./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/modp.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_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/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_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/modp.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/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_68968407-0dd9-4454-b73a-65839f53d9cd/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 817f5f6ccae9ad487c2c79b7cbb3a82d69086f4c5d9b5c90d8a560b10cc6dfa3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:07:57,810 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:07:57,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:07:57,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:07:57,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:07:57,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:07:57,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:07:57,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:07:57,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:07:57,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:07:57,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:07:57,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:07:57,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:07:57,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:07:57,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:07:57,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:07:57,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:07:57,914 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:07:57,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:07:57,920 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:07:57,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:07:57,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:07:57,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:07:57,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:07:57,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:07:57,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:07:57,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:07:57,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:07:57,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:07:57,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:07:57,939 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:07:57,940 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:07:57,942 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:07:57,943 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:07:57,945 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:07:57,945 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:07:57,947 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:07:57,947 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:07:57,948 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:07:57,949 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:07:57,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:07:57,952 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-21 00:07:57,984 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:07:57,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:07:57,985 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:07:57,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:07:57,986 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:07:57,987 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:07:57,987 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:07:57,987 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:07:57,988 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:07:57,988 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:07:57,988 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:07:57,989 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:07:57,989 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:07:57,997 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:07:57,997 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:07:57,998 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:07:57,998 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:07:57,998 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:07:57,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:07:57,999 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-21 00:07:58,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:07:58,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-21 00:07:58,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:07:58,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:07:58,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:07:58,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:07:58,001 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-21 00:07:58,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:07:58,002 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:07:58,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:07:58,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:07:58,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:07:58,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:07:58,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:07:58,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:07:58,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:07:58,004 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:07:58,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:07:58,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:07:58,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:07:58,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:07:58,009 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_68968407-0dd9-4454-b73a-65839f53d9cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 817f5f6ccae9ad487c2c79b7cbb3a82d69086f4c5d9b5c90d8a560b10cc6dfa3 [2021-11-21 00:07:58,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:07:58,409 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:07:58,412 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:07:58,414 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:07:58,415 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:07:58,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/array-fpi/modp.c [2021-11-21 00:07:58,498 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/data/5ca6bd110/08b7d0ebf81d4b539c31fe27fb34fda9/FLAG8d59799c0 [2021-11-21 00:07:59,026 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:07:59,027 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/sv-benchmarks/c/array-fpi/modp.c [2021-11-21 00:07:59,038 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/data/5ca6bd110/08b7d0ebf81d4b539c31fe27fb34fda9/FLAG8d59799c0 [2021-11-21 00:07:59,373 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/data/5ca6bd110/08b7d0ebf81d4b539c31fe27fb34fda9 [2021-11-21 00:07:59,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:07:59,376 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:07:59,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:07:59,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:07:59,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:07:59,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:07:59" (1/1) ... [2021-11-21 00:07:59,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9d66cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:07:59, skipping insertion in model container [2021-11-21 00:07:59,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:07:59" (1/1) ... [2021-11-21 00:07:59,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:07:59,427 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:07:59,642 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_68968407-0dd9-4454-b73a-65839f53d9cd/sv-benchmarks/c/array-fpi/modp.c[587,600] [2021-11-21 00:07:59,676 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:07:59,688 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:07:59,708 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_68968407-0dd9-4454-b73a-65839f53d9cd/sv-benchmarks/c/array-fpi/modp.c[587,600] [2021-11-21 00:07:59,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:07:59,755 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:07:59,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:07:59 WrapperNode [2021-11-21 00:07:59,756 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:07:59,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:07:59,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:07:59,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:07:59,767 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:07:59" (1/1) ... [2021-11-21 00:07:59,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:07:59" (1/1) ... [2021-11-21 00:07:59,817 INFO L137 Inliner]: procedures = 17, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 78 [2021-11-21 00:07:59,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:07:59,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:07:59,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:07:59,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:07:59,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:07:59" (1/1) ... [2021-11-21 00:07:59,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:07:59" (1/1) ... [2021-11-21 00:07:59,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:07:59" (1/1) ... [2021-11-21 00:07:59,834 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:07:59" (1/1) ... [2021-11-21 00:07:59,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:07:59" (1/1) ... [2021-11-21 00:07:59,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:07:59" (1/1) ... [2021-11-21 00:07:59,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:07:59" (1/1) ... [2021-11-21 00:07:59,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:07:59,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:07:59,853 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:07:59,853 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:07:59,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:07:59" (1/1) ... [2021-11-21 00:07:59,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:07:59,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:07:59,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:07:59,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:07:59,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:07:59,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:07:59,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:07:59,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:07:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:07:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:07:59,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:07:59,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:07:59,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:08:00,042 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:08:00,044 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:08:00,216 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:08:00,254 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:08:00,255 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-21 00:08:00,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:08:00 BoogieIcfgContainer [2021-11-21 00:08:00,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:08:00,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:08:00,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:08:00,264 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:08:00,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:07:59" (1/3) ... [2021-11-21 00:08:00,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1149bafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:08:00, skipping insertion in model container [2021-11-21 00:08:00,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:07:59" (2/3) ... [2021-11-21 00:08:00,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1149bafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:08:00, skipping insertion in model container [2021-11-21 00:08:00,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:08:00" (3/3) ... [2021-11-21 00:08:00,269 INFO L111 eAbstractionObserver]: Analyzing ICFG modp.c [2021-11-21 00:08:00,275 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:08:00,275 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:08:00,357 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:08:00,373 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 00:08:00,373 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:08:00,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 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 00:08:00,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-21 00:08:00,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:00,426 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:08:00,427 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:08:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:00,436 INFO L85 PathProgramCache]: Analyzing trace with hash 90967917, now seen corresponding path program 1 times [2021-11-21 00:08:00,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:00,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332167026] [2021-11-21 00:08:00,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:00,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:00,808 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 00:08:00,809 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:00,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332167026] [2021-11-21 00:08:00,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332167026] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:08:00,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:08:00,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:08:00,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323312315] [2021-11-21 00:08:00,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:08:00,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:08:00,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:00,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:08:00,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:08:00,855 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:08:00,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:00,928 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2021-11-21 00:08:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:08:00,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-21 00:08:00,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:00,949 INFO L225 Difference]: With dead ends: 20 [2021-11-21 00:08:00,951 INFO L226 Difference]: Without dead ends: 10 [2021-11-21 00:08:00,955 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 00:08:00,960 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:00,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-21 00:08:00,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-21 00:08:00,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-21 00:08:00,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:08:00,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-11-21 00:08:01,000 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2021-11-21 00:08:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:01,001 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-11-21 00:08:01,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:08:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-11-21 00:08:01,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-21 00:08:01,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:01,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:08:01,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:08:01,003 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:08:01,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:01,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1733550639, now seen corresponding path program 1 times [2021-11-21 00:08:01,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:01,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864581809] [2021-11-21 00:08:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:01,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:01,047 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:08:01,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681890735] [2021-11-21 00:08:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:01,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:08:01,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:08:01,050 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:08:01,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:08:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:01,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:08:01,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:08:01,229 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 00:08:01,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:08:01,230 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:01,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864581809] [2021-11-21 00:08:01,231 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:08:01,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681890735] [2021-11-21 00:08:01,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681890735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:08:01,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:08:01,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:08:01,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728801566] [2021-11-21 00:08:01,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:08:01,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:08:01,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:01,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:08:01,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:08:01,236 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 00:08:01,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:08:01,272 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-11-21 00:08:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:08:01,273 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 00:08:01,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:08:01,274 INFO L225 Difference]: With dead ends: 21 [2021-11-21 00:08:01,274 INFO L226 Difference]: Without dead ends: 16 [2021-11-21 00:08:01,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 00:08:01,283 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:08:01,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 6 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-21 00:08:01,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-21 00:08:01,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 11. [2021-11-21 00:08:01,289 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 00:08:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-11-21 00:08:01,290 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-11-21 00:08:01,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:08:01,291 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-11-21 00:08:01,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 00:08:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-11-21 00:08:01,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-21 00:08:01,292 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:08:01,292 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:08:01,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:08:01,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:08:01,510 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:08:01,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:08:01,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2086190460, now seen corresponding path program 1 times [2021-11-21 00:08:01,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:08:01,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048256121] [2021-11-21 00:08:01,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:01,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:08:01,545 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:08:01,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140575600] [2021-11-21 00:08:01,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:08:01,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:08:01,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:08:01,555 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:08:01,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:08:01,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:08:01,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 00:08:01,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:08:01,690 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 00:08:01,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:08:01,974 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:08:01,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-21 00:08:02,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 228 treesize of output 220 [2021-11-21 00:08:03,064 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 00:08:03,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:08:47,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:08:47,706 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:08:47,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048256121] [2021-11-21 00:08:47,706 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:08:47,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140575600] [2021-11-21 00:08:47,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140575600] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:08:47,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1576859891] [2021-11-21 00:08:47,751 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:08:47,751 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:08:47,757 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:08:47,764 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:08:47,765 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:08:48,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:48,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:48,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:48,551 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:08:48,552 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 00:08:48,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:48,786 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 00:08:49,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:49,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:49,052 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 00:08:49,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:49,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:49,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2021-11-21 00:08:50,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:50,393 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 00:08:50,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 375 treesize of output 350 [2021-11-21 00:08:51,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:08:52,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:52,147 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:08:52,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-21 00:08:52,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:08:52,568 INFO L354 Elim1Store]: treesize reduction 54, result has 34.9 percent of original size [2021-11-21 00:08:52,569 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 3 case distinctions, treesize of input 43 treesize of output 55 [2021-11-21 00:08:52,998 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:08:52,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:08:54,583 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:08:56,193 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:08:56,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:08:56,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-21 00:08:56,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977734086] [2021-11-21 00:08:56,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:08:56,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-21 00:08:56,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:08:56,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-21 00:08:56,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=227, Unknown=16, NotChecked=0, Total=306 [2021-11-21 00:08:56,198 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 13 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 00:09:58,132 WARN L227 SmtUtils]: Spent 14.52s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:10:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:20,415 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-11-21 00:10:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:10:20,416 INFO L78 Accepts]: Start accepts. Automaton has has 13 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) Word has length 9 [2021-11-21 00:10:20,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:20,418 INFO L225 Difference]: With dead ends: 28 [2021-11-21 00:10:20,419 INFO L226 Difference]: Without dead ends: 26 [2021-11-21 00:10:20,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 129.8s TimeCoverageRelationStatistics Valid=118, Invalid=396, Unknown=38, NotChecked=0, Total=552 [2021-11-21 00:10:20,422 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:20,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 40 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 73 Unchecked, 0.3s Time] [2021-11-21 00:10:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-21 00:10:20,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 17. [2021-11-21 00:10:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 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 00:10:20,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2021-11-21 00:10:20,431 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2021-11-21 00:10:20,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:20,432 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2021-11-21 00:10:20,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 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 00:10:20,433 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2021-11-21 00:10:20,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-21 00:10:20,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:20,434 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:20,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:10:20,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:10:20,644 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:10:20,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:20,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1070514912, now seen corresponding path program 2 times [2021-11-21 00:10:20,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:10:20,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998411279] [2021-11-21 00:10:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:20,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:10:20,684 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:10:20,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1749072785] [2021-11-21 00:10:20,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:10:20,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:10:20,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:10:20,702 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:10:20,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:10:20,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-21 00:10:20,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:10:20,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:10:20,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:20,974 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 00:10:20,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:21,110 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 00:10:21,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:10:21,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998411279] [2021-11-21 00:10:21,111 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:10:21,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749072785] [2021-11-21 00:10:21,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749072785] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:21,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [221934423] [2021-11-21 00:10:21,114 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:10:21,114 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:10:21,115 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:10:21,115 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:10:21,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:10:21,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:21,450 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 00:10:21,450 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 00:10:21,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:21,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:22,023 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-21 00:10:22,024 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 00:10:22,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:22,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:22,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:22,602 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:10:22,602 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 00:10:22,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:10:23,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:10:23,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:10:23,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:23,745 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:10:23,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:10:23,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:24,015 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 00:10:24,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 43 [2021-11-21 00:10:24,375 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:10:24,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:10:25,869 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:10:26,958 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:10:26,959 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:10:26,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-21 00:10:26,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026135722] [2021-11-21 00:10:26,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:10:26,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-21 00:10:26,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:10:26,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-21 00:10:26,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:10:26,961 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) 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 00:10:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:10:27,476 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-11-21 00:10:27,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:10:27,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) 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) Word has length 10 [2021-11-21 00:10:27,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:10:27,477 INFO L225 Difference]: With dead ends: 37 [2021-11-21 00:10:27,478 INFO L226 Difference]: Without dead ends: 32 [2021-11-21 00:10:27,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:10:27,480 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:10:27,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 25 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-21 00:10:27,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-21 00:10:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 18. [2021-11-21 00:10:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:10:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-11-21 00:10:27,488 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2021-11-21 00:10:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:10:27,488 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-11-21 00:10:27,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) 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 00:10:27,489 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-11-21 00:10:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:10:27,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:10:27,490 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:10:27,515 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-21 00:10:27,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:10:27,694 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:10:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:10:27,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1182090675, now seen corresponding path program 3 times [2021-11-21 00:10:27,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:10:27,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074789192] [2021-11-21 00:10:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:10:27,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:10:27,738 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:10:27,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1098925247] [2021-11-21 00:10:27,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:10:27,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:10:27,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:10:27,743 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:10:27,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-21 00:10:27,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:10:27,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:10:27,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-21 00:10:27,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:10:27,869 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 00:10:27,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:10:28,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:10:28,440 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:10:28,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-21 00:10:28,712 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-21 00:10:28,712 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 3 case distinctions, treesize of input 41 treesize of output 35 [2021-11-21 00:10:29,426 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-21 00:10:29,427 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 223 treesize of output 157 [2021-11-21 00:10:29,594 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 00:10:29,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:10:41,407 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:10:41,408 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 1 [2021-11-21 00:10:41,416 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 00:10:41,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:10:41,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074789192] [2021-11-21 00:10:41,417 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:10:41,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098925247] [2021-11-21 00:10:41,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098925247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:10:41,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1090265308] [2021-11-21 00:10:41,421 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:10:41,421 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:10:41,421 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:10:41,422 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:10:41,422 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:10:41,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:41,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:41,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:41,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:42,017 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:10:42,018 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 00:10:42,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:42,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:42,194 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 00:10:42,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:42,289 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 00:10:42,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:42,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:42,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2021-11-21 00:10:43,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:43,320 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 00:10:43,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 372 treesize of output 347 [2021-11-21 00:10:44,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:10:44,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:10:44,834 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:10:44,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:10:45,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:10:45,137 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 00:10:45,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 43 [2021-11-21 00:10:45,354 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:10:45,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:10:46,677 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:10:48,321 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:10:48,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:10:48,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-21 00:10:48,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068976179] [2021-11-21 00:10:48,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:10:48,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-21 00:10:48,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:10:48,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-21 00:10:48,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=410, Unknown=5, NotChecked=0, Total=506 [2021-11-21 00:10:48,324 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:05,036 WARN L227 SmtUtils]: Spent 14.18s on a formula simplification. DAG size of input: 42 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:11:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:06,132 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-11-21 00:11:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:11:06,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 00:11:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:06,135 INFO L225 Difference]: With dead ends: 40 [2021-11-21 00:11:06,135 INFO L226 Difference]: Without dead ends: 38 [2021-11-21 00:11:06,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=141, Invalid=723, Unknown=6, NotChecked=0, Total=870 [2021-11-21 00:11:06,137 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:06,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 47 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 80 Invalid, 0 Unknown, 100 Unchecked, 0.5s Time] [2021-11-21 00:11:06,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-21 00:11:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 22. [2021-11-21 00:11:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2021-11-21 00:11:06,146 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 11 [2021-11-21 00:11:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:06,147 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2021-11-21 00:11:06,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2021-11-21 00:11:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-21 00:11:06,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:06,148 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:06,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-21 00:11:06,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:06,364 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:11:06,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:06,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1186761700, now seen corresponding path program 4 times [2021-11-21 00:11:06,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:11:06,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761280580] [2021-11-21 00:11:06,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:06,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:11:06,378 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:11:06,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568976791] [2021-11-21 00:11:06,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:11:06,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:06,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:11:06,385 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:11:06,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-21 00:11:06,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:06,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-21 00:11:06,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:11:06,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:06,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-21 00:11:06,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:11:06,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761280580] [2021-11-21 00:11:06,727 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:11:06,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568976791] [2021-11-21 00:11:06,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568976791] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:06,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [926022420] [2021-11-21 00:11:06,730 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:11:06,730 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:11:06,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:11:06,731 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:11:06,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:11:07,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:07,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:07,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:07,310 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:11:07,311 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 00:11:07,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:07,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:07,499 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 00:11:07,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:07,582 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 00:11:07,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:07,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:07,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2021-11-21 00:11:08,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:08,809 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 00:11:08,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 372 treesize of output 347 [2021-11-21 00:11:09,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:11:10,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:10,328 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:11:10,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-21 00:11:10,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:10,683 INFO L354 Elim1Store]: treesize reduction 54, result has 34.9 percent of original size [2021-11-21 00:11:10,684 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 3 case distinctions, treesize of input 43 treesize of output 55 [2021-11-21 00:11:11,030 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:11:11,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:11:12,569 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:11:13,702 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:11:13,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:11:13,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-11-21 00:11:13,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973241503] [2021-11-21 00:11:13,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:11:13,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:11:13,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:11:13,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:11:13,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:11:13,704 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 00:11:13,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:13,962 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2021-11-21 00:11:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-21 00:11:13,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-21 00:11:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:13,963 INFO L225 Difference]: With dead ends: 45 [2021-11-21 00:11:13,964 INFO L226 Difference]: Without dead ends: 30 [2021-11-21 00:11:13,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-21 00:11:13,965 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:13,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 15 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:11:13,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-21 00:11:13,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2021-11-21 00:11:13,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:13,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-11-21 00:11:13,973 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2021-11-21 00:11:13,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:13,974 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-11-21 00:11:13,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 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 00:11:13,974 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-11-21 00:11:13,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-21 00:11:13,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:13,975 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:14,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-21 00:11:14,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:14,188 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:11:14,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:14,189 INFO L85 PathProgramCache]: Analyzing trace with hash 2001580160, now seen corresponding path program 5 times [2021-11-21 00:11:14,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:11:14,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022308113] [2021-11-21 00:11:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:14,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:11:14,207 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:11:14,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873958308] [2021-11-21 00:11:14,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:11:14,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:14,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:11:14,214 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:11:14,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-21 00:11:14,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:11:14,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:11:14,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-21 00:11:14,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:14,561 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 00:11:14,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:14,778 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 00:11:14,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:11:14,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022308113] [2021-11-21 00:11:14,778 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:11:14,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873958308] [2021-11-21 00:11:14,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873958308] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:14,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [384104134] [2021-11-21 00:11:14,781 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:11:14,781 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:11:14,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:11:14,781 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:11:14,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:11:15,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:15,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:15,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:15,299 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:11:15,300 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 00:11:15,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:15,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:15,555 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 00:11:15,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:15,636 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 00:11:16,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:16,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:16,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2021-11-21 00:11:16,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:16,663 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 00:11:16,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 372 treesize of output 347 [2021-11-21 00:11:17,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:11:18,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:18,076 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:11:18,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:11:18,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:18,344 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 00:11:18,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 43 [2021-11-21 00:11:18,693 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:11:18,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:11:19,873 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:11:21,026 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:11:21,027 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:11:21,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-21 00:11:21,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289109928] [2021-11-21 00:11:21,027 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:11:21,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:11:21,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:11:21,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:11:21,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-11-21 00:11:21,029 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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 00:11:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:21,441 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2021-11-21 00:11:21,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:11:21,442 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) Word has length 12 [2021-11-21 00:11:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:21,443 INFO L225 Difference]: With dead ends: 56 [2021-11-21 00:11:21,444 INFO L226 Difference]: Without dead ends: 48 [2021-11-21 00:11:21,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-11-21 00:11:21,446 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:21,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 30 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-21 00:11:21,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-21 00:11:21,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2021-11-21 00:11:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-21 00:11:21,457 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 12 [2021-11-21 00:11:21,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:21,457 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-21 00:11:21,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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 00:11:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-21 00:11:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:11:21,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:21,459 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:21,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-21 00:11:21,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:21,660 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:11:21,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:21,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2060601037, now seen corresponding path program 6 times [2021-11-21 00:11:21,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:11:21,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80617196] [2021-11-21 00:11:21,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:21,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:11:21,678 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:11:21,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745288687] [2021-11-21 00:11:21,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:11:21,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:21,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:11:21,687 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:11:21,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-21 00:11:21,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:11:21,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:11:21,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-21 00:11:21,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:11:22,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:11:22,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:11:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80617196] [2021-11-21 00:11:22,369 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:11:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745288687] [2021-11-21 00:11:22,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745288687] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:22,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [58251662] [2021-11-21 00:11:22,371 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:11:22,371 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:11:22,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:11:22,372 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:11:22,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:11:22,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:22,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:22,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:22,901 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:11:22,902 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 00:11:23,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:23,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:23,102 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 00:11:23,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:23,196 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 00:11:23,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:23,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:23,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2021-11-21 00:11:24,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:24,182 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 00:11:24,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 375 treesize of output 350 [2021-11-21 00:11:25,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:11:25,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:11:25,712 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:11:25,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:11:26,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:26,078 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 00:11:26,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 43 [2021-11-21 00:11:26,227 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:11:26,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:11:27,505 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:11:28,663 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:11:28,663 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:11:28,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-11-21 00:11:28,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821114558] [2021-11-21 00:11:28,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:11:28,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-21 00:11:28,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:11:28,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-21 00:11:28,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-11-21 00:11:28,664 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:11:29,938 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2021-11-21 00:11:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-21 00:11:29,939 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-21 00:11:29,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:11:29,940 INFO L225 Difference]: With dead ends: 75 [2021-11-21 00:11:29,940 INFO L226 Difference]: Without dead ends: 63 [2021-11-21 00:11:29,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2021-11-21 00:11:29,942 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 68 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:11:29,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 115 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-21 00:11:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-21 00:11:29,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 25. [2021-11-21 00:11:29,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:29,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-11-21 00:11:29,952 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 13 [2021-11-21 00:11:29,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:11:29,952 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-11-21 00:11:29,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:11:29,953 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-11-21 00:11:29,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-21 00:11:29,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:11:29,954 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:11:29,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-21 00:11:30,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:30,161 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:11:30,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:11:30,162 INFO L85 PathProgramCache]: Analyzing trace with hash 2055930012, now seen corresponding path program 7 times [2021-11-21 00:11:30,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:11:30,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895855674] [2021-11-21 00:11:30,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:11:30,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:11:30,179 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:11:30,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1099256252] [2021-11-21 00:11:30,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:11:30,180 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:11:30,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:11:30,181 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:11:30,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-21 00:11:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:11:30,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-21 00:11:30,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:11:30,284 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 00:11:30,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:11:30,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:11:30,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:11:30,829 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:11:30,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-21 00:11:31,053 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-21 00:11:31,054 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 3 case distinctions, treesize of input 46 treesize of output 40 [2021-11-21 00:11:31,353 INFO L354 Elim1Store]: treesize reduction 132, result has 16.5 percent of original size [2021-11-21 00:11:31,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 54 [2021-11-21 00:11:34,054 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-21 00:11:34,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 360 treesize of output 234 [2021-11-21 00:11:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:11:34,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:11:59,628 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:11:59,628 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 1 [2021-11-21 00:11:59,637 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 00:11:59,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:11:59,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895855674] [2021-11-21 00:11:59,638 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:11:59,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099256252] [2021-11-21 00:11:59,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099256252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:11:59,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [935154693] [2021-11-21 00:11:59,640 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:11:59,641 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:11:59,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:11:59,641 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:11:59,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:11:59,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:11:59,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:00,292 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-21 00:12:00,292 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 00:12:00,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:00,600 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 00:12:00,600 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 00:12:00,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:00,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:00,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:01,123 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:12:01,124 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 00:12:01,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:12:01,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:12:01,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:12:02,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:02,203 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:12:02,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-21 00:12:02,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:02,612 INFO L354 Elim1Store]: treesize reduction 54, result has 34.9 percent of original size [2021-11-21 00:12:02,613 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 3 case distinctions, treesize of input 43 treesize of output 55 [2021-11-21 00:12:02,899 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:12:02,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:12:04,294 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:12:06,144 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:12:06,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:12:06,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-21 00:12:06,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895219829] [2021-11-21 00:12:06,153 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:12:06,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-21 00:12:06,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:12:06,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-21 00:12:06,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=570, Unknown=12, NotChecked=0, Total=702 [2021-11-21 00:12:06,156 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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 00:12:17,518 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 45 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:12:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:25,335 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-11-21 00:12:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-21 00:12:25,336 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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 00:12:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:25,337 INFO L225 Difference]: With dead ends: 46 [2021-11-21 00:12:25,337 INFO L226 Difference]: Without dead ends: 44 [2021-11-21 00:12:25,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=206, Invalid=1110, Unknown=16, NotChecked=0, Total=1332 [2021-11-21 00:12:25,339 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:25,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 66 Invalid, 0 Unknown, 90 Unchecked, 0.4s Time] [2021-11-21 00:12:25,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-21 00:12:25,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2021-11-21 00:12:25,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:12:25,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-11-21 00:12:25,351 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 13 [2021-11-21 00:12:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:25,352 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-11-21 00:12:25,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 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 00:12:25,352 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-11-21 00:12:25,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-21 00:12:25,353 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:25,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:25,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-21 00:12:25,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-21 00:12:25,570 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:12:25,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:25,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1221265221, now seen corresponding path program 1 times [2021-11-21 00:12:25,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:12:25,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040708665] [2021-11-21 00:12:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:25,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:12:25,587 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:12:25,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831002539] [2021-11-21 00:12:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:25,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:25,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:12:25,589 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:12:25,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-21 00:12:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:12:25,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 00:12:25,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:25,656 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 00:12:25,669 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 00:12:25,730 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 25 treesize of output 13 [2021-11-21 00:12:25,793 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 25 treesize of output 13 [2021-11-21 00:12:25,954 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 28 treesize of output 23 [2021-11-21 00:12:26,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:26,107 INFO L354 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2021-11-21 00:12:26,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 34 [2021-11-21 00:12:28,254 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:12:28,255 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 332 treesize of output 256 [2021-11-21 00:12:28,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:28,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:12:32,318 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0)))) is different from false [2021-11-21 00:12:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2021-11-21 00:12:32,563 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:12:32,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040708665] [2021-11-21 00:12:32,563 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:12:32,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831002539] [2021-11-21 00:12:32,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831002539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:12:32,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1730516385] [2021-11-21 00:12:32,565 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:12:32,565 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:12:32,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:12:32,566 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:12:32,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:12:32,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:32,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:33,130 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-21 00:12:33,130 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 00:12:33,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:33,409 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 00:12:33,410 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 00:12:33,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:33,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:33,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:33,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:33,914 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:12:33,914 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 00:12:34,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:12:34,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:12:34,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:12:35,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:12:35,043 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:12:35,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:12:35,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:12:35,271 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 00:12:35,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 43 [2021-11-21 00:12:35,602 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:12:35,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:12:41,181 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:12:43,294 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:12:43,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:12:43,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-11-21 00:12:43,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233371060] [2021-11-21 00:12:43,294 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:12:43,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:12:43,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:12:43,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:12:43,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=473, Unknown=1, NotChecked=44, Total=600 [2021-11-21 00:12:43,297 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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 00:12:45,485 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) 2) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|)) (not (= |ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 2) (forall ((~N~0 Int)) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (not (= (mod (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0)))))) is different from false [2021-11-21 00:12:45,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:12:45,503 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-11-21 00:12:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-21 00:12:45,504 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-21 00:12:45,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:12:45,504 INFO L225 Difference]: With dead ends: 33 [2021-11-21 00:12:45,504 INFO L226 Difference]: Without dead ends: 23 [2021-11-21 00:12:45,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=84, Invalid=474, Unknown=2, NotChecked=90, Total=650 [2021-11-21 00:12:45,509 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:12:45,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2021-11-21 00:12:45,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-21 00:12:45,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-21 00:12:45,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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 00:12:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-21 00:12:45,517 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2021-11-21 00:12:45,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:12:45,517 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-21 00:12:45,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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 00:12:45,517 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-21 00:12:45,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-21 00:12:45,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:12:45,518 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:12:45,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-21 00:12:45,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:45,722 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:12:45,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:12:45,722 INFO L85 PathProgramCache]: Analyzing trace with hash -8393427, now seen corresponding path program 8 times [2021-11-21 00:12:45,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:12:45,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440922952] [2021-11-21 00:12:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:12:45,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:12:45,736 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:12:45,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117021235] [2021-11-21 00:12:45,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:12:45,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:12:45,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:12:45,738 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:12:45,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-21 00:12:45,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:12:45,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:12:45,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-21 00:12:45,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:12:45,854 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 00:12:45,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:12:46,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:12:46,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:12:46,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:12:46,520 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:12:46,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-21 00:12:46,730 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-21 00:12:46,731 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 3 case distinctions, treesize of input 42 treesize of output 40 [2021-11-21 00:12:47,038 INFO L354 Elim1Store]: treesize reduction 132, result has 16.5 percent of original size [2021-11-21 00:12:47,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 54 [2021-11-21 00:12:49,474 INFO L354 Elim1Store]: treesize reduction 212, result has 14.9 percent of original size [2021-11-21 00:12:49,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 73 [2021-11-21 00:12:59,717 INFO L354 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2021-11-21 00:12:59,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 262 treesize of output 176 [2021-11-21 00:12:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:12:59,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:13:40,943 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:13:40,944 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 447 treesize of output 1 [2021-11-21 00:13:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:13:40,950 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:13:40,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440922952] [2021-11-21 00:13:40,950 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:13:40,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117021235] [2021-11-21 00:13:40,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117021235] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:13:40,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1546521861] [2021-11-21 00:13:40,952 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:13:40,953 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:13:40,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:13:40,953 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:13:40,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:13:41,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:41,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:41,456 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-21 00:13:41,456 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 00:13:41,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:41,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:41,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:41,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:41,904 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:13:41,904 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 00:13:42,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:42,062 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 00:13:42,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:42,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:13:42,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2021-11-21 00:13:42,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:13:43,070 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 00:13:43,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 379 treesize of output 354 [2021-11-21 00:13:44,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:13:44,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:13:44,554 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:13:44,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-21 00:13:44,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:13:44,976 INFO L354 Elim1Store]: treesize reduction 54, result has 34.9 percent of original size [2021-11-21 00:13:44,977 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 3 case distinctions, treesize of input 43 treesize of output 55 [2021-11-21 00:13:45,433 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:13:45,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:13:46,560 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:13:48,650 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:13:48,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:13:48,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-11-21 00:13:48,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587808164] [2021-11-21 00:13:48,651 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:13:48,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-21 00:13:48,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:13:48,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-21 00:13:48,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=757, Unknown=19, NotChecked=0, Total=930 [2021-11-21 00:13:48,653 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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 00:14:05,640 WARN L227 SmtUtils]: Spent 7.30s on a formula simplification. DAG size of input: 49 DAG size of output: 49 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:14:05,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:05,865 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-11-21 00:14:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-21 00:14:05,866 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-21 00:14:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:05,867 INFO L225 Difference]: With dead ends: 48 [2021-11-21 00:14:05,867 INFO L226 Difference]: Without dead ends: 46 [2021-11-21 00:14:05,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 68.6s TimeCoverageRelationStatistics Valid=230, Invalid=1155, Unknown=21, NotChecked=0, Total=1406 [2021-11-21 00:14:05,868 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:05,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 31 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2021-11-21 00:14:05,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-21 00:14:05,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 33. [2021-11-21 00:14:05,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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 00:14:05,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-11-21 00:14:05,884 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 15 [2021-11-21 00:14:05,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:05,884 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-11-21 00:14:05,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 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 00:14:05,885 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-11-21 00:14:05,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-21 00:14:05,886 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:05,886 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:05,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-21 00:14:06,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:06,113 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:14:06,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:06,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1982520332, now seen corresponding path program 2 times [2021-11-21 00:14:06,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:06,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726651817] [2021-11-21 00:14:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:06,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:06,126 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:14:06,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441790417] [2021-11-21 00:14:06,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:14:06,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:06,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:06,127 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:14:06,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-21 00:14:06,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-21 00:14:06,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:14:06,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-21 00:14:06,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:06,222 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 00:14:06,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:14:06,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:14:06,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:14:06,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:06,874 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 23 treesize of output 18 [2021-11-21 00:14:07,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:07,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:07,006 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 30 [2021-11-21 00:14:07,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:07,287 INFO L354 Elim1Store]: treesize reduction 112, result has 17.6 percent of original size [2021-11-21 00:14:07,287 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 6 case distinctions, treesize of input 61 treesize of output 54 [2021-11-21 00:14:12,080 INFO L354 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2021-11-21 00:14:12,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 360 treesize of output 238 [2021-11-21 00:14:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:14:12,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:14:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 1 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-21 00:14:31,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:14:31,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726651817] [2021-11-21 00:14:31,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:14:31,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441790417] [2021-11-21 00:14:31,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441790417] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:14:31,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1380012884] [2021-11-21 00:14:31,994 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:14:31,995 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:14:31,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:14:31,995 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:14:31,996 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:14:32,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,468 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:14:32,469 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 00:14:32,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,604 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 00:14:32,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:32,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 12 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 00:14:33,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:33,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:14:33,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2021-11-21 00:14:33,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:33,740 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 00:14:33,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 372 treesize of output 347 [2021-11-21 00:14:34,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:14:35,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:35,316 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:14:35,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-21 00:14:35,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:14:35,591 INFO L354 Elim1Store]: treesize reduction 54, result has 34.9 percent of original size [2021-11-21 00:14:35,591 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 3 case distinctions, treesize of input 43 treesize of output 55 [2021-11-21 00:14:35,926 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:14:35,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:14:41,410 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:14:43,977 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:14:43,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:14:43,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2021-11-21 00:14:43,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573271593] [2021-11-21 00:14:43,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:14:43,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-21 00:14:43,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:14:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-21 00:14:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=640, Unknown=8, NotChecked=0, Total=756 [2021-11-21 00:14:43,980 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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 00:14:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:14:45,347 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2021-11-21 00:14:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-21 00:14:45,347 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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 16 [2021-11-21 00:14:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:14:45,348 INFO L225 Difference]: With dead ends: 44 [2021-11-21 00:14:45,348 INFO L226 Difference]: Without dead ends: 42 [2021-11-21 00:14:45,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=121, Invalid=741, Unknown=8, NotChecked=0, Total=870 [2021-11-21 00:14:45,350 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:14:45,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 29 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 69 Unchecked, 0.6s Time] [2021-11-21 00:14:45,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-21 00:14:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-11-21 00:14:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 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 00:14:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2021-11-21 00:14:45,379 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 16 [2021-11-21 00:14:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:14:45,380 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2021-11-21 00:14:45,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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 00:14:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2021-11-21 00:14:45,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-21 00:14:45,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:14:45,388 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:14:45,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-21 00:14:45,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-21 00:14:45,593 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:14:45,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:14:45,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1973337020, now seen corresponding path program 9 times [2021-11-21 00:14:45,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:14:45,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7564647] [2021-11-21 00:14:45,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:14:45,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:14:45,610 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:14:45,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775502971] [2021-11-21 00:14:45,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:14:45,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:14:45,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:14:45,612 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:14:45,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-21 00:14:45,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:14:45,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:14:45,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-21 00:14:45,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:14:45,762 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 00:14:45,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:14:45,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:14:46,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:14:46,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-21 00:14:46,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2021-11-21 00:14:46,697 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:14:46,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-11-21 00:14:46,915 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-21 00:14:46,915 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 3 case distinctions, treesize of input 42 treesize of output 40 [2021-11-21 00:14:47,242 INFO L354 Elim1Store]: treesize reduction 128, result has 16.9 percent of original size [2021-11-21 00:14:47,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 59 [2021-11-21 00:14:47,682 INFO L354 Elim1Store]: treesize reduction 208, result has 15.1 percent of original size [2021-11-21 00:14:47,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 78 [2021-11-21 00:14:48,324 INFO L354 Elim1Store]: treesize reduction 304, result has 13.6 percent of original size [2021-11-21 00:14:48,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 93 treesize of output 92 [2021-11-21 00:14:55,590 INFO L354 Elim1Store]: treesize reduction 176, result has 0.6 percent of original size [2021-11-21 00:14:55,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 184 [2021-11-21 00:14:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:14:55,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:15:08,126 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_278| Int) (|v_ULTIMATE.start_main_~i~0#1_277| Int) (|v_ULTIMATE.start_main_~i~0#1_276| Int)) (or (= (mod (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_278| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_277| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_276| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_278| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< |v_ULTIMATE.start_main_~i~0#1_276| (+ |v_ULTIMATE.start_main_~i~0#1_277| 1)) (< |v_ULTIMATE.start_main_~i~0#1_277| (+ |v_ULTIMATE.start_main_~i~0#1_278| 1)))) is different from false [2021-11-21 00:15:54,091 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:15:54,091 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 3964 treesize of output 1 [2021-11-21 00:15:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-21 00:15:54,096 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:15:54,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7564647] [2021-11-21 00:15:54,096 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:15:54,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775502971] [2021-11-21 00:15:54,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775502971] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:15:54,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1551709779] [2021-11-21 00:15:54,097 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:15:54,098 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:15:54,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:15:54,098 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:15:54,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:15:54,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:54,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:54,606 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-21 00:15:54,607 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 00:15:54,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:54,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:54,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:54,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:55,040 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:15:55,041 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 00:15:55,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:55,200 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 00:15:55,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:55,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:55,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2021-11-21 00:15:55,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:15:56,016 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 00:15:56,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 376 treesize of output 351 [2021-11-21 00:15:56,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:15:57,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:15:57,372 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:15:57,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:15:57,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:15:57,629 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 00:15:57,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 43 [2021-11-21 00:15:57,981 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:15:57,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:15:59,110 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:16:03,963 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:16:03,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:16:03,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-11-21 00:16:03,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534720608] [2021-11-21 00:16:03,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:16:03,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-21 00:16:03,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:16:03,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-21 00:16:03,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=915, Unknown=24, NotChecked=64, Total=1190 [2021-11-21 00:16:03,965 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand has 30 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 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 00:16:06,705 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse7 (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (.cse9 (+ 3 |c_ULTIMATE.start_main_~i~0#1|)) (.cse8 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (or (forall ((|v_ULTIMATE.start_main_~i~0#1_279| Int) (|v_ULTIMATE.start_main_~i~0#1_278| Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_277| Int) (|v_ULTIMATE.start_main_~i~0#1_276| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_278| (+ |v_ULTIMATE.start_main_~i~0#1_279| 1)) (< |v_ULTIMATE.start_main_~i~0#1_276| (+ |v_ULTIMATE.start_main_~i~0#1_277| 1)) (< |v_ULTIMATE.start_main_~i~0#1_277| (+ |v_ULTIMATE.start_main_~i~0#1_278| 1)) (= (mod (select (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse5 (+ 2 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse5)))) (let ((.cse0 (let ((.cse2 (let ((.cse3 (let ((.cse4 (store (select .cse1 |ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| .cse5))) (store .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_279| 4)) (select (select (store .cse1 |ULTIMATE.start_main_~a~0#1.base| .cse4) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_278| 4)) (select (select (store .cse1 |ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_277| 4)) (select (select (store .cse1 |ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_276| 4)) (select (select (store .cse1 |ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_279| 1))) (< .cse7 c_~N~0) (<= c_~N~0 .cse8)) (or (<= c_~N~0 .cse9) (forall ((|v_ULTIMATE.start_main_~i~0#1_279| Int) (|v_ULTIMATE.start_main_~i~0#1_278| Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_277| Int) (|v_ULTIMATE.start_main_~i~0#1_276| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_278| (+ |v_ULTIMATE.start_main_~i~0#1_279| 1)) (< |v_ULTIMATE.start_main_~i~0#1_276| (+ |v_ULTIMATE.start_main_~i~0#1_277| 1)) (< |v_ULTIMATE.start_main_~i~0#1_277| (+ |v_ULTIMATE.start_main_~i~0#1_278| 1)) (= (mod (select (let ((.cse16 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse15 (+ (select .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset|) 4))) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse15)))) (let ((.cse10 (let ((.cse12 (let ((.cse13 (let ((.cse14 (store (select .cse11 |ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| .cse15))) (store .cse14 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_279| 4)) (select (select (store .cse11 |ULTIMATE.start_main_~a~0#1.base| .cse14) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse13 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_278| 4)) (select (select (store .cse11 |ULTIMATE.start_main_~a~0#1.base| .cse13) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse12 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_277| 4)) (select (select (store .cse11 |ULTIMATE.start_main_~a~0#1.base| .cse12) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse10 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_276| 4)) (select (select (store .cse11 |ULTIMATE.start_main_~a~0#1.base| .cse10) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_279| 1))) (< (+ |c_ULTIMATE.start_main_~i~0#1| 4) c_~N~0)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= c_~N~0 2147483647) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_279| Int) (|v_ULTIMATE.start_main_~i~0#1_278| Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_277| Int) (|v_ULTIMATE.start_main_~i~0#1_276| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_278| (+ |v_ULTIMATE.start_main_~i~0#1_279| 1)) (< |v_ULTIMATE.start_main_~i~0#1_276| (+ |v_ULTIMATE.start_main_~i~0#1_277| 1)) (< |v_ULTIMATE.start_main_~i~0#1_277| (+ |v_ULTIMATE.start_main_~i~0#1_278| 1)) (= (mod (select (let ((.cse23 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse22 (+ 3 (select .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (let ((.cse18 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse23 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse22)))) (let ((.cse17 (let ((.cse19 (let ((.cse20 (let ((.cse21 (store (select .cse18 |ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| .cse22))) (store .cse21 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_279| 4)) (select (select (store .cse18 |ULTIMATE.start_main_~a~0#1.base| .cse21) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse20 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_278| 4)) (select (select (store .cse18 |ULTIMATE.start_main_~a~0#1.base| .cse20) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse19 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_277| 4)) (select (select (store .cse18 |ULTIMATE.start_main_~a~0#1.base| .cse19) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse17 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_276| 4)) (select (select (store .cse18 |ULTIMATE.start_main_~a~0#1.base| .cse17) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_279| 1))) (<= c_~N~0 .cse7) (< .cse9 c_~N~0)) (= |c_ULTIMATE.start_main_~#sum~0#1.offset| 0) (< 4 c_~N~0) (= 5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (<= |c_ULTIMATE.start_main_~i~0#1| 5) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_279| Int) (|v_ULTIMATE.start_main_~i~0#1_278| Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_277| Int) (|v_ULTIMATE.start_main_~i~0#1_276| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_278| (+ |v_ULTIMATE.start_main_~i~0#1_279| 1)) (< |v_ULTIMATE.start_main_~i~0#1_276| (+ |v_ULTIMATE.start_main_~i~0#1_277| 1)) (< |v_ULTIMATE.start_main_~i~0#1_277| (+ |v_ULTIMATE.start_main_~i~0#1_278| 1)) (= (mod (select (let ((.cse30 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse29 (+ (select .cse30 |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1))) (let ((.cse25 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse30 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse29)))) (let ((.cse24 (let ((.cse26 (let ((.cse27 (let ((.cse28 (store (select .cse25 |ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| .cse29))) (store .cse28 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_279| 4)) (select (select (store .cse25 |ULTIMATE.start_main_~a~0#1.base| .cse28) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse27 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_278| 4)) (select (select (store .cse25 |ULTIMATE.start_main_~a~0#1.base| .cse27) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse26 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_277| 4)) (select (select (store .cse25 |ULTIMATE.start_main_~a~0#1.base| .cse26) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse24 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_276| 4)) (select (select (store .cse25 |ULTIMATE.start_main_~a~0#1.base| .cse24) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_279| 1))) (<= c_~N~0 |c_ULTIMATE.start_main_~i~0#1|) (< .cse8 c_~N~0)))) is different from true [2021-11-21 00:16:08,730 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse7 (+ 2 |c_ULTIMATE.start_main_~i~0#1|)) (.cse8 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (or (forall ((|v_ULTIMATE.start_main_~i~0#1_279| Int) (|v_ULTIMATE.start_main_~i~0#1_278| Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_277| Int) (|v_ULTIMATE.start_main_~i~0#1_276| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_278| (+ |v_ULTIMATE.start_main_~i~0#1_279| 1)) (< |v_ULTIMATE.start_main_~i~0#1_276| (+ |v_ULTIMATE.start_main_~i~0#1_277| 1)) (< |v_ULTIMATE.start_main_~i~0#1_277| (+ |v_ULTIMATE.start_main_~i~0#1_278| 1)) (= (mod (select (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse5 (+ 2 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse5)))) (let ((.cse0 (let ((.cse2 (let ((.cse3 (let ((.cse4 (store (select .cse1 |ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| .cse5))) (store .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_279| 4)) (select (select (store .cse1 |ULTIMATE.start_main_~a~0#1.base| .cse4) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_278| 4)) (select (select (store .cse1 |ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_277| 4)) (select (select (store .cse1 |ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_276| 4)) (select (select (store .cse1 |ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_279| 1))) (< .cse7 c_~N~0) (<= c_~N~0 .cse8)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_279| Int) (|v_ULTIMATE.start_main_~i~0#1_278| Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_277| Int) (|v_ULTIMATE.start_main_~i~0#1_276| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_278| (+ |v_ULTIMATE.start_main_~i~0#1_279| 1)) (< |v_ULTIMATE.start_main_~i~0#1_276| (+ |v_ULTIMATE.start_main_~i~0#1_277| 1)) (< |v_ULTIMATE.start_main_~i~0#1_277| (+ |v_ULTIMATE.start_main_~i~0#1_278| 1)) (= (mod (select (let ((.cse15 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse14 (+ 3 (select .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse14)))) (let ((.cse9 (let ((.cse11 (let ((.cse12 (let ((.cse13 (store (select .cse10 |ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| .cse14))) (store .cse13 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_279| 4)) (select (select (store .cse10 |ULTIMATE.start_main_~a~0#1.base| .cse13) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse12 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_278| 4)) (select (select (store .cse10 |ULTIMATE.start_main_~a~0#1.base| .cse12) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse11 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_277| 4)) (select (select (store .cse10 |ULTIMATE.start_main_~a~0#1.base| .cse11) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_276| 4)) (select (select (store .cse10 |ULTIMATE.start_main_~a~0#1.base| .cse9) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_279| 1))) (<= c_~N~0 .cse7) (< (+ 3 |c_ULTIMATE.start_main_~i~0#1|) c_~N~0)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_279| Int) (|v_ULTIMATE.start_main_~i~0#1_278| Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_277| Int) (|v_ULTIMATE.start_main_~i~0#1_276| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_278| (+ |v_ULTIMATE.start_main_~i~0#1_279| 1)) (< |v_ULTIMATE.start_main_~i~0#1_276| (+ |v_ULTIMATE.start_main_~i~0#1_277| 1)) (< |v_ULTIMATE.start_main_~i~0#1_277| (+ |v_ULTIMATE.start_main_~i~0#1_278| 1)) (= (mod (select (let ((.cse22 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse21 (+ (select .cse22 |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1))) (let ((.cse17 (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse22 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse21)))) (let ((.cse16 (let ((.cse18 (let ((.cse19 (let ((.cse20 (store (select .cse17 |ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| .cse21))) (store .cse20 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_279| 4)) (select (select (store .cse17 |ULTIMATE.start_main_~a~0#1.base| .cse20) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse19 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_278| 4)) (select (select (store .cse17 |ULTIMATE.start_main_~a~0#1.base| .cse19) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse18 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_277| 4)) (select (select (store .cse17 |ULTIMATE.start_main_~a~0#1.base| .cse18) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse16 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_276| 4)) (select (select (store .cse17 |ULTIMATE.start_main_~a~0#1.base| .cse16) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_279| 1))) (<= c_~N~0 |c_ULTIMATE.start_main_~i~0#1|) (< .cse8 c_~N~0)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_279| Int) (|v_ULTIMATE.start_main_~i~0#1_278| Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_277| Int) (|v_ULTIMATE.start_main_~i~0#1_276| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_278| (+ |v_ULTIMATE.start_main_~i~0#1_279| 1)) (< |v_ULTIMATE.start_main_~i~0#1_276| (+ |v_ULTIMATE.start_main_~i~0#1_277| 1)) (= (mod (select (let ((.cse23 (let ((.cse24 (let ((.cse25 (let ((.cse26 (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse26 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_279| 4)) (select (select (store |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base| .cse26) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse25 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_278| 4)) (select (select (store |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base| .cse25) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse24 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_277| 4)) (select (select (store |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base| .cse24) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse23 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_276| 4)) (select (select (store |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base| .cse23) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_277| (+ |v_ULTIMATE.start_main_~i~0#1_278| 1)) (< |v_ULTIMATE.start_main_~i~0#1_279| 1))) (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0)))) is different from true [2021-11-21 00:16:18,895 WARN L227 SmtUtils]: Spent 9.37s on a formula simplification that was a NOOP. DAG size: 118 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:16:20,899 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_278| Int) (|v_ULTIMATE.start_main_~i~0#1_277| Int) (|v_ULTIMATE.start_main_~i~0#1_276| Int)) (or (= (mod (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_278| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_277| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_276| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse0) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) |c_ULTIMATE.start_main_~a~0#1.offset|) c_~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_278| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< |v_ULTIMATE.start_main_~i~0#1_276| (+ |v_ULTIMATE.start_main_~i~0#1_277| 1)) (< |v_ULTIMATE.start_main_~i~0#1_277| (+ |v_ULTIMATE.start_main_~i~0#1_278| 1)))) (= |c_ULTIMATE.start_main_~#sum~0#1.offset| 0) (< 4 c_~N~0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) 5) (= 5 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (<= c_~N~0 5)) is different from false [2021-11-21 00:16:39,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:16:39,346 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2021-11-21 00:16:39,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-21 00:16:39,347 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 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 17 [2021-11-21 00:16:39,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:16:39,348 INFO L225 Difference]: With dead ends: 68 [2021-11-21 00:16:39,348 INFO L226 Difference]: Without dead ends: 66 [2021-11-21 00:16:39,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 93.7s TimeCoverageRelationStatistics Valid=287, Invalid=1421, Unknown=30, NotChecked=332, Total=2070 [2021-11-21 00:16:39,349 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:16:39,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 51 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 125 Unchecked, 0.3s Time] [2021-11-21 00:16:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-21 00:16:39,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 37. [2021-11-21 00:16:39,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 36 states have internal predecessors, (48), 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 00:16:39,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-11-21 00:16:39,365 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 17 [2021-11-21 00:16:39,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:16:39,366 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-11-21 00:16:39,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 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 00:16:39,366 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-11-21 00:16:39,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-21 00:16:39,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:16:39,367 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:16:39,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-21 00:16:39,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-21 00:16:39,593 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:16:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:16:39,594 INFO L85 PathProgramCache]: Analyzing trace with hash -935306789, now seen corresponding path program 3 times [2021-11-21 00:16:39,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:16:39,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153177972] [2021-11-21 00:16:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:16:39,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:16:39,605 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:16:39,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706505969] [2021-11-21 00:16:39,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:16:39,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:16:39,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:16:39,607 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:16:39,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-21 00:16:39,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:16:39,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:16:39,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-21 00:16:39,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:16:39,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:16:39,764 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-21 00:16:39,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-21 00:16:39,884 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-21 00:16:39,884 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 3 case distinctions, treesize of input 29 treesize of output 27 [2021-11-21 00:16:40,045 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-11-21 00:16:40,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 49 [2021-11-21 00:16:40,290 INFO L354 Elim1Store]: treesize reduction 200, result has 14.9 percent of original size [2021-11-21 00:16:40,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 66 [2021-11-21 00:16:42,916 INFO L354 Elim1Store]: treesize reduction 136, result has 0.7 percent of original size [2021-11-21 00:16:42,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 566 treesize of output 380 [2021-11-21 00:16:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:16:43,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:16:47,018 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (<= ~N~0 |c_ULTIMATE.start_main_~i~0#1|)))) is different from false [2021-11-21 00:17:00,210 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_303| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_304| Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse2 (+ (* |v_ULTIMATE.start_main_~i~0#1_304| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse1 (+ (* |v_ULTIMATE.start_main_~i~0#1_303| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (or (< |v_ULTIMATE.start_main_~i~0#1_304| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< |v_ULTIMATE.start_main_~i~0#1_303| (+ |v_ULTIMATE.start_main_~i~0#1_304| 1)) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (<= ~N~0 |v_ULTIMATE.start_main_~i~0#1_303|)))) is different from false [2021-11-21 00:17:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 7 not checked. [2021-11-21 00:17:13,907 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:17:13,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153177972] [2021-11-21 00:17:13,907 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:17:13,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706505969] [2021-11-21 00:17:13,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706505969] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:17:13,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487237740] [2021-11-21 00:17:13,909 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:17:13,909 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:17:13,910 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:17:13,910 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:17:13,910 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:17:14,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:14,183 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 00:17:14,185 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 00:17:14,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:14,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:14,569 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-21 00:17:14,569 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 00:17:14,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:14,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:14,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:14,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:15,116 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:17:15,116 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 00:17:15,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:17:15,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:17:15,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:17:15,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:17:16,030 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:17:16,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-21 00:17:16,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:17:16,347 INFO L354 Elim1Store]: treesize reduction 54, result has 34.9 percent of original size [2021-11-21 00:17:16,347 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 3 case distinctions, treesize of input 43 treesize of output 55 [2021-11-21 00:17:16,549 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:17:16,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:17:21,544 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:17:23,566 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:17:23,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:17:23,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-11-21 00:17:23,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815639256] [2021-11-21 00:17:23,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:17:23,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 00:17:23,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:17:23,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 00:17:23,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=458, Unknown=10, NotChecked=90, Total=650 [2021-11-21 00:17:23,568 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:17:25,768 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_303| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_304| Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse2 (+ (* |v_ULTIMATE.start_main_~i~0#1_304| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse1 (+ (* |v_ULTIMATE.start_main_~i~0#1_303| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (or (< |v_ULTIMATE.start_main_~i~0#1_304| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< |v_ULTIMATE.start_main_~i~0#1_303| (+ |v_ULTIMATE.start_main_~i~0#1_304| 1)) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (<= ~N~0 |v_ULTIMATE.start_main_~i~0#1_303|)))) (= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2021-11-21 00:17:28,257 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (= .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (exists ((|v_ULTIMATE.start_main_~i~0#1_297| Int)) (and (<= 2 |v_ULTIMATE.start_main_~i~0#1_297|) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_297| 4))))) (<= (+ |v_ULTIMATE.start_main_~i~0#1_297| 1) |c_ULTIMATE.start_main_~i~0#1|))) (forall ((~N~0 Int)) (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (not (= (mod (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (<= ~N~0 |c_ULTIMATE.start_main_~i~0#1|)))) (= .cse0 (select .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))))) is different from false [2021-11-21 00:17:30,709 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (select .cse6 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (= .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (exists ((|v_ULTIMATE.start_main_~i~0#1_297| Int)) (and (<= 2 |v_ULTIMATE.start_main_~i~0#1_297|) (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_297| 4))))) (<= (+ |v_ULTIMATE.start_main_~i~0#1_297| 1) |c_ULTIMATE.start_main_~i~0#1|))) (exists ((|ULTIMATE.start_main_~#sum~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_297| Int) (|v_ULTIMATE.start_main_~i~0#1_298| Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int)) (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse2 (select .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_297| 4)))) (.cse3 (select (select |c_#memory_int| |ULTIMATE.start_main_~#sum~0#1.base|) |ULTIMATE.start_main_~#sum~0#1.offset|))) (and (< |v_ULTIMATE.start_main_~i~0#1_298| c_~N~0) (<= 2 |v_ULTIMATE.start_main_~i~0#1_297|) (= .cse2 .cse3) (= (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) .cse2) (= (select .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) .cse2) (<= (+ |v_ULTIMATE.start_main_~i~0#1_297| 1) |v_ULTIMATE.start_main_~i~0#1_298|) (= (select .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_298| 4))) .cse3))))) (forall ((~N~0 Int)) (let ((.cse5 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (not (= (mod (select .cse5 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (<= ~N~0 |c_ULTIMATE.start_main_~i~0#1|)))) (= .cse0 (select .cse6 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))))) is different from false [2021-11-21 00:17:31,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:17:31,363 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2021-11-21 00:17:31,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-21 00:17:31,363 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-21 00:17:31,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:17:31,364 INFO L225 Difference]: With dead ends: 66 [2021-11-21 00:17:31,364 INFO L226 Difference]: Without dead ends: 64 [2021-11-21 00:17:31,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=111, Invalid=546, Unknown=13, NotChecked=260, Total=930 [2021-11-21 00:17:31,365 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 19 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:17:31,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 30 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 86 Unchecked, 0.4s Time] [2021-11-21 00:17:31,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-21 00:17:31,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 43. [2021-11-21 00:17:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4047619047619047) internal successors, (59), 42 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:17:31,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 59 transitions. [2021-11-21 00:17:31,383 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 59 transitions. Word has length 18 [2021-11-21 00:17:31,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:17:31,384 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 59 transitions. [2021-11-21 00:17:31,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:17:31,384 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 59 transitions. [2021-11-21 00:17:31,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-21 00:17:31,385 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:17:31,385 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:17:31,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-21 00:17:31,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-21 00:17:31,598 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:17:31,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:17:31,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1173097116, now seen corresponding path program 4 times [2021-11-21 00:17:31,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:17:31,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933534933] [2021-11-21 00:17:31,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:17:31,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:17:31,607 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:17:31,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893029659] [2021-11-21 00:17:31,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:17:31,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:17:31,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:17:31,609 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:17:31,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-21 00:17:31,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:17:31,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-21 00:17:31,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:17:31,670 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 00:17:31,686 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 00:17:31,733 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 25 treesize of output 13 [2021-11-21 00:17:31,792 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 25 treesize of output 13 [2021-11-21 00:17:31,859 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 25 treesize of output 13 [2021-11-21 00:17:31,989 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 23 treesize of output 18 [2021-11-21 00:17:32,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:32,120 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 30 [2021-11-21 00:17:32,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:32,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:32,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:17:32,274 INFO L354 Elim1Store]: treesize reduction 55, result has 11.3 percent of original size [2021-11-21 00:17:32,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 46 [2021-11-21 00:17:34,732 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-21 00:17:34,733 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 485 treesize of output 373 [2021-11-21 00:17:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:17:35,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:17:40,736 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int)) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) ~N~0) 0)))) is different from false [2021-11-21 00:18:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 1 times theorem prover too weak. 6 trivial. 3 not checked. [2021-11-21 00:18:09,801 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:18:09,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933534933] [2021-11-21 00:18:09,801 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:18:09,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893029659] [2021-11-21 00:18:09,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893029659] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:18:09,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1343734753] [2021-11-21 00:18:09,803 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:18:09,803 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:18:09,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:18:09,803 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:18:09,804 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:18:09,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:10,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:10,216 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-21 00:18:10,217 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 00:18:10,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:10,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:10,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:10,638 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:18:10,638 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 00:18:10,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:10,850 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 00:18:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:11,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:11,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2021-11-21 00:18:11,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:18:11,782 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 00:18:11,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 375 treesize of output 350 [2021-11-21 00:18:12,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:18:12,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:18:12,976 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:18:12,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:18:13,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:13,264 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 00:18:13,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 43 [2021-11-21 00:18:13,542 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:18:13,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:18:18,465 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:18:20,667 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:18:20,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:18:20,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-11-21 00:18:20,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967567016] [2021-11-21 00:18:20,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:18:20,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-21 00:18:20,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:18:20,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-21 00:18:20,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=703, Unknown=12, NotChecked=54, Total=870 [2021-11-21 00:18:20,668 INFO L87 Difference]: Start difference. First operand 43 states and 59 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:18:25,688 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((~N~0 Int)) (let ((.cse0 (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse2) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse2 4) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))))) (or (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= 0 (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) ~N~0))))) (forall ((~N~0 Int)) (let ((.cse3 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (or (not (= (mod (select .cse3 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) ~N~0) 0)))) (forall ((~N~0 Int)) (let ((.cse4 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (not (= (mod (select .cse4 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) ~N~0) 0))))) is different from false [2021-11-21 00:18:27,785 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((~N~0 Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (or (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) ~N~0) 0)))) (forall ((~N~0 Int)) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (or (not (= (mod (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (= (mod (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) ~N~0) 0))))) is different from false [2021-11-21 00:18:27,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:18:27,973 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2021-11-21 00:18:27,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-21 00:18:27,973 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-21 00:18:27,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:18:27,974 INFO L225 Difference]: With dead ends: 64 [2021-11-21 00:18:27,974 INFO L226 Difference]: Without dead ends: 62 [2021-11-21 00:18:27,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 44.4s TimeCoverageRelationStatistics Valid=120, Invalid=808, Unknown=14, NotChecked=180, Total=1122 [2021-11-21 00:18:27,976 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:18:27,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 36 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 131 Unchecked, 0.4s Time] [2021-11-21 00:18:27,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-21 00:18:28,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 50. [2021-11-21 00:18:28,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.4285714285714286) internal successors, (70), 49 states have internal predecessors, (70), 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 00:18:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2021-11-21 00:18:28,003 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 19 [2021-11-21 00:18:28,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:18:28,004 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 70 transitions. [2021-11-21 00:18:28,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:18:28,004 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 70 transitions. [2021-11-21 00:18:28,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-21 00:18:28,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:18:28,005 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:18:28,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-21 00:18:28,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-21 00:18:28,213 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:18:28,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:18:28,214 INFO L85 PathProgramCache]: Analyzing trace with hash 268152699, now seen corresponding path program 5 times [2021-11-21 00:18:28,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:18:28,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410472351] [2021-11-21 00:18:28,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:18:28,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:18:28,223 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:18:28,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9112196] [2021-11-21 00:18:28,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-21 00:18:28,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:18:28,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:18:28,227 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:18:28,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-21 00:18:28,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-21 00:18:28,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:18:28,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-21 00:18:28,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:18:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:18:28,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:18:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-21 00:18:29,333 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:18:29,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410472351] [2021-11-21 00:18:29,333 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:18:29,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9112196] [2021-11-21 00:18:29,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9112196] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:18:29,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [410730861] [2021-11-21 00:18:29,335 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:18:29,336 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:18:29,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:18:29,336 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:18:29,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:18:29,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:29,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:29,746 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-21 00:18:29,747 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 00:18:29,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:29,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:29,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:30,164 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:18:30,164 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 00:18:30,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:30,358 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 00:18:30,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:30,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2021-11-21 00:18:31,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:18:31,231 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 00:18:31,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 375 treesize of output 350 [2021-11-21 00:18:32,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:18:32,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:18:32,557 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:18:32,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:18:32,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:32,753 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 00:18:32,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 43 [2021-11-21 00:18:33,094 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:18:33,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:18:38,321 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:18:40,002 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:18:40,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:18:40,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-11-21 00:18:40,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318579771] [2021-11-21 00:18:40,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:18:40,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-21 00:18:40,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:18:40,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-21 00:18:40,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-11-21 00:18:40,004 INFO L87 Difference]: Start difference. First operand 50 states and 70 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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 00:18:41,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:18:41,823 INFO L93 Difference]: Finished difference Result 155 states and 179 transitions. [2021-11-21 00:18:41,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-21 00:18:41,824 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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 20 [2021-11-21 00:18:41,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:18:41,825 INFO L225 Difference]: With dead ends: 155 [2021-11-21 00:18:41,825 INFO L226 Difference]: Without dead ends: 118 [2021-11-21 00:18:41,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-11-21 00:18:41,827 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 222 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:18:41,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 99 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-21 00:18:41,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-21 00:18:41,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 68. [2021-11-21 00:18:41,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.2835820895522387) internal successors, (86), 67 states have internal predecessors, (86), 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 00:18:41,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2021-11-21 00:18:41,856 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 20 [2021-11-21 00:18:41,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:18:41,856 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2021-11-21 00:18:41,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 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 00:18:41,856 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2021-11-21 00:18:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 00:18:41,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:18:41,857 INFO L514 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:18:41,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-21 00:18:42,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-21 00:18:42,062 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:18:42,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:18:42,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1709994669, now seen corresponding path program 10 times [2021-11-21 00:18:42,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:18:42,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681290913] [2021-11-21 00:18:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:18:42,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:18:42,071 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:18:42,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1521642841] [2021-11-21 00:18:42,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:18:42,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:18:42,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:18:42,082 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:18:42,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-21 00:18:42,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:18:42,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-21 00:18:42,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:18:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:18:42,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:18:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:18:43,609 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:18:43,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681290913] [2021-11-21 00:18:43,609 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:18:43,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521642841] [2021-11-21 00:18:43,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521642841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:18:43,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1705065498] [2021-11-21 00:18:43,610 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-21 00:18:43,610 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:18:43,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:18:43,611 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:18:43,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:18:43,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:43,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:43,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:44,058 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:18:44,058 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 00:18:44,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:44,271 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 00:18:44,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:44,398 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 00:18:44,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:44,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:44,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2021-11-21 00:18:45,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:18:45,175 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 00:18:45,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 372 treesize of output 347 [2021-11-21 00:18:46,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:18:46,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:18:46,468 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:18:46,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:18:46,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:18:46,690 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 00:18:46,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 43 [2021-11-21 00:18:46,939 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:18:46,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:18:48,225 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:18:49,511 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:18:49,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:18:49,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 29 [2021-11-21 00:18:49,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207543785] [2021-11-21 00:18:49,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:18:49,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-21 00:18:49,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:18:49,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-21 00:18:49,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=863, Unknown=0, NotChecked=0, Total=1122 [2021-11-21 00:18:49,513 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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 00:18:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:18:53,564 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2021-11-21 00:18:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-21 00:18:53,566 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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 21 [2021-11-21 00:18:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:18:53,567 INFO L225 Difference]: With dead ends: 198 [2021-11-21 00:18:53,567 INFO L226 Difference]: Without dead ends: 172 [2021-11-21 00:18:53,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=903, Invalid=3003, Unknown=0, NotChecked=0, Total=3906 [2021-11-21 00:18:53,571 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 168 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:18:53,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 321 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-11-21 00:18:53,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-21 00:18:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 68. [2021-11-21 00:18:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 67 states have internal predecessors, (80), 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 00:18:53,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-11-21 00:18:53,599 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 21 [2021-11-21 00:18:53,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:18:53,599 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-11-21 00:18:53,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 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 00:18:53,600 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-11-21 00:18:53,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-21 00:18:53,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:18:53,600 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-21 00:18:53,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-21 00:18:53,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:18:53,803 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:18:53,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:18:53,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2028439149, now seen corresponding path program 6 times [2021-11-21 00:18:53,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:18:53,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503266804] [2021-11-21 00:18:53,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:18:53,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:18:53,815 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:18:53,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765168614] [2021-11-21 00:18:53,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-21 00:18:53,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:18:53,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:18:53,817 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:18:53,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-21 00:18:53,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-21 00:18:53,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-21 00:18:53,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-21 00:18:53,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:18:53,971 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-21 00:18:53,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-21 00:18:54,111 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-11-21 00:18:54,112 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 3 case distinctions, treesize of input 31 treesize of output 29 [2021-11-21 00:18:54,296 INFO L354 Elim1Store]: treesize reduction 132, result has 16.5 percent of original size [2021-11-21 00:18:54,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 49 [2021-11-21 00:18:56,629 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-11-21 00:18:56,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 550 treesize of output 372 [2021-11-21 00:18:56,913 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-21 00:18:56,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:19:26,874 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_427| Int)) (let ((.cse0 (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_427| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (or (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) ~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_427| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (<= ~N~0 |v_ULTIMATE.start_main_~i~0#1_427|) (not (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0))))) is different from false [2021-11-21 00:19:26,940 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:19:26,941 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 246 treesize of output 222 [2021-11-21 00:19:27,417 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:19:27,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 444 treesize of output 436 [2021-11-21 00:19:27,432 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 436 treesize of output 408 [2021-11-21 00:19:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 1 times theorem prover too weak. 10 trivial. 4 not checked. [2021-11-21 00:19:47,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:19:47,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503266804] [2021-11-21 00:19:47,773 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:19:47,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765168614] [2021-11-21 00:19:47,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765168614] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:19:47,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1090748470] [2021-11-21 00:19:47,775 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:19:47,775 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:19:47,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:19:47,776 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:19:47,776 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:19:48,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:19:48,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:19:48,276 INFO L354 Elim1Store]: treesize reduction 62, result has 35.4 percent of original size [2021-11-21 00:19:48,277 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 00:19:48,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:19:48,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:19:48,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:19:48,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:19:48,836 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:19:48,837 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 00:19:49,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:19:49,135 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 00:19:49,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:19:49,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:19:49,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 24 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2021-11-21 00:19:50,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:19:50,166 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 00:19:50,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 375 treesize of output 350 [2021-11-21 00:19:51,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:19:51,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:19:51,773 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:19:51,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:19:52,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:19:52,081 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-21 00:19:52,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 43 [2021-11-21 00:19:52,393 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:19:52,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:19:58,823 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:20:01,348 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:20:01,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:20:01,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-11-21 00:20:01,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106293295] [2021-11-21 00:20:01,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:20:01,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-21 00:20:01,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:20:01,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-21 00:20:01,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=502, Unknown=12, NotChecked=46, Total=650 [2021-11-21 00:20:01,351 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:03,747 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (= 2 |c_ULTIMATE.start_main_~i~0#1|) (forall ((~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_427| Int)) (let ((.cse0 (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_427| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (or (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) ~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_427| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (<= ~N~0 |v_ULTIMATE.start_main_~i~0#1_427|) (not (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0)))))) is different from false [2021-11-21 00:20:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:20:06,366 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2021-11-21 00:20:06,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:20:06,367 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-21 00:20:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:20:06,368 INFO L225 Difference]: With dead ends: 85 [2021-11-21 00:20:06,368 INFO L226 Difference]: Without dead ends: 83 [2021-11-21 00:20:06,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 37.7s TimeCoverageRelationStatistics Valid=98, Invalid=546, Unknown=14, NotChecked=98, Total=756 [2021-11-21 00:20:06,370 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:20:06,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 26 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 62 Unchecked, 0.6s Time] [2021-11-21 00:20:06,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-21 00:20:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2021-11-21 00:20:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 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 00:20:06,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2021-11-21 00:20:06,406 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 21 [2021-11-21 00:20:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:20:06,406 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2021-11-21 00:20:06,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:20:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2021-11-21 00:20:06,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-21 00:20:06,407 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:20:06,407 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:20:06,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-21 00:20:06,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-21 00:20:06,613 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:20:06,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:20:06,614 INFO L85 PathProgramCache]: Analyzing trace with hash 489304827, now seen corresponding path program 7 times [2021-11-21 00:20:06,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:20:06,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354561327] [2021-11-21 00:20:06,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:20:06,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:20:06,626 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-21 00:20:06,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [256689139] [2021-11-21 00:20:06,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-21 00:20:06,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:20:06,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:20:06,636 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:20:06,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68968407-0dd9-4454-b73a-65839f53d9cd/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-21 00:20:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:20:06,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-21 00:20:06,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:20:06,708 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 00:20:06,721 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 00:20:06,773 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 25 treesize of output 13 [2021-11-21 00:20:06,838 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 25 treesize of output 13 [2021-11-21 00:20:06,917 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 25 treesize of output 13 [2021-11-21 00:20:07,005 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 25 treesize of output 13 [2021-11-21 00:20:07,088 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 25 treesize of output 13 [2021-11-21 00:20:07,174 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 25 treesize of output 13 [2021-11-21 00:20:07,379 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 28 treesize of output 23 [2021-11-21 00:20:07,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:07,529 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 30 [2021-11-21 00:20:07,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:07,758 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-11-21 00:20:07,759 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 2 case distinctions, treesize of input 51 treesize of output 52 [2021-11-21 00:20:07,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:08,071 INFO L354 Elim1Store]: treesize reduction 116, result has 19.4 percent of original size [2021-11-21 00:20:08,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 75 treesize of output 71 [2021-11-21 00:20:08,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:08,566 INFO L354 Elim1Store]: treesize reduction 194, result has 16.7 percent of original size [2021-11-21 00:20:08,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 99 treesize of output 90 [2021-11-21 00:20:09,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:20:09,380 INFO L354 Elim1Store]: treesize reduction 394, result has 12.6 percent of original size [2021-11-21 00:20:09,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 106 treesize of output 108 [2021-11-21 00:20:22,057 INFO L354 Elim1Store]: treesize reduction 232, result has 0.4 percent of original size [2021-11-21 00:20:22,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 388 treesize of output 286 [2021-11-21 00:20:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-21 00:20:22,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:21:05,402 WARN L838 $PredicateComparison]: unable to prove that (forall ((~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_452| Int)) (let ((.cse0 (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse1 (+ (* |v_ULTIMATE.start_main_~i~0#1_452| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (or (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_452| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0)))) is different from false [2021-11-21 00:21:07,917 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_453| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_452| Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_453| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse1 (+ (* |v_ULTIMATE.start_main_~i~0#1_452| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (or (< |v_ULTIMATE.start_main_~i~0#1_452| (+ |v_ULTIMATE.start_main_~i~0#1_453| 1)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_453| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-11-21 00:21:11,718 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_454| Int) (|v_ULTIMATE.start_main_~i~0#1_453| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_452| Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (let ((.cse3 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_454| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_453| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse1 (+ (* |v_ULTIMATE.start_main_~i~0#1_452| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (or (< |v_ULTIMATE.start_main_~i~0#1_452| (+ |v_ULTIMATE.start_main_~i~0#1_453| 1)) (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_453| (+ |v_ULTIMATE.start_main_~i~0#1_454| 1)) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_454| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) is different from false [2021-11-21 00:21:18,485 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_455| Int) (|v_ULTIMATE.start_main_~i~0#1_454| Int) (|v_ULTIMATE.start_main_~i~0#1_453| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_452| Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (let ((.cse3 (let ((.cse4 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_455| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse4) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_454| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_453| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse1 (+ (* |v_ULTIMATE.start_main_~i~0#1_452| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (or (= (mod (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_455| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< |v_ULTIMATE.start_main_~i~0#1_454| (+ |v_ULTIMATE.start_main_~i~0#1_455| 1)) (not (= (mod (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_452| (+ |v_ULTIMATE.start_main_~i~0#1_453| 1)) (< |v_ULTIMATE.start_main_~i~0#1_453| (+ |v_ULTIMATE.start_main_~i~0#1_454| 1))))) is different from false [2021-11-21 00:21:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21 trivial. 18 not checked. [2021-11-21 00:21:32,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:21:32,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354561327] [2021-11-21 00:21:32,311 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-21 00:21:32,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256689139] [2021-11-21 00:21:32,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256689139] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-21 00:21:32,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [672791830] [2021-11-21 00:21:32,312 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-21 00:21:32,313 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:21:32,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:21:32,313 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:21:32,313 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:21:32,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:32,717 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-21 00:21:32,718 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 00:21:32,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:32,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:32,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:32,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:33,260 INFO L354 Elim1Store]: treesize reduction 94, result has 27.7 percent of original size [2021-11-21 00:21:33,260 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 00:21:33,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:33,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:33,441 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 00:21:33,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:33,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:21:33,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 23 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 103 [2021-11-21 00:21:34,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:34,370 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-21 00:21:34,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 21 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 11 case distinctions, treesize of input 379 treesize of output 354 [2021-11-21 00:21:35,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 17 treesize of output 9 [2021-11-21 00:21:35,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:35,832 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-21 00:21:35,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-21 00:21:36,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-21 00:21:36,165 INFO L354 Elim1Store]: treesize reduction 54, result has 34.9 percent of original size [2021-11-21 00:21:36,166 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 3 case distinctions, treesize of input 43 treesize of output 55 [2021-11-21 00:21:36,512 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-21 00:21:36,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 20 [2021-11-21 00:21:42,771 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-21 00:21:46,018 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-21 00:21:46,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-21 00:21:46,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 32 [2021-11-21 00:21:46,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663055454] [2021-11-21 00:21:46,018 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-21 00:21:46,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-21 00:21:46,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:21:46,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-21 00:21:46,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=916, Unknown=27, NotChecked=260, Total=1332 [2021-11-21 00:21:46,020 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-21 00:21:53,640 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= |c_ULTIMATE.start_main_~i~0#1| 1) (= 6 .cse0) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |c_ULTIMATE.start_main_~i~0#1| 4))) .cse0) (forall ((|v_ULTIMATE.start_main_~i~0#1_455| Int) (|v_ULTIMATE.start_main_~i~0#1_454| Int) (|v_ULTIMATE.start_main_~i~0#1_453| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_452| Int)) (let ((.cse1 (let ((.cse2 (let ((.cse3 (let ((.cse4 (let ((.cse5 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_455| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse5) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_454| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse4) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_453| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse2 (+ (* |v_ULTIMATE.start_main_~i~0#1_452| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (or (= (mod (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_455| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (< |v_ULTIMATE.start_main_~i~0#1_454| (+ |v_ULTIMATE.start_main_~i~0#1_455| 1)) (not (= (mod (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_452| (+ |v_ULTIMATE.start_main_~i~0#1_453| 1)) (< |v_ULTIMATE.start_main_~i~0#1_453| (+ |v_ULTIMATE.start_main_~i~0#1_454| 1))))))) is different from false [2021-11-21 00:21:55,721 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 6) (forall ((|v_ULTIMATE.start_main_~i~0#1_454| Int) (|v_ULTIMATE.start_main_~i~0#1_453| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_452| Int)) (let ((.cse1 (let ((.cse2 (let ((.cse3 (let ((.cse4 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_454| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse4) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_453| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse2 (+ (* |v_ULTIMATE.start_main_~i~0#1_452| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (or (< |v_ULTIMATE.start_main_~i~0#1_452| (+ |v_ULTIMATE.start_main_~i~0#1_453| 1)) (= (mod (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (< |v_ULTIMATE.start_main_~i~0#1_453| (+ |v_ULTIMATE.start_main_~i~0#1_454| 1)) (not (= (mod (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_454| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) 6) (= 6 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (<= 2 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2021-11-21 00:21:57,764 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_444| Int)) (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_444| 4))))) (and (= .cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (<= (+ |v_ULTIMATE.start_main_~i~0#1_444| 1) |c_ULTIMATE.start_main_~i~0#1|) (= .cse0 6) (<= 2 |v_ULTIMATE.start_main_~i~0#1_444|)))) (= (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 6) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_453| Int) (~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_452| Int)) (let ((.cse2 (let ((.cse3 (let ((.cse4 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_453| 4)) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse4) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (store .cse3 (+ (* |v_ULTIMATE.start_main_~i~0#1_452| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse3) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (or (< |v_ULTIMATE.start_main_~i~0#1_452| (+ |v_ULTIMATE.start_main_~i~0#1_453| 1)) (= (mod (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0) (not (= (mod (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_453| (+ |c_ULTIMATE.start_main_~i~0#1| 1))))) (= (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) 6))) is different from false [2021-11-21 00:21:59,792 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) 6) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) 6) (forall ((~N~0 Int) (|v_ULTIMATE.start_main_~i~0#1_452| Int)) (let ((.cse1 (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)))) (store .cse2 (+ (* |v_ULTIMATE.start_main_~i~0#1_452| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse2) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|))))) (or (not (= (mod (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) ~N~0) 0)) (< |v_ULTIMATE.start_main_~i~0#1_452| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (mod (select .cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) ~N~0) 0)))) (exists ((|v_ULTIMATE.start_main_~i~0#1_444| Int) (|v_ULTIMATE.start_main_~i~0#1_445| Int)) (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse3 (select .cse4 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_444| 4))))) (and (= .cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (= .cse3 (select .cse4 (+ (* |v_ULTIMATE.start_main_~i~0#1_445| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (= .cse3 6) (<= 2 |v_ULTIMATE.start_main_~i~0#1_444|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_444| 1) |v_ULTIMATE.start_main_~i~0#1_445|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_445| 1) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false