponding path program 7 times [2021-11-21 01:36:22,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:36:22,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680967251] [2021-11-21 01:36:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:36:22,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:36:22,450 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:36:22,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [584924872] [2021-11-21 01:36:22,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:36:22,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:36:22,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:36:22,468 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:36:22,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 01:36:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:36:22,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-21 01:36:22,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:36:22,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-21 01:36:22,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:36:22,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2021-11-21 01:36:22,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:22,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 38 [2021-11-21 01:36:22,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:22,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:22,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:22,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-21 01:36:22,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:22,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:22,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:22,756 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 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-21 01:36:22,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:22,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:22,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:22,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:36:22,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:22,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 115 [2021-11-21 01:36:22,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:22,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:22,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:36:22,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 67 [2021-11-21 01:36:23,021 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-11-21 01:36:23,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 60 treesize of output 49 [2021-11-21 01:36:23,101 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-21 01:36:23,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 46 [2021-11-21 01:36:23,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:36:23,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:37:22,569 WARN L227 SmtUtils]: Spent 34.27s on a formula simplification that was a NOOP. DAG size: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:37:42,824 WARN L227 SmtUtils]: Spent 12.87s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:38:31,612 WARN L227 SmtUtils]: Spent 25.13s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:39:11,039 WARN L227 SmtUtils]: Spent 24.20s on a formula simplification that was a NOOP. DAG size: 165 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:40:11,162 WARN L227 SmtUtils]: Spent 37.17s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:40:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:40:11,278 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:40:11,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680967251] [2021-11-21 01:40:11,279 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:40:11,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584924872] [2021-11-21 01:40:11,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584924872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:40:11,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [641732699] [2021-11-21 01:40:11,282 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:40:11,282 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:40:11,282 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:40:11,283 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:40:11,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:40:11,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:11,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:11,463 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-21 01:40:11,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-21 01:40:11,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:11,566 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 01:40:11,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 22 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-21 01:40:11,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:11,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:11,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:11,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:11,729 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:40:11,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:40:11,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:40:11,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:40:11,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 39 [2021-11-21 01:40:12,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:40:12,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:40:12,267 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:40:12,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-21 01:40:12,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:40:12,462 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:40:12,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 01:40:12,606 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:40:12,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:40:12,704 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:40:12,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:40:13,422 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:40:17,297 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:40:17,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:40:17,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-11-21 01:40:17,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939390827] [2021-11-21 01:40:17,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:40:17,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-21 01:40:17,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:40:17,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-21 01:40:17,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=439, Unknown=5, NotChecked=0, Total=506 [2021-11-21 01:40:17,299 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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) [2021-11-21 01:40:20,723 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse0 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~0#1| 0) (= .cse0 0) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (or (let ((.cse4 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse1 (* 4 c_~N~0)) (.cse7 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse12 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (.cse13 (= .cse4 4))) (and (or (let ((.cse11 (+ .cse4 .cse0))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse11)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse12))) (let ((.cse8 (= .cse3 4))) (and (or (let ((.cse2 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse4 .cse3 .cse0))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (let ((.cse5 (= .cse2 4))) (and (or (= .cse1 (+ (* .cse2 .cse0) (* .cse2 .cse3) (* .cse2 .cse4))) .cse5) (or (= .cse1 (+ .cse4 .cse3 .cse2 .cse0)) (not .cse5))))) (not .cse8)) (or (let ((.cse10 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse3 .cse11))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (let ((.cse9 (= .cse10 4))) (and (or (not .cse9) (= (+ .cse10 (* .cse0 .cse3) (* .cse3 .cse4)) .cse1)) (or (= (+ (* .cse10 .cse0 .cse3) (* .cse10 .cse3 .cse4)) .cse1) .cse9)))) .cse8))))) (not .cse13)) (or (let ((.cse18 (* .cse4 .cse0))) (let ((.cse17 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse18)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse12))) (let ((.cse14 (= 4 .cse17))) (and (or .cse14 (let ((.cse16 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse17 .cse18))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (let ((.cse15 (= .cse16 4))) (and (or (not .cse15) (= .cse1 (+ .cse16 (* .cse17 .cse0 .cse4)))) (or (= .cse1 (* .cse16 .cse17 .cse0 .cse4)) .cse15))))) (or (let ((.cse20 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse18 .cse17))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse7))) (let ((.cse19 (= .cse20 4))) (and (or .cse19 (= .cse1 (+ (* .cse0 .cse20 .cse4) (* .cse17 .cse20)))) (or (not .cse19) (= .cse1 (+ (* .cse0 .cse4) .cse20 .cse17)))))) (not .cse14)))))) .cse13)))) (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0))))) is different from true [2021-11-21 01:41:09,319 WARN L227 SmtUtils]: Spent 33.91s on a formula simplification that was a NOOP. DAG size: 184 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:41:09,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:09,325 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2021-11-21 01:41:09,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:41:09,325 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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 12 [2021-11-21 01:41:09,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:09,326 INFO L225 Difference]: With dead ends: 21 [2021-11-21 01:41:09,326 INFO L226 Difference]: Without dead ends: 18 [2021-11-21 01:41:09,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 243.1s TimeCoverageRelationStatistics Valid=69, Invalid=480, Unknown=7, NotChecked=44, Total=600 [2021-11-21 01:41:09,328 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:09,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 100 Invalid, 0 Unknown, 3 Unchecked, 4.5s Time] [2021-11-21 01:41:09,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-21 01:41:09,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2021-11-21 01:41:09,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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) [2021-11-21 01:41:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-21 01:41:09,337 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-11-21 01:41:09,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:09,338 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-21 01:41:09,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 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) [2021-11-21 01:41:09,338 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-21 01:41:09,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:41:09,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:09,339 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:09,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:09,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:09,565 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:09,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:09,566 INFO L85 PathProgramCache]: Analyzing trace with hash -740129540, now seen corresponding path program 8 times [2021-11-21 01:41:09,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:41:09,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078917099] [2021-11-21 01:41:09,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:09,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:41:09,579 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:41:09,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482383971] [2021-11-21 01:41:09,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 01:41:09,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:09,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:09,581 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:41:09,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 01:41:09,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 01:41:09,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:09,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:41:09,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:41:09,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:41:09,837 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:41:09,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078917099] [2021-11-21 01:41:09,837 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:41:09,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482383971] [2021-11-21 01:41:09,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482383971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:09,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075844921] [2021-11-21 01:41:09,839 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:41:09,839 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:41:09,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:41:09,839 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:41:09,840 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:41:09,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:09,922 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 01:41:09,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 23 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 102 [2021-11-21 01:41:09,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:09,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:09,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:10,035 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:41:10,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:41:10,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:10,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:10,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 37 [2021-11-21 01:41:10,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:10,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:10,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:10,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 27 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-21 01:41:10,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:10,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:10,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:10,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:10,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:10,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:10,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:10,526 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-21 01:41:10,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 381 treesize of output 376 [2021-11-21 01:41:11,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:41:11,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:11,247 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:41:11,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 01:41:11,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:11,433 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:41:11,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-21 01:41:11,888 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:41:11,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:41:12,283 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:41:12,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:41:12,653 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:41:12,891 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:41:12,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:41:12,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-11-21 01:41:12,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779215640] [2021-11-21 01:41:12,892 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:41:12,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-21 01:41:12,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:41:12,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-21 01:41:12,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-11-21 01:41:12,893 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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) [2021-11-21 01:41:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:13,022 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-11-21 01:41:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 01:41:13,022 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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) Word has length 13 [2021-11-21 01:41:13,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:13,023 INFO L225 Difference]: With dead ends: 26 [2021-11-21 01:41:13,023 INFO L226 Difference]: Without dead ends: 18 [2021-11-21 01:41:13,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-11-21 01:41:13,024 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:13,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 14 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:41:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-21 01:41:13,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2021-11-21 01:41:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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) [2021-11-21 01:41:13,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-11-21 01:41:13,032 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2021-11-21 01:41:13,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:13,032 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-11-21 01:41:13,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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) [2021-11-21 01:41:13,033 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-11-21 01:41:13,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 01:41:13,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:13,033 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:13,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 01:41:13,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-21 01:41:13,245 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:13,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:13,245 INFO L85 PathProgramCache]: Analyzing trace with hash -197451106, now seen corresponding path program 9 times [2021-11-21 01:41:13,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:41:13,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254286821] [2021-11-21 01:41:13,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:13,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:41:13,257 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:41:13,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031232838] [2021-11-21 01:41:13,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 01:41:13,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:13,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:13,259 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:41:13,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 01:41:13,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 01:41:13,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 01:41:13,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-21 01:41:13,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:41:13,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:41:13,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:41:13,478 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:41:13,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254286821] [2021-11-21 01:41:13,478 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 01:41:13,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031232838] [2021-11-21 01:41:13,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031232838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 01:41:13,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [382305754] [2021-11-21 01:41:13,481 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-11-21 01:41:13,481 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 01:41:13,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 01:41:13,482 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 01:41:13,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 01:41:13,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:13,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:13,660 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-21 01:41:13,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 55 [2021-11-21 01:41:13,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:13,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:13,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:13,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:13,812 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 01:41:13,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 69 [2021-11-21 01:41:13,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:13,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 24 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 98 [2021-11-21 01:41:13,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:13,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:13,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:13,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 28 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 108 [2021-11-21 01:41:14,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:14,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:14,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:14,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:14,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:14,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:14,355 INFO L354 Elim1Store]: treesize reduction 196, result has 17.6 percent of original size [2021-11-21 01:41:14,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 26 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 24 case distinctions, treesize of input 385 treesize of output 380 [2021-11-21 01:41:14,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 01:41:15,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:15,065 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:41:15,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 33 [2021-11-21 01:41:15,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:15,323 INFO L354 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2021-11-21 01:41:15,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 32 [2021-11-21 01:41:15,444 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:41:15,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 01:41:15,550 INFO L354 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2021-11-21 01:41:15,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 58 [2021-11-21 01:41:16,226 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 01:41:16,450 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 01:41:16,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 01:41:16,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-21 01:41:16,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398297226] [2021-11-21 01:41:16,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 01:41:16,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 01:41:16,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:41:16,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 01:41:16,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-21 01:41:16,452 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 15 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) [2021-11-21 01:41:16,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:41:16,600 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-11-21 01:41:16,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 01:41:16,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 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) Word has length 13 [2021-11-21 01:41:16,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:41:16,601 INFO L225 Difference]: With dead ends: 18 [2021-11-21 01:41:16,601 INFO L226 Difference]: Without dead ends: 15 [2021-11-21 01:41:16,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-11-21 01:41:16,603 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 01:41:16,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 8 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 01:41:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-21 01:41:16,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-21 01:41:16,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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) [2021-11-21 01:41:16,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-21 01:41:16,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2021-11-21 01:41:16,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:41:16,612 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-21 01:41:16,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 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) [2021-11-21 01:41:16,613 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-21 01:41:16,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 01:41:16,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:41:16,614 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-21 01:41:16,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-21 01:41:16,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-21 01:41:16,841 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:41:16,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:41:16,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1825908407, now seen corresponding path program 10 times [2021-11-21 01:41:16,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:41:16,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962687454] [2021-11-21 01:41:16,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:41:16,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:41:16,855 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 01:41:16,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766833846] [2021-11-21 01:41:16,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 01:41:16,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:41:16,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:41:16,857 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:41:16,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3d83760b-f215-498a-9370-30e042acfbe7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 01:41:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:41:16,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-21 01:41:16,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:41:16,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-21 01:41:16,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-21 01:41:16,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-21 01:41:16,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:16,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-21 01:41:17,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 48 [2021-11-21 01:41:17,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 54 [2021-11-21 01:41:17,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:17,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 140 [2021-11-21 01:41:17,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 40 [2021-11-21 01:41:17,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:17,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 148 treesize of output 146 [2021-11-21 01:41:17,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 57 [2021-11-21 01:41:17,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 01:41:17,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 156 [2021-11-21 01:41:17,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 01:41:17,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 90 [2021-11-21 01:41:17,782 INFO L354 Elim1Store]: treesize reduction 152, result has 16.0 percent of original size [2021-11-21 01:41:17,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 67 treesize of output 59 [2021-11-21 01:41:17,872 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-21 01:41:17,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 49 [2021-11-21 01:41:17,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 01:41:17,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 01:42:37,295 WARN L227 SmtUtils]: Spent 30.75s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 01:44:01,744 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse48 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse21 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse48)))) (let ((.cse0 (= .cse5 4)) (.cse2 (* 4 c_~N~0)) (.cse22 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse48)) (.cse25 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse48)) (.cse27 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse48 4)) (.cse6 (select .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (and (or (not .cse0) (let ((.cse26 (+ .cse5 .cse6))) (let ((.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse26)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse27))) (let ((.cse24 (+ .cse5 .cse6 .cse4)) (.cse23 (* .cse4 .cse26))) (let ((.cse11 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse23)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25)) (.cse7 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse24)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25))) (let ((.cse13 (= .cse4 4)) (.cse17 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse7 .cse24))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22)) (.cse19 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse11 .cse23))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22)) (.cse10 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse23 .cse11))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22)) (.cse18 (= .cse11 4)) (.cse16 (= .cse7 4)) (.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse5 .cse7 .cse6 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22))) (let ((.cse8 (= .cse3 4)) (.cse1 (not .cse16)) (.cse12 (not .cse18)) (.cse14 (= .cse10 4)) (.cse20 (= .cse19 4)) (.cse15 (= 4 .cse17)) (.cse9 (not .cse13))) (and (or .cse1 (= .cse2 (+ (* .cse3 .cse4) (* .cse5 .cse3) (* .cse3 .cse6) (* .cse7 .cse3))) .cse8 .cse9) (or (= .cse2 (+ (* .cse5 .cse10 .cse4) (* .cse10 .cse11) (* .cse10 .cse4 .cse6))) .cse12 .cse13 .cse14) (or (not .cse15) .cse16 (= .cse2 (+ (* .cse5 .cse7) (* .cse7 .cse6) (* .cse7 .cse4) .cse17)) .cse9) (or .cse18 .cse13 (= .cse2 (+ (* .cse4 .cse6 .cse11 .cse19) (* .cse5 .cse4 .cse11 .cse19))) .cse20) (or (not .cse8) .cse1 (= .cse2 (+ .cse5 .cse3 .cse7 .cse6 .cse4)) .cse9) (or .cse12 (= (+ (* .cse5 .cse4) .cse11 (* .cse4 .cse6) .cse10) .cse2) .cse13 (not .cse14)) (or .cse18 (not .cse20) .cse13 (= (+ (* .cse4 .cse6 .cse11) .cse19 (* .cse5 .cse4 .cse11)) .cse2)) (or .cse16 .cse15 (= .cse2 (+ (* .cse5 .cse7 .cse17) (* .cse7 .cse17 .cse6) (* .cse7 .cse17 .cse4))) .cse9))))))))) (or .cse0 (let ((.cse40 (* .cse5 .cse6))) (let ((.cse32 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse40)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse27))) (let ((.cse47 (+ .cse40 .cse32)) (.cse46 (* .cse32 .cse40))) (let ((.cse37 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse46)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25)) (.cse31 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse47)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25))) (let ((.cse39 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse40 .cse31 .cse32))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22)) (.cse34 (= .cse32 4)) (.cse29 (= .cse31 4)) (.cse30 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse31 .cse47))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22)) (.cse38 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse37 .cse46))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22)) (.cse45 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse46 .cse37))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22)) (.cse36 (= .cse37 4))) (let ((.cse43 (not .cse36)) (.cse44 (= 4 .cse45)) (.cse35 (= .cse38 4)) (.cse28 (= .cse30 4)) (.cse41 (not .cse29)) (.cse33 (not .cse34)) (.cse42 (= .cse39 4))) (and (or (not .cse28) .cse29 (= .cse2 (+ .cse30 (* .cse5 .cse31 .cse6) (* .cse32 .cse31))) .cse33) (or .cse34 .cse35 .cse36 (= .cse2 (* .cse5 .cse37 .cse32 .cse38 .cse6))) (or (= .cse2 (+ .cse39 .cse40 .cse31 .cse32)) .cse41 (not .cse42) .cse33) (or .cse34 .cse43 (not .cse44) (= (+ .cse37 (* .cse5 .cse32 .cse6) .cse45) .cse2)) (or .cse34 (= (+ (* .cse37 .cse45) (* .cse5 .cse32 .cse6 .cse45)) .cse2) .cse43 .cse44) (or .cse34 (not .cse35) (= .cse2 (+ .cse38 (* .cse5 .cse37 .cse32 .cse6))) .cse36) (or .cse28 (= (+ (* .cse5 .cse31 .cse6 .cse30) (* .cse32 .cse31 .cse30)) .cse2) .cse29 .cse33) (or .cse41 .cse33 (= (+ (* .cse39 .cse32) (* .cse39 .cse31) (* .cse5 .cse39 .cse6)) .cse2) .cse42))))))))))))) is different from false [2021-11-21 01:44:03,753 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse48 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse21 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse48)))) (let ((.cse0 (= .cse5 4)) (.cse2 (* 4 c_~N~0)) (.cse22 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 12 .cse48)) (.cse25 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8 .cse48)) (.cse27 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse48 4)) (.cse6 (select .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (and (or (not .cse0) (let ((.cse26 (+ .cse5 .cse6))) (let ((.cse4 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse26)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse27))) (let ((.cse24 (+ .cse5 .cse6 .cse4)) (.cse23 (* .cse4 .cse26))) (let ((.cse11 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse23)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25)) (.cse7 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse24)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25))) (let ((.cse13 (= .cse4 4)) (.cse17 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse7 .cse24))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22)) (.cse19 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse11 .cse23))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22)) (.cse10 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse23 .cse11))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22)) (.cse18 (= .cse11 4)) (.cse16 (= .cse7 4)) (.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse5 .cse7 .cse6 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22))) (let ((.cse8 (= .cse3 4)) (.cse1 (not .cse16)) (.cse12 (not .cse18)) (.cse14 (= .cse10 4)) (.cse20 (= .cse19 4)) (.cse15 (= 4 .cse17)) (.cse9 (not .cse13))) (and (or .cse1 (= .cse2 (+ (* .cse3 .cse4) (* .cse5 .cse3) (* .cse3 .cse6) (* .cse7 .cse3))) .cse8 .cse9) (or (= .cse2 (+ (* .cse5 .cse10 .cse4) (* .cse10 .cse11) (* .cse10 .cse4 .cse6))) .cse12 .cse13 .cse14) (or (not .cse15) .cse16 (= .cse2 (+ (* .cse5 .cse7) (* .cse7 .cse6) (* .cse7 .cse4) .cse17)) .cse9) (or .cse18 .cse13 (= .cse2 (+ (* .cse4 .cse6 .cse11 .cse19) (* .cse5 .cse4 .cse11 .cse19))) .cse20) (or (not .cse8) .cse1 (= .cse2 (+ .cse5 .cse3 .cse7 .cse6 .cse4)) .cse9) (or .cse12 (= (+ (* .cse5 .cse4) .cse11 (* .cse4 .cse6) .cse10) .cse2) .cse13 (not .cse14)) (or .cse18 (not .cse20) .cse13 (= (+ (* .cse4 .cse6 .cse11) .cse19 (* .cse5 .cse4 .cse11)) .cse2)) (or .cse16 .cse15 (= .cse2 (+ (* .cse5 .cse7 .cse17) (* .cse7 .cse17 .cse6) (* .cse7 .cse17 .cse4))) .cse9))))))))) (or .cse0 (let ((.cse40 (* .cse5 .cse6))) (let ((.cse32 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse40)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse27))) (let ((.cse47 (+ .cse40 .cse32)) (.cse46 (* .cse32 .cse40))) (let ((.cse37 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse46)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25)) (.cse31 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse47)) |c_ULTIMATE.start_main_~a~0#1.base|) .cse25))) (let ((.cse39 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse40 .cse31 .cse32))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22)) (.cse34 (= .cse32 4)) (.cse29 (= .cse31 4)) (.cse30 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse31 .cse47))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22)) (.cse38 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (* .cse37 .cse46))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22)) (.cse45 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse21 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse46 .cse37))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse22)) (.cse36 (= .cse37 4))) (let ((.cse43 (not .cse36)) (.cse44 (= 4 .cse45)) (.cse35 (= .cse38 4)) (.cse28 (= .cse30 4)) (.cse41 (not .cse29)) (.cse33 (not .cse34)) (.cse42 (= .cse39 4))) (and (or (not .cse28) .cse29 (= .cse2 (+ .cse30 (* .cse5 .cse31 .cse6) (* .cse32 .cse31))) .cse33) (or .cse34 .cse35 .cse36 (= .cse2 (* .cse5 .cse37 .cse32 .cse38 .cse6))) (or (= .cse2 (+ .cse39 .cse40 .cse31 .cse32)) .cse41 (not .cse42) .cse33) (or .cse34 .cse43 (not .cse44) (= (+ .cse37 (* .cse5 .cse32 .cse6) .cse45) .cse2)) (or .cse34 (= (+ (* .cse37 .cse45) (* .cse5 .cse32 .cse6 .cse45)) .cse2) .cse43 .cse44) (or .cse34 (not .cse35) (= .cse2 (+ .cse38 (* .cse5 .cse37 .cse32 .cse6))) .cse36) (or .cse28 (= (+ (* .cse5 .cse31 .cse6 .cse30) (* .cse32 .cse31 .cse30)) .cse2) .cse29 .cse33) (or .cse41 .cse33 (= (+ (* .cse39 .cse32) (* .cse39 .cse31) (* .cse5 .cse39 .cse6)) .cse2) .cse42))))))))))))) is different from true [2021-11-21 01:49:26,532 WARN L227 SmtUtils]: Spent 4.14m on a formula simplification that was a NOOP. DAG size: 204 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)